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  • Linux 命令笔记(1)

    [root@Oracle11_2 ~]# ll
    total 268
    -rw-------. 1 root root   1090 May  3 09:35 anaconda-ks.cfg
    drwxr-xr-x. 3 root root   4096 May 21 16:24 backup
    drwxr-xr-x  2 root root   4096 May 22 12:24 Desktop
    drwxr-xr-x  2 root root   4096 May 22 12:24 Documents
    drwxr-xr-x  2 root root   4096 May 22 12:24 Downloads
    -rw-r--r--. 1 root root   8823 May  3 09:35 install.log
    -rw-r--r--. 1 root root   3384 May  3 09:34 install.log.syslog
    drwxr-xr-x  2 root root   4096 May 22 12:24 Music
    -rw-r--r--  1 root root 210877 Aug 22  2012 pdksh-5.2.14-37.el5_8.1.x86_64.rpm
    drwxr-xr-x  2 root root   4096 May 22 12:24 Pictures
    drwxr-xr-x  2 root root   4096 May 22 12:24 Public
    drwxr-xr-x. 2 root root   4096 May  4 10:17 scripts
    drwxr-xr-x  2 root root   4096 May 22 12:24 Templates
    drwxr-xr-x  2 root root   4096 May 22 12:24 Videos

    用户读取目录的权限应该是5(r-x) 而不是 4(r--) ,x意味着有在目录下执行命令的权限。
    [root@Oracle11_2 ~]# useradd backup
    [root@Oracle11_2 ~]# useradd jingy
    [root@Oracle11_2 ~]# su - backup
    [backup@Oracle11_2 ~]$ id
    uid=501(backup) gid=503(backup) groups=503(backup)
    [backup@Oracle11_2 ~]$ exit
    logout
    [root@Oracle11_2 ~]# su - jingy
    [jiongy@Oracle11_2 ~]$ id
    uid=502(jingy) gid=504(jingy) groups=504(jingy)
    [jiongy@Oracle11_2 ~]$ exit
    logout
    [root@Oracle11_2 ~]# usermod -a -G backup jingy
    [root@Oracle11_2 ~]# su - jingy
    [jiongy@Oracle11_2 ~]$ id
    uid=502(jiongy) gid=504(jingy) groups=504(jingy),503(backup)
    [jiongy@Oracle11_2 ~]$ id
    uid=502(jiongy) gid=504(jingy) groups=504(jingy),503(backup)

    usermod -G backup jingy #修改用户次要组信息
    usermod -a -G backup jingy #将用户添加到新的次要组中
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  • 原文地址:https://www.cnblogs.com/storymedia/p/4551064.html
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