信息同步：
一、常用的liunx命令选项
-a 显示所有对象
-c 生成一个计数
-d 指定一个目录
-e 扩展一个目录
-f 指定读入数据的文件
-h 显示命令帮助的信息
-i 忽略文本大小写
-l 产生输出的长格式版本
-n 使用非交互模式（批处理）
-o 将所有输出重定向到的指定的输出文件
-q 以安静模式运行
-r 递归的处理目录和文件
-s以安静模式运行
子主题 1
-v 生成详细输出
-x 排除某个对象
-y 对所有问题回答yes
二、呈现数据
1，Linux标准文件描述3个
标准输入 STDIN 0
输入重定向符号 （<）
exec 0< testfile ，exec命令将STDIN重定向到Linux系统中的文件
标准输出 STDOUT 1
输出重定向（>）
将数据追加到某个文件（>>）
exec 1> testout exec 命令会启动一个新的shell并将STDOUT并将STDOUT文件描述符重定向到文件。
标准错误 STDERR 2
重定向错误（2>）
exec 3> test13out，exec命令给输出分配文件描述符
>&3
exec 3>> test13out
>&3
当出现 （&>）所有输出发送到同一位置
重定向
临时重定向 （>&2）
永久重定向（exec 2>testerr）
2，记录消息
tee filename ，tee命令相当于管道的T型接头。它将从STDIN过来的数据同时发往两处。一处是STDOUT, 另一处是tee命令行所指定的文件名。
tee -a filename，将数据追加到文件中，用-a选项
三、命令汇总
read -p "xxxx" answer
break
continue
for
if
while
until
case
echo
echo -e '....\t\n... ' 输出转义字符
常用的转义字符
\b 转义后相当于按退格键backspace，\b后要有数据
\c 不换行输出，在\c后面不存在字符的情况下。
\n 换行输出
\f 或 \v 换行，但是新行的开头位置连接着上一行的行尾
\t 转义后表示插入tab，制表符
\r 光标移至行首，但不换行，\r以后的字符替换行首的相同数量的字符。
\\ 表示插入本身
echo -n 表示不换行输出
四、控制脚本
1，处理信号
常用的Linux信号
信号1，值SIGHUP，挂起进程
信号2，值：SIGINT，终止进程
信号3，值：SIGOUIT，停止进程
可以中断shell，Linux内核会停止位shell分配CPU处理时间。
ctrl + c
信号9，值：SIGKILL，无条件终止进程
信号15，值：SIGTERM，尽可能终止进程
信号17，值：SIGSTOP，无条件停止进程，但不终止进程
信号18，值：SIGTSTP，停止或暂停进程，但不终止进程
ctrl + z
停止进程会继续保留在内存中，并能从上次停止的位置继续运行。
信号19，值：SIGCONT，继续运行停止的进程
捕获信号
trap命令，
捕获脚本退出：在trap命令后加EXIT信号
修改或移除捕获（tarp -- 信号）
命令格式： trap commands signals
命令格式： trap commands signals
命令格式： trap commands signals
命令格式： trap commands signals
2，后台运行脚本 &
方括号里是作业号，下一个是进程号PID
ps
3，非控制台下运行脚本
让脚本一直以后台模式运行到结束，即使退出了终端，可以用nohup命令来实现
nohup命令会自动将STDOUT和STDERR的消息重定向到一个名为nohup.out的文件中
4，作业控制（jobs）
jobs
jobs -l
列出进程的PID及作业号
jobs -n
只列出上次shell发出的通知后改变了状态的作业
jobs -p
只列出作业的PID
jobs -r
只列出运行中的作业
jobs -s
只列出已停止的作业
带加号的是默认作业
带减号的是下一个默认作业
5，重启停止作业
要以后台模式重启一个作业，可以用bg命令加上作业号（bg 作业号）
要以前台模式重启作业，可以用带有作业号的fg命令（fg 作业号）
6，调整谦让度
优先级
-20（最高优先级）
19(最低优先级)
nice设置命令启动时的调度优先级
nice -n 10 ./test4.sh > test4.out &
ps -p 8045 -o pid,ppid,ni,cmd
-n 命令行来指定新的优先级级别
renice想改变系统上一运行命令的优先级
ps -p 8089 -o pid,ppid,ni,cmd
renice -n 5 -p 8089
指定运行进程的PID来改变它的进程
注意：
root用户可以通过renice人员调整进程的优先级
普通用户只能对属于你的进程执行renice
普通用户只能通过renice降低进程的优先级
7，定时运行作业
at 命令
命令格式： at [-f filename] time
atd 守护进程----- /var/spool/at
cron 表
命令格式： min hour dayofmonth month dayofweek command
列出已有的cron时间表
crontab -l
五、高级shell脚本编程
1，创建函数
function name { command }
name 函数名称唯一
command 一条或多条命令
返回值
默认退出状态码（最后一条命令返回的退出状态码） -----用$?来确定函数的退出状态码
return 命令退出函数并返回特定的退出状态码
1，函数一结束就取返回值；2，退出状态码必须是0~255
函数递归
x! = x * (x-1)!
用简单的递归脚本
创建库
. ./func
在命令行上创建函数
function divem { echo $[ $1 / $2 ]; }
divem 100 5
注意：在每个命令后面加个分号
function doublit { read -p "Enter value:" value; echo $[ $value * 2 ]; }
doublit
2，图形化桌面的脚本编程
菜单
select命令
制作窗口 dialog包
3、正则表达式
。。。。。
4，sed
（1）作用：
1，一次从输入中读取一行数据
2，根据所提供的编辑器命令匹配数据
3，安装命令修改流中的数据
4，将新的数据输出到STDOUT
（2）sed命令选项
-e script
在处理输入时，将script中指定的命令添加到已有的命令中
如果需要多个命令，用-e选项；
sed -e 's/a/an/; s/test/test1/' sed.txt
-f file
在处理输入时，将file中指定的命令添加到已有的命令中
sed -f script.sed data1.txt
-n
不产生命令输出（-n将禁止sed编辑器输出），使用print命令来完成输出
sed -n 's/test/trial/p' data5.txt
（3）命令格式：
sed options script file
命令
echo "This is a test" | sed 's/test/big test/'
sed -e 's/a/an/;s/test/test1/' sed.txt
命令之间用分号隔开，末尾和分号之间不能有空格
（4）sed编辑器基础
1，默认情况下，它只替换每行中出现的第一处； ,2，要让替换命令能够替换一行中不同的地方出现的文本必须使用替换标记substitution flag
替换标记：s
格式：s/pattern/replacement/flags
4种可用的替换标记
1， 数字，表明新文本将替换第几处模式匹配的地方；
sed 's/test/trial/2' data4.txt
2，g，表明新文本将会替换所有匹配的文本；
sed 's/test/trial/g' data5.txt
3，p，表明原先的内容要打印出来；
sed -n 's/test/trial/p' data5.txt
4，w file， 将替换的结果写入到文件中；
sed -n 's/test/trial/w test52.txt' data5.txt
5， sed 's/\/bin\/bash/\/bin\/csh/' /etc/passwd 可以用其他方法：(用感叹号被用做字符串分隔符)
sed 's!/bin/bash!/bin/csh!' /etc/passwd
使用地址：作用于特定行或某些行，则必须用行寻址line addressing
两种形式的格式： [address]command 或 多个命令分组：address { command1 command2 command3 }
1，以数字形式表示行区间
sed '2s/dog/cat/' data1.txt 只修改指定地址的第2行修改
sed '2,$s/dog/cat/' data1.txt 从第2行开始的所有行修改，可以用特殊地址---美元符
2，用文本模式来 过滤出 行
/pattern/command
sed '/xiaoming/s/bash/csh/' /etc/passwd
3，命令组合
如果修改在单行上执行多条命令用花括号将多条命令组合在一起。
4，删除行
sed '2,4d' data1.txt 删除2,3，4行
sed '2d' data1.txt 删除2行
sed 'd' data1.txt 删除所有行
sed '3,$d' data1.txt 删除3行以下的行
5，打印
p命令来打印文本行
sed -n '2,3p' data1.txt 打印出2,3行
sed查找包含数字3的行
= 命令用来打印行号
sed '=' data1.txt
-n，能让sed只显示包含匹配的行的行号和文本
l （小写L）命令用来列出行
sed -n 'l' data1.txt
6，写入
sed '1,2w test53.txt' data1.txt
sed '/The/w test53.txt' data1.txt
7，读取
将文本插入到指定地址后#sed '3r data2.txt' data1.txt
sed '/2 The/r data2.txt' data1.txt
插入到末尾#sed '$r data2.txt' data1.txt
5、gawk
（1）作用：
1，定义变量来保持数据
2，使用算术和字符串操作符来处理数据；
3，通过使用结构化编程概念(比如if-then和循环)来为数据处理增加处理逻辑
4，通过提取数据文件中的数据元素，将其重新排列或格式化，生成格式化报告。
列如：格式化日志文件
（2）gawk命令格式
gawk options program file
用花括号定义
（3）gawk命令选项
-F fs 指定行中划分数据字段的字段分隔符
gawk -F: -f script3.gawk /etc/passwd
-f file 从指定的文件中读取程序
gawk -f script4.gawk /etc/passwd
-v var=value 定义gawk程序中的一个变量及其默认值
-mf N 指定要处理数据文件中的最大字段数
-mr N 指定数据文件中的最大数据行数
-W keyword 指定gawk的兼容模式或告警等级
（4）处理文本文件中的数据字段变量：
1，$0 代表整个文本行
2，$1 代表文本行中的第1个数据字段
gawk -F':' '{print $1}' /etc/passwd
3，$2 代表文本行中的第2个数据字段
4，$n 代表文本行中的第n个数据字段
5，gawk默认的字段分隔符是任意空白字符（例如空格或制表符）
shell
六、变量
1，test命令
（1）test命令的文件比较功能
-d file 检查file是否存在并是一个目录
-e file 检查file是否存在
-f file 检查file是否存在并是一个文件
-r file 检查file是否存在并可读
-s file 检查file是否存在并非空
-w file 检查file是否存在并可写
-x file 检查file是否存在并可执行
-O file 检查file是否存在并属当前用户所有
-G file 检查file是否存在并且默认组与当前用户相同
file1 -nt file2 检查fiel1是否比fiel2新
file1 -ot file2 检查file1是否比 file2 旧
（2）test命令的数值比较功能
n1 -eq n2 检查n1是否与n2 相等
n1 -ge n2 检查n1是否 大于或等于 n2
n1 -gt n2 检查n1是否与 大于 n2
n1 -le n2 小于或等于
n1 -lt n2 小于
n1 -ne n2 不等于
2、#,#,@,0,0,1,2,2,*,$$,$?的含义
