linux系统用户管理与grep正则表达式示例教程

前言

本文主要给大家介绍了关于linux系统用户管理与grep正则表达式的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

linux系统用户管理与grep正则表达式

1、复制/etc/skel目录为/home/tuser1，要求/home/tuser1及其内部文件的属组和其它用户均没有任何访问权限。

[root@suywien ~]# cp -rpv /etc/skel/ /home/tuser1/
‘/etc/skel/' -> ‘/home/tuser1/'
‘/etc/skel/.mozilla' -> ‘/home/tuser1/.mozilla'
‘/etc/skel/.mozilla/extensions' -> ‘/home/tuser1/.mozilla/extensions'
‘/etc/skel/.mozilla/plugins' -> ‘/home/tuser1/.mozilla/plugins'
‘/etc/skel/.bash_logout' -> ‘/home/tuser1/.bash_logout'
‘/etc/skel/.bash_profile' -> ‘/home/tuser1/.bash_profile'
‘/etc/skel/.bashrc' -> ‘/home/tuser1/.bashrc'
[root@suywien ~]# useradd tuser -d /home/tuser1/
useradd: warning: the home directory already exists.
Not copying any file from skel directory into it.
[root@suywien ~]# chmod -R go-rwx /home/tuser1/
[root@suywien ~]# ll -d /home/tuser1/
drwx------ 3 root root 74 Feb 12 03:04 /home/tuser1/

2、编辑/etc/group文件，添加组hadoop。

[root@suywien ~]# vim /etc/group
[root@suywien ~]# tail -1 /etc/group
hadoop:x:1029

3、手动编辑/etc/passwd文件新增一行，添加用户hadoop，其基本组ID为hadoop组的id号；其家目录为/home/hadoop。

[root@suywien ~]# vim /etc/passwd
[root@suywien ~]# tail -1 /etc/passwd
hadoop:x:1029:1029::/home/hodoop/:/bin/bash

4、复制/etc/skel目录为/home/hadoop，要求修改hadoop目录的属组和其它用户没有任何访问权限。

[root@suywien ~]# cp -fpv /etc/skel/ /home/hadoop
cp: omitting directory ‘/etc/skel/'
[root@suywien ~]# cp -fpvR /etc/skel/ /home/hadoop
‘/etc/skel/' -> ‘/home/hadoop'
‘/etc/skel/.mozilla' -> ‘/home/hadoop/.mozilla'
‘/etc/skel/.mozilla/extensions' -> ‘/home/hadoop/.mozilla/extensions'
‘/etc/skel/.mozilla/plugins' -> ‘/home/hadoop/.mozilla/plugins'
‘/etc/skel/.bash_logout' -> ‘/home/hadoop/.bash_logout'
‘/etc/skel/.bash_profile' -> ‘/home/hadoop/.bash_profile'
‘/etc/skel/.bashrc' -> ‘/home/hadoop/.bashrc'
[root@suywien ~]# chmod go-rwx /home/hadoop/
[root@suywien ~]# ls -ld /home/hadoop/
drwx------ 3 root root 74 Feb 12 03:04 /home/hadoop/

5、修改/home/hadoop目录及其内部所有文件的属主为hadoop，属组为hadoop。

[root@suywien ~]# chown -R hadoop:hadoop /home/hadoop/
[root@suywien ~]# ll -al /home/hadoop/
total 16
drwx------ 3 hadoop hadoop 74 Feb 12 03:04 .
drwxr-xr-x. 10 root root 4096 Mar 25 10:14 ..
-rw-r--r-- 1 hadoop hadoop 18 Nov 20 2015 .bash_logout
-rw-r--r-- 1 hadoop hadoop 193 Nov 20 2015 .bash_profile
-rw-r--r-- 1 hadoop hadoop 231 Nov 20 2015 .bashrc
drwxr-xr-x 4 hadoop hadoop 37 Feb 12 03:03 .mozilla