Linux 用户，组，权限小练习

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，属组和其余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建立的过程。

（每个命令执行完毕后，都应该想办法去验证它！）