$# 是传给脚本的参数个数
$0 是脚本本身的名字
$1 是传递给该shell脚本的第一个参数
$2 是传递给该shell脚本的第二个参数
$@ 是传给脚本的所有参数的列表
$* 是以一个单字符串显示所有向脚本传递的参数，与位置变量不同，参数可超过9个
$$ 是脚本运行的当前进程ID号
$? 是显示最后命令的退出状态，0表示没有错误，其他表示有错误
3、局部变量
local temp=$[ $value + 5 ]
4、Linux shell 中$() ` `，${}，$[] $(())，[ ] (( )) [[ ]]作用与区别
$( ) 与` ` (反引号) 都是用来做命令替换用(commandsubstitution)的
例如 version=$(uname -r)和version=`uname -r`都可以是version得到内核的版本号
${ }用于变量替换。一般情况下，$var 与${var} 并没有啥不一样。但是用 ${ } 会比较精确的界定变量名称的范围。
$ echo ${A}B
BB
$[] 和 $(()) :
它们是一样的，都是进行数学运算的。支持+ - * / %：分别为 “加、减、乘、除、取模”。但是注意，bash只能作整数运算，对于浮点数是当作字符串处理的。
[ ] :
即为test命令的另一种形式。
5、双括号命令符号(( expression ))
val++ 后增
val-- 后减
++val 先增
--val 先减
！逻辑求反
~ ~ ：位求反
** 幂运算
<< 左位移
>> 右位移
& 位布尔和
| 位布尔或
&& 逻辑和
|| 逻辑或
shell 示例：
1 Mon Apr 15 07:39:15 CST 2019 2 0731 3 0733 4 0741 5 #!/bin/bash 6 7 Jump_dir=/home/arthur 8 # 9 if [ -d $Jump_dir ] 10 then 11 echo "The $Jump_dir directory exists!" 12 cd $Jump_dir 13 ls 14 else 15 echo "The $Jump_dir directory dose not exist!" 16 fi 17 ######################## 18 #!/bin/bash 19 20 # 21 22 location=$HOME/my_test 23 file_name="sentinel" 24 # 25 if [ -e $location ] 26 then 27 echo "OK on the $location directory." 28 echo "Now checking on the file . $file_name." 29 # 30 if [ -e $location/$file_name ] 31 then 32 echo "OK on the filename." 33 echo "Updating Current Date..." 34 date >> $location/$file_name 35 else 36 echo "File does not exist." 37 echo "Nothing to update." 38 fi 39 else 40 echo "The $location directory does not exist." 41 echo "Nothing to update" 42 fi 43 #################################### 44 #!/bin/bash 45 46 item_name=$HOME/my_test/sentinel 47 echo 48 echo "The item being checked: $item_name" 49 echo 50 # 51 if [ -e $item_name ] 52 then 53 echo "the item, $item_name , does exist." 54 echo "But is it a file?" 55 echo 56 # 57 if [ -f $item_name ] 58 then 59 echo "yes, $item_name is a file." 60 else 61 echo "No, $item_name is not a file." 62 fi 63 else 64 echo "The item,$item_name, does not exist." 65 echo "Noting to update." 66 fi 67 ################################# 68 #!/bin/bash 69 70 pwfile=/etc/shadow 71 # 72 if [ -f $pwfile ] 73 then 74 if [ -r $pwfile ] 75 then 76 tail $pwfile 77 else 78 echo "Sorry, I am unable to read the $pwfile file." 79 fi 80 else 81 echo "Sorry, the $pwfile dose not exist." 82 fi 83 ######################################### 84 #!/bin/bash 85 86 file_name=$HOME/my_test/sentinel 87 if [ -f $file_name ] 88 then 89 if [ -s $file_name ] 90 then 91 echo "The $file_name file exists and has data in it." 92 echo "will not remove this file." 93 else 94 echo "The $file_name file exists, but is emputy." 95 echo "Deleting empty file...." 96 rm $file_name 97 fi 98 else 99 echo "File, $file_name , does not exist." 100 fi 101 ###################################### 102 #!/bin/bash 103 104 item_name=$HOME/my_test/sentinel 105 echo 106 echo "The item being checked; $item_name." 107 echo 108 if [ -f $item_name ] 109 then 110 echo "Yes, $item_name is a file." 111 echo "But is it writable ?" 112 echo 113 if [ -w $item_name ] 114 then 115 echo "Writing current time to $item_name." 116 date +%H%M >> $item_name 117 else 118 echo "Unable to write to $itme_name." 119 fi 120 else 121 echo "No, $itme_name is not a file." 122 fi 123 ###################################### 124 #!/bin/bash 125 126 if [ -x test16.sh ] 127 then 128 echo "You can run the script:" 129 ./test16.sh 130 else 131 echo "Sorry, you are unable to execute the script." 132 fi 133 #!/bin/bash 134 135 if [ -O /etc/passwd ] 136 then 137 echo "You are then owner of the /etc/passwd file." 138 else 139 echo "Sorry, you are not the owner of the /etc/passwd file." 140 fi 141 ###################################### 142 #!/bin/bash 143 144 if [ -G $HOME/my_test/testing ] 145 then 146 echo "You are in the same group as the file." 147 else 148 echo "The file is not owned by your group." 149 fi 150 ###################################### 151 #!/bin/bash 152 153 echo -n "The time and date are:" 154 date 155 echo "Let's see...:" 156 who 157 ###################################### 158 #/bin/bash 159 160 if [ test19.sh -nt test18.sh ] 161 then 162 echo "The test19 file is newer than test18" 163 else 164 echo "The test18 file is newer than test19" 165 fi 166 if [ test17.sh -ot test19.sh ] 167 then 168 echo "The test17 file is older than the test19 file." 169 fi 170 ###################################### 171 #!/bin/bash 172 173 if [ badfile1 -nt badfile2 ] 174 then 175 echo "The badfile1 file is newer than badfile2." 176 else 177 echo "The badfile2 file is newer than badfile1." 178 fi 179 ###################################### 180 #!/bin/bash 181 182 if [ -d $HOME ] && [ -w $HOME/testing ] 183 then 184 echo "The file exists and you can write to it." 185 else 186 echo "I cannot write to the file." 187 fi 188 ###################################### 189 #!/bin/bash 190 191 vall=10 192 if (( $vall ** 2 > 90 )) 193 then 194 (( val2 = $vall ** 2 )) 195 echo "The square of $vall is $val2." 196 fi 197 ###################################### 198 #!/bin/bash 199 200 if [[ $USER == r* ]] 201 then 202 echo "Hello, $USER" 203 else 204 echo "Sorry, I do not know you." 205 fi 206 ###################################### 207 #!/bin/bash 208 209 if [ $USER = "root" ] 210 then 211 echo "Welcome $USER" 212 echo "Please enjoy your visit" 213 elif [ $USER = "aaa" ] 214 then 215 echo "hello aaa" 216 elif [ $USER = "bbb" ] 217 then 218 echo "hello bbb" 219 else 220 echo "Sorry, you are not allowed here." 221 fi 222 ###################################### 223 #!/bin/bash 224 225 case $USER in 226 root | barbara) 227 echo "hello $USER." 228 echo "Please enjoy your visit";; 229 testing) 230 echo "Special testing account.";; 231 jessica) 232 echo "Do not forget to log off when you're done.";; 233 *) 234 echo "Sorry, you are not allowed here.";; 235 esac
