magedu-第四周作业

1、显示/etc目录下，以非字母开头，后面跟了一个字母以及其它任意长度任意字符的文件或目录

[root@centos_1 ~]# ll /etc/[^a-z]*
-rw-r--r-- 1 root root 0 Oct 13 22:18 /etc/1test
[root@centos_1 ~]# ll /etc/[^a-z][a-z]*
-rw-r--r-- 1 root root 0 Oct 13 22:18 /etc/1test
[root@centos_1 ~]# 

2、复制/etc目录下所有以p开头，以非数字结尾的文件或目录到/tmp/mytest1目录中。

[root@centos_1 mytest1]# cp -r /etc/p[^0-9] /tmp/mytest1/
[root@centos_1 mytest1]# ll
total 0
drwxr-xr-x 5 root root 52 Oct 13 22:24 pm
[root@centos_1 mytest1]# pwd
/tmp/mytest1
[root@centos_1 mytest1]# 

3、将/etc/issue文件中的内容转换为大写后保存至/tmp/issue.out文件中

[root@centos_1 mytest1]# cat /etc/issue
\S
Kernel \r on an \m

[root@centos_1 mytest1]# cat /etc/issue | tr '[a-z]' '[A-Z]' >>/tmp/issue.out
[root@centos_1 mytest1]# cat /tmp/issue.out
\S
KERNEL \R ON AN \M

[root@centos_1 mytest1]# 

4、请总结描述用户和组管理类命令的使用方法并完成以下练习：
   (1)、创建组distro，其GID为2019；

[root@centos_1 mytest1]# cat /etc/group | grep distro
distro:x:2019:
[root@centos_1 mytest1]# groupadd distro -g 2019

   (2)、创建用户mandriva, 其ID号为1005；基本组为distro；

[root@centos_1 mytest1]# useradd mandriva -u 1005 -g distro
[root@centos_1 mytest1]# tail /etc/passwd
tcpdump:x:72:72::/:/sbin/nologin
ntp:x:38:38::/etc/ntp:/sbin/nologin
saslauth:x:997:76:Saslauthd user:/run/saslauthd:/sbin/nologin
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
zabbix:x:996:995:Zabbix Monitoring System:/var/lib/zabbix:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
tom:x:5001:5001::/tmp/tom:/bin/zsh
help:x:5002:5002::/home/help:/bin/bash
mandriva:x:1005:2019::/home/mandriva:/bin/bash

   (3)、创建用户mageia，其ID号为1100，家目录为/home nux;

[root@centos_1 mytest1]# useradd mageia -u 1100  -d /homenux
[root@centos_1 mytest1]# tail /etc/passwd
ntp:x:38:38::/etc/ntp:/sbin/nologin
saslauth:x:997:76:Saslauthd user:/run/saslauthd:/sbin/nologin
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
zabbix:x:996:995:Zabbix Monitoring System:/var/lib/zabbix:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
tom:x:5001:5001::/tmp/tom:/bin/zsh
help:x:5002:5002::/home/help:/bin/bash
mandriva:x:1005:2019::/home/mandriva:/bin/bash
mageia:x:1100:1100::/homenux:/bin/bash

   (4)、给用户mageia添加密码，密码为mageedu，并设置用户密码7天后过期

[root@centos_1 mytest1]# passwd  -x  7 mageia 
Adjusting aging data for user mageia.
passwd: Success
[root@centos_1 mytest1]# passwd -S mageia
mageia LK 2019-10-13 0 7 7 -1 (Password locked.)
[root@centos_1 mytest1]# passwd mageia
Changing password for user mageia.
New password: 
BAD PASSWORD: The password is shorter than 8 characters
Retype new password: 
passwd: all authentication tokens updated successfully.
[root@centos_1 mytest1]# passwd -S mageia
mageia PS 2019-10-13 0 7 7 -1 (Password set, SHA512 crypt.)
[root@centos_1 mytest1]# 

   (5)、删除mandriva，但保留其家目录；

[root@centos_1 mytest1]# userdel  mandriva
[root@centos_1 mytest1]# ll /home/mandriva/
total 0
[root@centos_1 mytest1]# ll /home
total 0
drwx------ 2 help help   62 Oct 13 22:42 help
drwx------ 2 1005 distro 62 Oct 13 23:14 mandriva
[root@centos_1 mytest1]# 

   (6)、创建用户slackware，其ID号为2002，基本组为distro，附加组peguin；

[root@centos_1 mytest1]# groupadd peguin
[root@centos_1 mytest1]# useradd slackware -u 2002 -g distro -G peguin
[root@centos_1 mytest1]# tail /etc/passwd
ntp:x:38:38::/etc/ntp:/sbin/nologin
saslauth:x:997:76:Saslauthd user:/run/saslauthd:/sbin/nologin
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
zabbix:x:996:995:Zabbix Monitoring System:/var/lib/zabbix:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
tom:x:5001:5001::/tmp/tom:/bin/zsh
help:x:5002:5002::/home/help:/bin/bash
mageia:x:1100:1100::/homenux:/bin/bash
slackware:x:2002:2019::/home/slackware:/bin/bash
[root@centos_1 mytest1]# 

   (7)、修改slackware的默认shell为/bin/tcsh；

[root@centos_1 mytest1]# usermod slackware -s /bin/tcsh
[root@centos_1 mytest1]# tail /etc/passwd
ntp:x:38:38::/etc/ntp:/sbin/nologin
saslauth:x:997:76:Saslauthd user:/run/saslauthd:/sbin/nologin
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
zabbix:x:996:995:Zabbix Monitoring System:/var/lib/zabbix:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
tom:x:5001:5001::/tmp/tom:/bin/zsh
help:x:5002:5002::/home/help:/bin/bash
mageia:x:1100:1100::/homenux:/bin/bash
slackware:x:2002:2019::/home/slackware:/bin/tcsh
[root@centos_1 mytest1]# 

   (8)、为用户slackware新增附加组admins； 

[root@centos_1 mytest1]# groupadd admins
[root@centos_1 mytest1]# usermod slackware  -G admins
[root@centos_1 mytest1]# tail /etc/passwd
ntp:x:38:38::/etc/ntp:/sbin/nologin
saslauth:x:997:76:Saslauthd user:/run/saslauthd:/sbin/nologin
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
zabbix:x:996:995:Zabbix Monitoring System:/var/lib/zabbix:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
tom:x:5001:5001::/tmp/tom:/bin/zsh
help:x:5002:5002::/home/help:/bin/bash
mageia:x:1100:1100::/homenux:/bin/bash
slackware:x:2002:2019::/home/slackware:/bin/tcsh
[root@centos_1 mytest1]# cat /etc/group | grep admins
admins:x:5004:slackware
[root@centos_1 mytest1]#