Linux 用户，组，权限小练习

更新时间：2022-09-20 15:58:27

1.新建一个没有家目录的用户openstack

2.复制/etc/skel为/home/openstack

3.改变/home/openstack及其内部的文件的属主，属组均为openstack

4./home/openstack及其内部的文件，属组和其他用户没有任何访问权限

[root@localhost ~]# useradd -M openstack

[root@localhost ~]# ls -l /home/openstack

ls: /home/openstack: No such file or directory

[root@localhost ~]# tail -1 /etc/passwd

openstack:x:4005:4005::/home/openstack:/bin/bash

[root@localhost ~]# id openstack

uid=4005(openstack) gid=4005(openstack) groups=4005(openstack) context=root:system_r:unconfined_t:SystemLow-SystemHigh

[root@localhost ~]# finger openstack
Login: openstack                Name: (null)

Directory: /home/openstack              Shell: /bin/bash

Never logged in.
No mail.
No Plan.

[root@localhost ~]# cp -rv /etc/skel /home/openstack

`/etc/skel' -> `/home/openstack'

`/etc/skel/.bashrc' -> `/home/openstack/.bashrc'

`/etc/skel/.bash_logout' -> `/home/openstack/.bash_logout'

`/etc/skel/.bash_profile' -> `/home/openstack/.bash_profile'

[root@localhost ~]# ls -la /home/openstack
total 40
drwxr-xr-x  2 root root 4096 May 16 16:14 .
drwxr-xr-x 28 root root 4096 May 16 16:14 ..
-rw-r--r--  1 root root   24 May 16 16:14 .bash_logout
-rw-r--r--  1 root root  176 May 16 16:14 .bash_profile
-rw-r--r--  1 root root  124 May 16 16:14 .bashrc

[root@localhost ~]# cd /home/openstack

[root@localhost openstack]# ls -la
total 40
drwxr-xr-x  2 root root 4096 May 16 16:14 .
drwxr-xr-x 28 root root 4096 May 16 16:14 ..
-rw-r--r--  1 root root   24 May 16 16:14 .bash_logout
-rw-r--r--  1 root root  176 May 16 16:14 .bash_profile
-rw-r--r--  1 root root  124 May 16 16:14 .bashrc

[root@localhost openstack]# chown -R openstack:openstack .

[root@localhost openstack]# ls -la
total 40
drwxr-xr-x  2 openstack openstack 4096 May 16 16:14 .
drwxr-xr-x 28 root      root      4096 May 16 16:14 ..
-rw-r--r--  1 openstack openstack   24 May 16 16:14 .bash_logout
-rw-r--r--  1 openstack openstack  176 May 16 16:14 .bash_profile
-rw-r--r--  1 openstack openstack  124 May 16 16:14 .bashrc

[root@localhost openstack]# chmod go= .

[root@localhost openstack]# ls -la
total 40
drwx------  2 openstack openstack 4096 May 16 16:14 .
drwxr-xr-x 28 root      root      4096 May 16 16:14 ..
-rw-r--r--  1 openstack openstack   24 May 16 16:14 .bash_logout
-rw-r--r--  1 openstack openstack  176 May 16 16:14 .bash_profile
-rw-r--r--  1 openstack openstack  124 May 16 16:14 .bashrc

[root@localhost openstack]# chmod -R go= .

[root@localhost openstack]# ls -la
total 40
drwx------  2 openstack openstack 4096 May 16 16:14 .
drwxr-xr-x 28 root      root      4096 May 16 16:14 ..
-rw-------  1 openstack openstack   24 May 16 16:14 .bash_logout
-rw-------  1 openstack openstack  176 May 16 16:14 .bash_profile
-rw-------  1 openstack openstack  124 May 16 16:14 .bashrc

[root@localhost openstack]#

结果：

[root@localhost openstack]# su - openstack

[openstack@localhost ~]$ id

uid=4005(openstack) gid=4005(openstack) groups=4005(openstack) context=root:system_r:unconfined_t:SystemLow-SystemHigh

其实上面的过程也揭示了用户创建的过程。

（每一个命令执行完毕后，都应该想办法去验证它！）

本文转自zfz_linux_boy 51CTO博客，原文链接：http://blog.51cto.com/zhangfengzhe/1412919，如需转载请自行联系原作者

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Linux 用户，组，权限小练习

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