1 #!/bin/bash 2 3 for test in I don't know if this'll work 4 do 5 echo "world:$test" 6 done 7 #!/bin/bash 8 9 var1=0 10 while echo "while iteration: $var1" 11 [ $var1 -lt 15 ] 12 do 13 if [ $var1 -gt 5 ] && [ $var1 -lt 10 ] 14 then 15 continue 16 fi 17 echo " Inside iteration number: $var1" 18 var1=$[ $var1 + 1 ] 19 done 20 21 A 22 B D 23 C A 24 D 25 E M 26 F 27 G 28 #!/bin/bash 29 30 var1=10 31 while [ $var1 -gt 0 ] 32 do 33 echo $var1 34 var1=$[ $var1 - 1 ] 35 done 36 #!/bin/bash 37 38 var1=10 39 while echo $var1 40 [ $var1 -ge 0 ] 41 do 42 echo "This is inside the loop" 43 var1=$[ $var1 - 1 ] 44 done 45 /usr/local/sbin: 46 /usr/local/bin: 47 /usr/sbin: 48 /usr/sbin/accessdb 49 /usr/sbin/addgnupghome 50 /usr/sbin/addpart 51 /usr/sbin/adduser 52 /usr/sbin/agetty 53 /usr/sbin/alternatives 54 /usr/sbin/anacron 55 /usr/sbin/applygnupgdefaults 56 /usr/sbin/arpd 57 /usr/sbin/arping 58 /usr/sbin/audispd 59 /usr/sbin/auditctl 60 /usr/sbin/auditd 61 /usr/sbin/augenrules 62 /usr/sbin/aureport 63 /usr/sbin/ausearch 64 /usr/sbin/authconfig 65 /usr/sbin/authconfig-tui 66 /usr/sbin/autrace 67 /usr/sbin/avcstat 68 /usr/sbin/badblocks 69 /usr/sbin/biosdecode 70 /usr/sbin/biosdevname 71 /usr/sbin/blkdeactivate 72 /usr/sbin/blkdiscard 73 /usr/sbin/blkid 74 /usr/sbin/blockdev 75 /usr/sbin/bridge 76 /usr/sbin/btrfs 77 /usr/sbin/btrfsck 78 /usr/sbin/btrfs-convert 79 /usr/sbin/btrfs-debug-tree 80 /usr/sbin/btrfs-find-root 81 /usr/sbin/btrfs-image 82 /usr/sbin/btrfs-map-logical 83 /usr/sbin/btrfs-select-super 84 /usr/sbin/btrfstune 85 /usr/sbin/btrfs-zero-log 86 /usr/sbin/build-locale-archive 87 /usr/sbin/cacertdir_rehash 88 /usr/sbin/cache_check 89 /usr/sbin/cache_dump 90 /usr/sbin/cache_metadata_size 91 /usr/sbin/cache_repair 92 /usr/sbin/cache_restore 93 /usr/sbin/cache_writeback 94 /usr/sbin/capsh 95 /usr/sbin/cbq 96 /usr/sbin/cfdisk 97 /usr/sbin/chcpu 98 /usr/sbin/chkconfig 99 /usr/sbin/chpasswd 100 /usr/sbin/chroot 101 /usr/sbin/clock 102 /usr/sbin/clockdiff 103 /usr/sbin/consoletype 104 /usr/sbin/cracklib-check 105 /usr/sbin/cracklib-format 106 /usr/sbin/cracklib-packer 107 /usr/sbin/cracklib-unpacker 108 /usr/sbin/create-cracklib-dict 109 /usr/sbin/crond 110 /usr/sbin/ctrlaltdel 111 /usr/sbin/ctstat 112 /usr/sbin/debugfs 113 /usr/sbin/delpart 114 /usr/sbin/depmod 115 /usr/sbin/devlink 116 /usr/sbin/dhclient 117 /usr/sbin/dhclient-script 118 /usr/sbin/dmeventd 119 /usr/sbin/dmfilemapd 120 /usr/sbin/dmidecode 121 /usr/sbin/dmsetup 122 /usr/sbin/dmstats 123 /usr/sbin/dracut 124 /usr/sbin/dumpe2fs 125 /usr/sbin/e2freefrag 126 /usr/sbin/e2fsck 127 /usr/sbin/e2image 128 /usr/sbin/e2label 129 /usr/sbin/e2undo 130 /usr/sbin/e4defrag 131 /usr/sbin/eapol_test 132 /usr/sbin/ebtables 133 /usr/sbin/ebtables-restore 134 /usr/sbin/ebtables-save 135 /usr/sbin/era_check 136 /usr/sbin/era_dump 137 /usr/sbin/era_invalidate 138 /usr/sbin/era_restore 139 /usr/sbin/ethtool 140 /usr/sbin/faillock 141 /usr/sbin/fdformat 142 /usr/sbin/fdisk 143 /usr/sbin/filefrag 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/usr/bin/nl-neightbl-list 840 /usr/bin/nl-pktloc-lookup 841 /usr/bin/nl-qdisc-add 842 /usr/bin/nl-qdisc-delete 843 /usr/bin/nl-qdisc-list 844 /usr/bin/nl-route-add 845 /usr/bin/nl-route-delete 846 /usr/bin/nl-route-get 847 /usr/bin/nl-route-list 848 /usr/bin/nl-rule-list 849 /usr/bin/nl-tctree-list 850 /usr/bin/nl-util-addr 851 /usr/bin/nm 852 /usr/bin/nmcli 853 /usr/bin/nm-online 854 /usr/bin/nmtui 855 /usr/bin/nmtui-connect 856 /usr/bin/nmtui-edit 857 /usr/bin/nmtui-hostname 858 /usr/bin/nohup 859 /usr/bin/nproc 860 /usr/bin/nroff 861 /usr/bin/nsenter 862 /usr/bin/numfmt 863 /usr/bin/objcopy 864 /usr/bin/objdump 865 /usr/bin/od 866 /usr/bin/oldfind 867 /usr/bin/open 868 /usr/bin/openssl 869 /usr/bin/openvt 870 /usr/bin/os-prober 871 /usr/bin/p11-kit 872 /usr/bin/passwd 873 /usr/bin/paste 874 /usr/bin/pathchk 875 /usr/bin/pchrt 876 /usr/bin/perl 877 /usr/bin/perl5.16.3 878 /usr/bin/perlbug 879 /usr/bin/perldoc 880 /usr/bin/perlthanks 881 /usr/bin/pflags 882 /usr/bin/pgawk 883 /usr/bin/pgrep 884 /usr/bin/pic 885 /usr/bin/piconv 886 /usr/bin/pinentry 887 /usr/bin/pinentry-curses 888 /usr/bin/ping 889 /usr/bin/ping6 890 /usr/bin/pinky 891 /usr/bin/pk12util 892 /usr/bin/pkaction 893 /usr/bin/pkcheck 894 /usr/bin/pkexec 895 /usr/bin/pkg-config 896 /usr/bin/pkill 897 /usr/bin/pkla-admin-identities 898 /usr/bin/pkla-check-authorization 899 /usr/bin/pkttyagent 900 /usr/bin/pl2pm 901 /usr/bin/pldd 902 /usr/bin/plymouth 903 /usr/bin/pmap 904 /usr/bin/pod2html 905 /usr/bin/pod2man 906 /usr/bin/pod2text 907 /usr/bin/pod2usage 908 /usr/bin/post-grohtml 909 /usr/bin/powernow-k8-decode 910 /usr/bin/pr 911 /usr/bin/preconv 912 /usr/bin/pre-grohtml 913 /usr/bin/printenv 914 /usr/bin/printf 915 /usr/bin/prlimit 916 /usr/bin/ps 917 /usr/bin/psed 918 /usr/bin/psfaddtable 919 /usr/bin/psfgettable 920 /usr/bin/psfstriptable 921 /usr/bin/psfxtable 922 /usr/bin/pstruct 923 /usr/bin/ptaskset 924 /usr/bin/ptx 925 /usr/bin/pwd 926 /usr/bin/pwdx 927 /usr/bin/pwmake 928 /usr/bin/pwscore 929 /usr/bin/pydoc 930 /usr/bin/python 931 /usr/bin/python2 932 /usr/bin/python2.7 933 /usr/bin/ranlib 934 /usr/bin/raw 935 /usr/bin/read 936 /usr/bin/readelf 937 /usr/bin/readlink 938 /usr/bin/realpath 939 /usr/bin/recode-sr-latin 940 /usr/bin/rename 941 /usr/bin/renice 942 /usr/bin/rescan-scsi-bus.sh 943 /usr/bin/reset 944 /usr/bin/resizecons 945 /usr/bin/rev 946 /usr/bin/rm 947 /usr/bin/rmail 948 /usr/bin/rmail.postfix 949 /usr/bin/rmdir 950 /usr/bin/rpcgen 951 /usr/bin/rpm 952 /usr/bin/rpm2cpio 953 /usr/bin/rpmdb 954 /usr/bin/rpmkeys 955 /usr/bin/rpmquery 956 /usr/bin/rpmverify 957 /usr/bin/rsyslog-recover-qi.pl 958 /usr/bin/runcon 959 /usr/bin/run-parts 960 /usr/bin/rvi 961 /usr/bin/rview 962 /usr/bin/rvim 963 /usr/bin/s2p 964 /usr/bin/scp 965 /usr/bin/script 966 /usr/bin/scriptreplay 967 /usr/bin/scsi_logging_level 968 /usr/bin/scsi_mandat 969 /usr/bin/scsi_readcap 970 /usr/bin/scsi_ready 971 /usr/bin/scsi-rescan 972 /usr/bin/scsi_satl 973 /usr/bin/scsi_start 974 /usr/bin/scsi_stop 975 /usr/bin/scsi_temperature 976 /usr/bin/sdiff 977 /usr/bin/secon 978 /usr/bin/sed 979 /usr/bin/seq 980 /usr/bin/setarch 981 /usr/bin/setfacl 982 /usr/bin/setfont 983 /usr/bin/setkeycodes 984 /usr/bin/setleds 985 /usr/bin/setmetamode 986 /usr/bin/setpriv 987 /usr/bin/setsid 988 /usr/bin/setterm 989 /usr/bin/setup-nsssysinit 990 /usr/bin/setup-nsssysinit.sh 991 /usr/bin/setvtrgb 992 /usr/bin/sftp 993 /usr/bin/sg 994 /usr/bin/sg_compare_and_write 995 /usr/bin/sg_copy_results 996 /usr/bin/sg_dd 997 /usr/bin/sg_decode_sense 998 /usr/bin/sg_emc_trespass 999 /usr/bin/sg_format 1000 /usr/bin/sg_get_config 1001 /usr/bin/sg_get_lba_status 1002 /usr/bin/sg_ident 1003 /usr/bin/sginfo 1004 /usr/bin/sg_inq 1005 /usr/bin/sg_logs 1006 /usr/bin/sg_luns 1007 /usr/bin/sg_map 1008 /usr/bin/sg_map26 1009 /usr/bin/sgm_dd 1010 /usr/bin/sg_modes 1011 /usr/bin/sg_opcodes 1012 /usr/bin/sgp_dd 1013 /usr/bin/sg_persist 1014 /usr/bin/sg_prevent 1015 /usr/bin/sg_raw 1016 /usr/bin/sg_rbuf 1017 /usr/bin/sg_rdac 1018 /usr/bin/sg_read 1019 /usr/bin/sg_read_block_limits 1020 /usr/bin/sg_read_buffer 1021 /usr/bin/sg_readcap 1022 /usr/bin/sg_read_long 1023 /usr/bin/sg_reassign 1024 /usr/bin/sg_referrals 1025 /usr/bin/sg_requests 1026 /usr/bin/sg_reset 1027 /usr/bin/sg_rmsn 1028 /usr/bin/sg_rtpg 1029 /usr/bin/sg_safte 1030 /usr/bin/sg_sanitize 1031 /usr/bin/sg_sat_identify 1032 /usr/bin/sg_sat_phy_event 1033 /usr/bin/sg_sat_set_features 1034 /usr/bin/sg_scan 1035 /usr/bin/sg_senddiag 1036 /usr/bin/sg_ses 1037 /usr/bin/sg_start 1038 /usr/bin/sg_stpg 1039 /usr/bin/sg_sync 1040 /usr/bin/sg_test_rwbuf 1041 /usr/bin/sg_turs 1042 /usr/bin/sg_unmap 1043 /usr/bin/sg_verify 1044 /usr/bin/sg_vpd 1045 /usr/bin/sg_write_buffer 1046 /usr/bin/sg_write_long 1047 /usr/bin/sg_write_same 1048 /usr/bin/sg_wr_mode 1049 /usr/bin/sg_xcopy 1050 /usr/bin/sh 1051 /usr/bin/sha1sum 1052 /usr/bin/sha224sum 1053 /usr/bin/sha256sum 1054 /usr/bin/sha384sum 1055 /usr/bin/sha512sum 1056 /usr/bin/showconsolefont 1057 /usr/bin/showkey 1058 /usr/bin/shred 1059 /usr/bin/shuf 1060 /usr/bin/signtool 1061 /usr/bin/signver 1062 /usr/bin/size 1063 /usr/bin/skill 1064 /usr/bin/slabtop 1065 /usr/bin/sleep 1066 /usr/bin/slogin 1067 /usr/bin/snice 1068 /usr/bin/soelim 1069 /usr/bin/sort 1070 /usr/bin/sotruss 1071 /usr/bin/splain 1072 /usr/bin/split 1073 /usr/bin/sprof 1074 /usr/bin/sqlite3 1075 /usr/bin/ssh 1076 /usr/bin/ssh-add 1077 /usr/bin/ssh-agent 1078 /usr/bin/ssh-copy-id 1079 /usr/bin/ssh-keygen 1080 /usr/bin/ssh-keyscan 1081 /usr/bin/ssltap 1082 /usr/bin/stat 1083 /usr/bin/stdbuf 1084 /usr/bin/strings 1085 /usr/bin/strip 1086 /usr/bin/stty 1087 /usr/bin/su 1088 /usr/bin/sudo 1089 /usr/bin/sudoedit 1090 /usr/bin/sudoreplay 1091 /usr/bin/sum 1092 /usr/bin/sync 1093 /usr/bin/systemctl 1094 /usr/bin/systemd-analyze 1095 /usr/bin/systemd-ask-password 1096 /usr/bin/systemd-cat 1097 /usr/bin/systemd-cgls 1098 /usr/bin/systemd-cgtop 1099 /usr/bin/systemd-coredumpctl 1100 /usr/bin/systemd-delta 1101 /usr/bin/systemd-detect-virt 1102 /usr/bin/systemd-escape 1103 /usr/bin/systemd-firstboot 1104 /usr/bin/systemd-hwdb 1105 /usr/bin/systemd-inhibit 1106 /usr/bin/systemd-loginctl 1107 /usr/bin/systemd-machine-id-setup 1108 /usr/bin/systemd-notify 1109 /usr/bin/systemd-nspawn 1110 /usr/bin/systemd-path 1111 /usr/bin/systemd-run 1112 /usr/bin/systemd-stdio-bridge 1113 /usr/bin/systemd-sysv-convert 1114 /usr/bin/systemd-tmpfiles 1115 /usr/bin/systemd-tty-ask-password-agent 1116 /usr/bin/tabs 1117 /usr/bin/tac 1118 /usr/bin/tail 1119 /usr/bin/tailf 1120 /usr/bin/tar 1121 /usr/bin/taskset 1122 /usr/bin/tbl 1123 /usr/bin/teamd 1124 /usr/bin/teamdctl 1125 /usr/bin/teamnl 1126 /usr/bin/tee 1127 /usr/bin/test 1128 /usr/bin/testgdbm 1129 /usr/bin/tic 1130 /usr/bin/timedatectl 1131 /usr/bin/timeout 1132 /usr/bin/tload 1133 /usr/bin/tmon 1134 /usr/bin/toe 1135 /usr/bin/top 1136 /usr/bin/touch 1137 /usr/bin/tput 1138 /usr/bin/tr 1139 /usr/bin/tracepath 1140 /usr/bin/tracepath6 1141 /usr/bin/troff 1142 /usr/bin/true 1143 /usr/bin/truncate 1144 /usr/bin/trust 1145 /usr/bin/tset 1146 /usr/bin/tsort 1147 /usr/bin/tty 1148 /usr/bin/turbostat 1149 /usr/bin/tzselect 1150 /usr/bin/udevadm 1151 /usr/bin/ul 1152 /usr/bin/ulockmgr_server 1153 /usr/bin/umask 1154 /usr/bin/umount 1155 /usr/bin/unalias 1156 /usr/bin/uname 1157 /usr/bin/unexpand 1158 /usr/bin/unicode_start 1159 /usr/bin/unicode_stop 1160 /usr/bin/uniq 1161 /usr/bin/unlink 1162 /usr/bin/unlz4 1163 /usr/bin/unshare 1164 /usr/bin/unxz 1165 /usr/bin/update-ca-trust 1166 /usr/bin/update-mime-database 1167 /usr/bin/uptime 1168 /usr/bin/urlgrabber 1169 /usr/bin/users 1170 /usr/bin/usleep 1171 /usr/bin/usx2yloader 1172 /usr/bin/utmpdump 1173 /usr/bin/uuidgen 1174 /usr/bin/vdir 1175 /usr/bin/VGAuthService 1176 /usr/bin/vi 1177 /usr/bin/view 1178 /usr/bin/vim 1179 /usr/bin/vimdiff 1180 /usr/bin/vimtutor 1181 /usr/bin/vlock 1182 /usr/bin/vmhgfs-fuse 1183 /usr/bin/vmstat 1184 /usr/bin/vm-support 1185 /usr/bin/vmtoolsd 1186 /usr/bin/vmware-checkvm 1187 /usr/bin/vmware-guestproxycerttool 1188 /usr/bin/vmware-hgfsclient 1189 /usr/bin/vmware-namespace-cmd 1190 /usr/bin/vmware-rpctool 1191 /usr/bin/vmware-toolbox-cmd 1192 /usr/bin/vmware-vgauth-cmd 1193 /usr/bin/vmware-xferlogs 1194 /usr/bin/vxloader 1195 /usr/bin/w 1196 /usr/bin/wait 1197 /usr/bin/wall 1198 /usr/bin/watch 1199 /usr/bin/watchgnupg 1200 /usr/bin/wc 1201 /usr/bin/wdctl 1202 /usr/bin/whatis 1203 /usr/bin/whereis 1204 /usr/bin/which 1205 /usr/bin/whiptail 1206 /usr/bin/who 1207 /usr/bin/whoami 1208 /usr/bin/write 1209 /usr/bin/x86_64 1210 /usr/bin/x86_energy_perf_policy 1211 /usr/bin/xargs 1212 /usr/bin/xgettext 1213 /usr/bin/xmlcatalog 1214 /usr/bin/xmllint 1215 /usr/bin/xmlsec1 1216 /usr/bin/xmlwf 1217 /usr/bin/xsltproc 1218 /usr/bin/xxd 1219 /usr/bin/xz 1220 /usr/bin/xzcat 1221 /usr/bin/xzcmp 1222 /usr/bin/xzdec 1223 /usr/bin/xzdiff 1224 /usr/bin/xzegrep 1225 /usr/bin/xzfgrep 1226 /usr/bin/xzgrep 1227 /usr/bin/xzless 1228 /usr/bin/xzmore 1229 /usr/bin/yes 1230 /usr/bin/ypdomainname 1231 /usr/bin/yum 1232 /usr/bin/zcat 1233 /usr/bin/zcmp 1234 /usr/bin/zdiff 1235 /usr/bin/zegrep 1236 /usr/bin/zfgrep 1237 /usr/bin/zforce 1238 /usr/bin/zgrep 1239 /usr/bin/zless 1240 /usr/bin/zmore 1241 /usr/bin/znew 1242 /usr/bin/zsoelim 1243 /root/bin: 1244 The number is 1 1245 The number is 2 1246 The number is 3 1247 The number is 4 1248 The number is 5 1249 The number is 6 1250 The number is 7 1251 The number is 8 1252 The number is 9 1253 #!/bin/bash 1254 1255 var1=100 1256 until [ $var1 -eq 0 ] 1257 do 1258 echo $var1 1259 var1=$[ $var1 - 25 ] 1260 done 1261 #!/bin/bash 1262 1263 var1=100 1264 until echo $var1 1265 [ $var1 -eq 0 ] 1266 do 1267 echo Inside the loop: $var1 1268 var1=$[ $var1 -25 ] 1269 done 1270 #!/bin/bash 1271 1272 for (( a=1; a<=3; a++ )) 1273 do 1274 echo "Starting lop $a:" 1275 for (( b=1; b<=3; b++ )) 1276 do 1277 echo " Inside loop: $b" 1278 done 1279 done 1280 #!/bin/bash 1281 1282 var1=5 1283 while [ $var1 -ge 0 ] 1284 do 1285 echo "Outer loop: $var1" 1286 for (( var2=1; $var2 < 3; var2++ )) 1287 do 1288 var3=$[ $var1 * $var2] 1289 echo " Inner loop: $var1 * $var2 = $var3" 1290 done 1291 var1=$[ $var1 - 1] 1292 done 1293 #!/bin/bash 1294 1295 var1=3 1296 until [ $var1 -eq 0 ] 1297 do 1298 echo "Outer loop: $var1" 1299 var2=1 1300 while [ $var2 -lt 5 ] 1301 do 1302 var3=$(echo "scale=4; $var1 / $var2" | bc) 1303 echo " Inner loop: $var1 / $var2 = $var3" 1304 var2=$[ $var2 + 1 ] 1305 done 1306 var1=$[ $var1 - 1 ] 1307 done 1308 #!/bin/bash 1309 1310 IFS.OLD=$IFS 1311 IFS=$'\n' 1312 for entry in $(cat /etc/passwd): 1313 do 1314 echo "Values in $entry -" 1315 IFS=: 1316 for value in $entry 1317 do 1318 echo " $value" 1319 done 1320 done 1321 #!/bin/bash 1322 1323 for var1 in 1 2 3 4 5 6 7 8 9 10 1324 do 1325 if [ $var1 -eq 5 ] 1326 then 1327 echo "good 5 !" 1328 break 1329 fi 1330 echo "Iteration number: $var1" 1331 done 1332 echo "The for loop is completed" 1333 #!/bin/bash 1334 1335 var1=1 1336 1337 while [ $var1 -lt 10 ] 1338 do 1339 if [ $var1 -eq 5 ] 1340 then 1341 break 1342 fi 1343 echo "Iteration: $var1" 1344 var1=$[ $var1 + 1 ] 1345 done 1346 echo "The while loop is completed." 1347 #!/bin/bash 1348 1349 for (( a = 1; a < 4; a++ )) 1350 do 1351 echo "Outer loop: $a" 1352 for (( b = 1; b < 100; b++)) 1353 do 1354 if [ $b -eq 5 ] 1355 then 1356 break 1357 fi 1358 echo " Inner loop: $b" 1359 done 1360 done 1361 #!/bin/bash 1362 1363 for test in Alabama Alaska Arizona Arkansas California Colorado 1364 do 1365 echo "The next state is $test" 1366 done 1367 echo "The last state we visited was $test" 1368 test=Connecticut 1369 echo "Wait, now we're visiting $test." 1370 #!/bin/bash 1371 1372 for test in Alabama Alaska Arizona Arkansas California Colorado 1373 do 1374 echo The next state is $test 1375 done 1376 #!/bin/bash 1377 1378 for (( a = 1; a < 4; a++ )) 1379 do 1380 echo "Outer loop: $a" 1381 for (( b = 1; b < 100; b++ )) 1382 do 1383 if [ $b -gt 4 ] 1384 then 1385 break 2 1386 fi 1387 echo " Inner loop: $b" 1388 done 1389 done 1390 1391 #!/bin/bash 1392 1393 for (( var1 = 1; var1 < 15; var1++ )) 1394 do 1395 if [ $var1 -gt 5 ] && [ $var1 -lt 10 ] 1396 then 1397 continue 1398 fi 1399 echo "Iteration number: $var1" 1400 done 1401 #!/bin/bash 1402 1403 for file in /home/haolb/* 1404 do 1405 if [ -d "$file" ] 1406 then 1407 echo "$file is a directory." 1408 elif 1409 echo "$file is a file." 1410 fi 1411 done > output.txt 1412 1413 #!/bin/bash 1414 1415 for (( a = 1; a <= 5; a++ )) 1416 do 1417 echo "Iteration $a:" 1418 for (( b = 1; b <3; b++ )) 1419 do 1420 if [ $a -gt 2 ] && [ $a -lt 4 ] 1421 then 1422 continue 2 1423 fi 1424 var3=$[ $a * $b] 1425 echo " The result of $a * $b is $var3." 1426 done 1427 done 1428 #!/bin/bash 1429 1430 for (( a = 1; a < 10; a++ )) 1431 do 1432 echo "The number is $a" 1433 done > test123.txt 1434 echo "The command is finished." 1435 #!