C Advanced/Day3

 

 

#!/bin/bash 
#姓名:小栗子 脚本名称:myfirstshell 目的:您好
arr=`whoami`
echo "hello:"$arr  #和当前用户说hello
echo "hostname:`hostname`"
brr=`ls ../`
echo ${crr[*]}
echo $PATH $HOME
str1=`df -h`
echo $str1
str2=`id -g`
echo $str2
echo "Good bye:"$arr

#!/bin/bash 
A=`ls /etc |wc -l`
B=`ls /var |wc -l`
C=`ls /usr |wc -l`
let sum=A+B+C
echo $sum

#!/bin/bash 
arr=`whoami` #获取当前用户
echo "当前用户名:"$arr
 #用户id
echo "当前用户id:"id -u
crr=`pwd`
echo "当前工作路径:"$crr   #工作路径

cout=$(sudo find /etc -type f -name "P*" -o -name "p*" | grep -c "")
echo "文件个数为:"$cout

#******方法二*****
arr=(`ls /etc | grep "^p" -i `)
echo ${ #arr[*]}

#!/bin/bash 

read -p "请输入一个文件名" filename

if [ -f $filename ]
then
	echo "是普通文件"
elif
	echo "不是普通文件"
fi