自我学习笔记03

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@localhost data]#ls -a /etc/ |egrep ^[^[:alpha:]][[:alpha:]].*
.java
.pwd.lock
.updated

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@localhost data]#mkdir /tmp/mytest1
[root@localhost data]#cp -a /etc/p*[a-z] /tmp/mytest1/
[root@localhost data]#ls -a /tmp/mytest1
.      passwd        pki       pnm2ppa.conf  ppp             profile    pulse
..     pbm2ppa.conf  plymouth  popt.d        prelink.conf.d  profile.d  purple
pam.d  pinforc       pm        postfix       printcap        protocols  python

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@localhost ~]#cat /etc/issue
\S
Kernel \r on an \m
[root@localhost ~]#cat /etc/issue|tr -s [[:lower:]] [[:upper:]] >/tmp/issue.out
[root@localhost ~]#cat /tmp/issue.out 
\S
KERNEL \R ON AN \M

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:

用户和组 (2)

   (1)、创建组distro,其GID为2019;

创建组用户groupadd -g表示指定GID

[root@localhost ~]#groupadd –g 2019 distro

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

首先创建一个组distro,然后创建用户为其指定UID和基本组

[root@localhost ~]#groupadd distro;useradd -u 1005 -g distro mandriva
[root@localhost ~]#id mandriva
uid=1005(mandriva) gid=2019(distro) groups=2019(distro)
[root@localhost ~]#getent passwd|grep mandriva
mandriva:x:1005:2019::/home/mandriva:/bin/bash

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

[root@localhost ~]#useradd -u 1100 -d /home/linux mageia
[root@localhost ~]#id mageia
uid=1100(mageia) gid=1100(mageia) groups=1100(mageia)
[root@localhost ~]#cat /etc/passwd |grep mageia
mageia:x:1100:1100::/home/linux:/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@localhost ~]#echo mageedu |passwd --stdin mageia
Changing password for user mageia.
passwd: all authentication tokens updated successfully.
[root@localhost ~]#date +"%F"
2019-11-14
[root@localhost ~]#usermod -e `date -d 1weeks +%F` mageia
[root@localhost ~]#getent shadow mageia
mageia:$6$RK2orLDx$LIR17eBFYOKkDyn6d7bxsUSpUPYMjfFZSH5fAVN282XXpXIon3WpPRMN6tHSDdKMEh/Weom7rjRTtOmQcZjnn0:18214:0:99999:7::18221:

   (5)、删除mandriva,但保留其家目录;

[root@localhost ~]#id mandriva
uid=1005(mandriva) gid=2019(distro) groups=2019(distro)
[root@localhost ~]#userdel mandriva 
[root@localhost ~]#ls /home/
git  linux  mandriva  mysql  nginx  varnish  wang

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

[root@localhost ~]#groupadd peguin
[root@localhost ~]#useradd -u 2002 -g distro -G peguin slackware
[root@localhost ~]#id slackware
uid=2002(slackware) gid=2019(distro) groups=2019(distro),2020(peguin)

   (7)、修改slackware的默认shell为/bin/tcsh;

[root@localhost ~]#getent passwd slackware
slackware:x:2002:2019::/home/slackware:/bin/bash
[root@localhost ~]#usermod -s /bin/tcsh slackware
[root@localhost ~]#getent passwd slackware
slackware:x:2002:2019::/home/slackware:/bin/tcsh

   (8)、为用户slackware新增附加组admins;

[root@localhost ~]#groupadd admins
[root@localhost ~]#groupmems -a slackware -g admins
[root@localhost ~]#id slackware
uid=2002(slackware) gid=2019(distro) groups=2019(distro),2020(peguin),2021(admins)
posted @ 2019-11-12 02:04  Ronald_Wang  阅读(143)  评论(0编辑  收藏  举报