/bin/bash 1436 1437 for state in "North Dakota" Connecticut Illinois Alabama Tennessee 1438 do 1439 echo "$state is netxt place to go." 1440 done | sort 1441 echo "This completes our travels." 1442 #!/bin/bash 1443 1444 IFS=: 1445 for folder in $PATH 1446 do 1447 echo "$folder:" 1448 for file in $folder/* 1449 do 1450 if [ -x $file ] 1451 then 1452 echo " $file" 1453 fi 1454 done 1455 done > test120.txt 1456 1457 #!/bin/bash 1458 1459 input="users.csv" 1460 while IFS=',' read -r userid name 1461 do 1462 echo "adding $userid" 1463 useradd -c "$name" -m $userid 1464 done < "$input" 1465 #!/bin/bash 1466 1467 for test in I don\'t know if "this'll" work 1468 do 1469 echo "world:$test" 1470 done 1471 1472 #!/bin/bash 1473 1474 for test in Nevada "New Hampshire" "New Mexico" "New York" 1475 do 1476 echo "Now going to $test" 1477 done 1478 #!/bin/bash 1479 1480 list="Alabama Alaska Arizona Arkansas California Colorado" 1481 list=$list" Connecticut" 1482 for state in $list 1483 do 1484 echo "Have you ever visited $state?" 1485 done 1486 #!/bin/bash 1487 1488 file="/etc/passwd" 1489 IFS=$':' 1490 1491 for i in $(cat $file) 1492 do 1493 echo $i 1494 done 1495 #!/bin/bash 1496 1497 file="states" 1498 IFS="\n" 1499 for state in $(cat $file) 1500 do 1501 echo "Visit beautiful $state" 1502 done 1503 #!/bin/bash 1504 1505 file="states" 1506 1507 for state in $(cat $file) 1508 do 1509 echo "Visit beautiful $state" 1510 done 1511 #!/bin/bash 1512 1513 for file in /root/my_test/* 1514 do 1515 if [ -d "$file" ] 1516 then 1517 echo "$file is a directory." 1518 elif [ -f "$file" ] 1519 then 1520 echo "$file is a file." 1521 fi 1522 done 1523 #!/bin/bash 1524 1525 for (( i=1; i <= 10; i++ )) 1526 do 1527 echo "The next number is $i" 1528 done 1529 #!/bin/bash 1530 1531 for (( a=1, b=10; a <= 10; a++, b-- )) 1532 do 1533 echo "$a - $b" 1534 done
1 #!/bin/bash 2 3 name=$(basename $0) 4 5 if [ $name = "addem" ] 6 then 7 total=$[ $1 + $2 ] 8 elif [ $name = "multem" ] 9 then 10 total=$[ $1 * $2] 11 fi 12 echo 13 echo The calculated value is $total 14 #!/bin/bash 15 16 name=$(basename $0) 17 18 if [ $name = "addem" ] 19 then 20 total=$[ $1 + $2 ] 21 elif [ $name = "multem" ] 22 then 23 total=$[ $1 * $2] 24 fi 25 echo 26 echo The calculated value is $total 27 11111111111111111111 28 22222222222222222222 29 33333333333333333333 30 434444444444444444 31 44444444444444444444 32 4 33 555555555555555 34 6666666666666666666 35 777777777777777777 36 #!/bin/bash 37 38 params=$# 39 echo 40 echo The last parameter is $params 41 echo The last parameter is ${!#} 42 echo 43 #!/bin/bash 44 45 echo 46 echo "Using the \$* method: $*" 47 echo 48 echo "Using the \$@ method: $@" 49 #!/bin/bash 50 51 echo 52 count=1 53 for param in "$*" 54 do 55 echo "\$* Parameter #$count = $param" 56 count=$[ $count + 1 ] 57 done 58 echo 59 count=1 60 for param in "$@" 61 do 62 echo "\$@ Parameter #$count = $param" 63 count=$[ $count + 1 ] 64 done 65 #!/bin/bash 66 67 echo 68 count=1 69 while [ -n "$1" ] 70 do 71 echo "Parameter #$count = $1" 72 count=$[ $count + 1 ] 73 shift 74 done 75 #!/bin/bash 76 77 echo 78 echo "The original parameters: $*" 79 shift 2 80 echo "Here's the new first parameter: $1" 81 #!/bin/bash 82 83 echo 84 while [ -n "$1" ] 85 do 86 case "$1" in 87 -a) echo "Found the -a option";; 88 -b) echo "Found the -b option";; 89 -c) echo "Found the -c option";; 90 *) echo "$1 is not an option";; 91 esac 92 shift 93 done 94 95 #!/bin/bash 96 97 echo 98 while [ -n "$1" ] 99 do 100 case "$1" in 101 -a) echo "Found the -a option";; 102 -b) echo "Found the -b option";; 103 -c) echo "Found the -c option";; 104 --) shift 105 break ;; 106 *) echo "$1 is not an option";; 107 esac 108 shift 109 done 110 count=1 111 for param in $@ 112 do 113 echo "Parameter #$count: $param" 114 count=$[ $count + 1 ] 115 done 116 #!/bin/bash 117 118 echo 119 while [ -n "$1" ] 120 do 121 case "$1" in 122 -a) echo "Found the -a option";; 123 -b) param="$2" 124 echo "Fount the -b option, whith parameter value $param" 125 shift ;; 126 -c) echo "Found the -c option";; 127 --) shift 128 break ;; 129 *) echo "$1 is not an option";; 130 esac 131 shift 132 done 133 count=1 134 for param in $@ 135 do 136 echo "Parameter #$count: $param" 137 count=$[ $count + 1 ] 138 done 139 #!/bin/bash 140 141 factorial=1 142 for (( number = 1; number <= $1; number++ )) 143 do 144 factorial=$[ $factorial * $number ] 145 done 146 echo The factorial of $1 is $factorial 147 #!/bin/bash 148 149 echo -n "Enter your name:" 150 read name 151 echo "Hello $name, welcome to my program." 152 #!/bin/bash 153 read -p "Please enter your age:" age 154 days=$[ $age * 365 ] 155 echo "That makes you over $days days old!" 156 #!/bin/bash 157 158 read -n1 -p "Do you want to continue [Y|N]?" answer 159 case $answer in 160 Y|y) echo 161 echo "fine, continue on...";; 162 N|n) echo 163 echo OK, goodbye 164 exit ;; 165 esac 166 echo "This is the end of the script" 167 #!/bin/bash 168 169 read -s -p "Enter your password:" pass 170 echo 171 echo "Is your password readlly $pass" 172 #!/bin/bash 173 174 count=1 175 cat test | while read line 176 do 177 echo "Line $count : $line" 178 count=$[ $count + 1 ] 179 done 180 echo "Finished processing the file" 181 #!/bin/bash 182 183 total=$[ $1 * $2 ] 184 echo The first parameter is $1 185 echo The second parameter is $2 186 echo The total value is $total 187 #!/bin/bash 188 189 echo Hello $1, glad to meet you. 190 #!/bin/bash 191 192 total=$[ ${10} * ${11} ] 193 echo The tenth parameter is ${10} 194 echo The elevent parameter is ${11} 195 echo The total is $total 196 #!/bin/bash 197 198 name=$(basename $0) 199 echo 200 echo The script name is : $name 201 #!/bin/bash 202 203 echo The zero parameter is set to : $0 204 #!/bin/bash 205 206 name=$(basename $0) 207 208 if [ $name = "addem" ] 209 then 210 total=$[ $1 + $2 ] 211 elif [ $name = "multem" ] 212 then 213 total=$[ $1 * $2] 214 fi 215 echo 216 echo The calculated value is $total 217 #!/bin/bash 218 219 if [ -n "$1" ] 220 then 221 echo Hello $1, glad to meet you. 222 else 223 echo "Sorry, you did not identify yourself." 224 fi 225 #!/bin/bash 226 227 echo There were $# parameters supplied. 228 #!/bin/bash 229 230 if [ $# -ne 2 ] 231 then 232 echo 233 echo Usage: test90.sh a b 234 echo 235 else 236 total=$[ $1 + $2] 237 echo 238 echo The total is $total 239 echo 240 fi
1 BB,RR,123 mm s,CC,IL,66666 2 CC,Rw,234 kk e,DD,II,77777 3 4 #!/bin/bash 5 6 exec 1> testout 7 8 echo "aaaaa" 9 echo "bbbbb" 10 echo "ccccc" 11 #!/bin/bash 12 13 exec 2> testerr 14 15 echo "aaaaa" 16 echo "bbbbb" 17 18 exec 1> testout 19 20 echo "ddddd" 21 echo "eeeee" >&2 22 #!/bin/bash 23 24 exec 0< testfile 25 count=1 26 27 while read line 28 do 29 echo "Line #$count : $line" 30 count=$[ $count + 1 ] 31 done 32 This should store in the output file. 33 along with tnis line. 34 #!/bin/bash 35 36 exec 3>&1 37 exec 1>test14out 38 39 echo "This should store in the output file." 40 echo "along with tnis line." 41 42 exec 1>&3 43 44 echo "Now things should be back to normal" 45 #!/bin/bash 46 47 exec 6<&0 48 49 exec 0< testfile 50 51 count=1 52 while read line 53 do 54 echo "Line #$count: $line" 55 count=$[ $count + 1 ] 56 done 57 exec 0<&6 58 read -p "Are you done now?" answer 59 case $answer in 60 Y|y) echo "Goodbye";; 61 N|n) echo "Sorry, this is the end.";; 62 esac 63 #!/bin/bash 64 65 outfile='members.sql' 66 IFS=',' 67 while read lname fname address city state zip 68 do 69 cat >> $outfile << EOF 70 INSERT INTO members (lname,fname,address,city,state,zip) VALUES 71 ('$lname','$fname','$address','$city','$state','$zip'); 72 EOF 73 done < ${1} 74 #!/bin/bash 75 76 echo "This is an error" >&2 77 echo "This is normal output" 78 This is an error 79 eeeee 80 Thu May 9 07:38:06 CST 2019 81 root pts/0 2019-05-09 07:26 (192.168.1.102) 82 ddddd 83 #!/bin/bash 84 85 exec 3<> testfile 86 read line <&3 87 echo "Read: $line" 88 echo "This is a test line"
1 This is a test script 2 Loop #1 3 Loop #2 4 Loop #3 5 Loop #4 6 Loop #5 7 Loop #6 8 Loop #7 9 Loop #8 10 Loop #9 11 Loop #10 12 This si the end of the test script 13 Script process ID:8104 14 Loop #1 15 Loop #2 16 Loop #3 17 Loop #4 18 Loop #5 19 Loop #6 20 Loop #7 21 Loop #8 22 Loop #9 23 Loop #10 24 End of script 25 #!/bin/bash 26 echo "Script process ID:$$" 27 count=1 28 while [ $count -le 10 ] 29 do 30 echo "Loop #$count" 31 sleep 10 32 count=$[ $count + 1 ] 33 done 34 35 echo "End of script" 36 #!/bin/bash 37 38 echo "This script ran at $(date +%B%d,%T)" 39 echo 40 sleep 5 41 echo "This is the script's end...." 42 #!/bin/bash 43 44 trap "echo 'Sorry! I have trapped ctrl+c'" SIGINT 45 46 echo This is a test script 47 count=1 48 while [ $count -le 10 ] 49 do 50 echo "Loop #$count" 51 sleep 1 52 count=$[ $count + 1 ] 53 done 54 echo "This si the end of the test script" 55 #!/bin/bash 56 57 58 trap "echo GOODBYE..." EXIT 59 60 count=1 61 while [ $count -le 5 ] 62 do 63 echo "LOOP #$count" 64 sleep 1 65 count=$[ $count + 1 ] 66 done 67 #!/bin/bash 68 69 trap "echo 'Sorry ... Ctrl + C is trapped.'" SIGINT 70 71 count=1 72 while [ $count -le 5 ] 73 do 74 echo "Loop #$count" 75 sleep 1 76 count=$[ $count + 1 ] 77 done 78 trap "echo 'I modified the trap!' " SIGINT 79 count=1 80 while [ $count -le 5 ] 81 do 82 echo "Secound Loop #$count" 83 sleep 1 84 count=$[ $count + 1 ] 85 done 86 87 trap -- SIGINT 88 echo "I just removed the trap" 89 count=1 90 while [ $count -le 5 ] 91 do 92 echo "remove Loop #$count" 93 sleep 1 94 count=$[ $count + 1 ] 95 done 96 #!/bin/bash 97 98 count=1 99 100 while [ $count -le 10 ] 101 do 102 sleep 1 103 count=$[ $count + 1 ] 104 105 done 106 107 #!/bin/bash 108 echo "start the test script" 109 count=1 110 while [ $count -le 5 ] 111 do 112 echo "Loop #$count" 113 count=$[ $count + 1 ] 114 115 done 116 echo "The scripts is complete"
1 #my script functions 2 3 function addem { 4 echo $[ $1 + $2 ] 5 } 6 7 function multem { 8 echo $[ $1 * $2 ] 9 } 10 11 function divem { 12 if [ $2 -ne 0 ] 13 then 14 echo $[ $1 / $2 ] 15 else 16 echo -1 17 fi 18 } 19 #!/bin/bash 20 21 function testit { 22 local newarray 23 newarray=('echo "$@"') 24 echo "The new array value is: ${newarray[*]}" 25 } 26 27 myarray=(1,2,3,4,5) 28 echo "The original array is ${myarray[*]}" 29 testit ${myarray[*]} 30 #!/bin/bash 31 32 function arraydb1r { 33 local origarray 34 local newarray 35 local elements 36 local i 37 origarray=($(echo "$@")) 38 newarray=($(echo "$@")) 39 elements=$[ $# - 1 ] 40 for (( i = 0; i <= $elements; i++ )) 41 { 42 newarray[$i]=$[ ${origarray[$i]} * 2 ] 43 } 44 echo ${newarray[*]} 45 } 46 47 myarray=(1,2,3,4,5) 48 echo "The origarray array is ${myarray[*]}" 49 arg1=$(echo ${myarray[*]}) 50 result=($(arraydb1r $arg1)) 51 echo "The new array is: ${result[*]}" 52 53 54 #!/bin/bash 55 56 function factorial { 57 if [ $1 -eq 1 ] 58 then 59 echo 1 60 else 61 local temp=$[ $1 -1 ] 62 local result=$(factorial $temp) 63 echo $[ $result * $1 ] 64 fi 65 } 66 67 read -p "Enter value: " value 68 result=$(factorial $value) 69 echo "The factorial of $value is: $result" 70 #!/bin/bash 71 72 . ./myfuncs.sh 73 74 value1=10 75 value2=5 76 77 result1=$(addem $value1 $value2) 78 result2=$(multem $value1 $value2) 79 result3=$(divem $value1 $value2) 80 81 echo "The result of adding them is $result1" 82 echo "The result of multiplying them is $result2" 83 echo "The result of dividing them is $result3" 84 #!/bin/bash 85 86 function test1 { 87 echo "This is an example of a function" 88 89 } 90 91 count=1 92 while [ $count -le 5 ] 93 do 94 test1 95 count=$[ $count + 1 ] 96 done 97 98 echo "This is the end of the loop" 99 test1 100 echo "Now this is the end of the script." 101 #!/bin/bash 102 103 count=1 104 echo "This line comes before the function definition" 105 106 function test1 { 107 echo "This is an example of a function" 108 } 109 110 while [ $count -le 5 ] 111 do 112 test1 113 count=$[ $count + 1 ] 114 done 115 echo "This is the end of the script" 116 test2 117 function test2 { 118 echo "This is an exampple of a function...." 119 } 120 121 #!/bin/bash 122 123 func1() { 124 echo "trying to display a non-existent file." 125 ls -l badfile 126 } 127 echo 128 func1 129 echo "$?" 130 #!/bin/bash 131 132 function db1 { 133 read -p "Enter a value:" value 134 echo $[ $value * 2 ] 135 } 136 137 result=$(db1) 138 echo "The new value is $result" 139 #!/bin/bash 140 141 function db1 { 142 read -p 'Enter a value' value 143 echo "doubling the value" 144 return $[ $value * 2 ] 145 } 146 db1 147 echo "The new value is $?" 148 #!/bin/bash 149 150 function addem { 151 if [ $# -eq 0 ] || [ $# -gt 2 ] 152 then 153 echo -1 154 elif [ $# -eq 1 ] 155 then 156 echo $[ $1 + $1 ] 157 else 158 echo $[ $1 + $2 ] 159 fi 160 } 161 162 echo -n "Adding 10 and 15:" 163 value=$(addem 10 15) 164 echo $value 165 echo -n "Let's try adding just one numnber:" 166 value=$(addem 10) 167 echo $value 168 echo -n "Now trying adding no numbers:" 169 value=$(addem) 170 echo $value 171 echo -n "Finally,try adding three numbers:" 172 value=$(addem 10 15 20) 173 echo $value 174 175 #!/bin/bash 176 177 function func1 { 178 echo $[ $1 * $2 ] 179 180 } 181 182 if [ $# -eq 2 ] 183 then 184 value=$(func1 $1 $2) 185 echo "This result is $value" 186 else 187 "Usage:badtest1 a b" 188 fi 189 #!/bin/bash 190 191 function db1 { 192 value=$[ $value * 2 ] 193 } 194 read -p "Enter a value:" value 195 db1 196 echo "The new value is $value" 197 198 #!/bin/bash 199 200 function func1 { 201 local temp=$[ $value + 5 ] 202 result=$[ $temp * 2 ] 203 } 204 temp=4 205 value=6 206 207 func1 208 echo "The result is $result" 209 if [ $temp -gt $value ] 210 then 211 echo "temp is larger" 212 else 213 echo "temp is smaller" 214 fi
1 /root/#!/bin/bash 2 3 function diskspace { 4 clear 5 df -h 6 } 7 8 function whoseon { 9 clear 10 who 11 } 12 13 function menusage { 14 clear 15 cat /proc/meminfo 16 } 17 18 function menu { 19 clear 20 echo 21 echo -e "\t\t\tSys Admin Menu\n" 22 echo -e "\t1. Display disk space." 23 echo -e "\t2. Display logged on users" 24 echo -e "\t3. Display memory usage" 25 echo -e "\t4. Exit Program\n\n " 26 echo -en "\t\t Enter option: " 27 read -n 1 option 28 } 29 30 while [ 1 ] 31 do 32 menu 33 case $option in 34 0) 35 break ;; 36 1) 37 diskspace ;; 38 2) 39 whoseon ;; 40 3) 41 menusage ;; 42 *) 43 clear 44 echo "Sorry, wrong selection" ;; 45 esac 46 echo -en "\n\n\t\t\tHit any key to continue:" 47 read -n 1 line 48 done 49 clear 50 51 #!/bin/bash 52 53 temp=$(mktemp -t test.XXXXXX) 54 temp2=$(mktemp -t test2.XXXXXX) 55 56 function diskspace { 57 df -h > $temp 58 dialog --textbox $temp 20 60 59 } 60 61 function whoseon { 62 who > $temp 63 dialog --textbox $temp 20 50 64 } 65 66 function memusage { 67 cat /proc/meminfo > $temp 68 dialog --textbox $temp 20 50 69 } 70 71 while [ 1 ] 72 do 73 dialog --menu "Sys Admin Menu" 20 30 10 1 "Display disk space" 2 "Display users" 3 "Display memory usage" 0 "Exit" 2> $temp2 74 if [ $? -eq 1 ] 75 then break 76 fi 77 78 selection=$(cat $temp2) 79 80 case $selection in 81 1) 82 diskspace ;; 83 2) 84 whoseon ;; 85 3) 86 memusage ;; 87 0) 88 break ;; 89 *) 90 dialog --msgbox "Sorry, invalid selection" 10 30 91 esac 92 done 93 rm -rf $temp 2> /dev/null 94 rm -rf $temp2 2> /dev/null 95 96 #!/bin/bash 97 98 function diskspace { 99 clear 100 df -h 101 } 102 103 function whoseon { 104 clear 105 who 106 } 107 108 function menusage { 109 clear 110 cat /proc/meminfo 111 } 112 113 114 115 PS3="Enter option: " 116 select option in "Display disk space" "Display logged on users" "Display memory usage" "Exit Program" 117 do 118 menu 119 case $option in 120 "Exit Program") 121 break ;; 122 "Display disk space") 123 diskspace ;; 124 "Display logged on users") 125 whoseon ;; 126 "Display memory usage") 127 menusage ;; 128 *) 129 clear 130 echo "Sorry, wrong selection" ;; 131 esac 132 done 133 clear 134 135 #!/bin/bash 136 137 138 function menu { 139 clear 140 echo 141 echo -e "\t\t\tSys Admin Menu\n" 142 echo -e "\t1. Display disk space." 143 echo -e "\t2. Display logged on users" 144 echo -e "\t3. Display memory usage" 145 echo -e "\t4. Exit Program\n\n " 146 echo -en "\t\t Enter option: " 147 read -n 1 option 148 } 149 menu 150 case $option in 151 0) 152 break ;; 153 1) 154 diskspace ;; 155 2) 156 whoseon ;; 157 3) 158 menusage ;; 159 *) 160 clear 161 echo "Sorry, wrong selection" ;; 162 esac