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Ubuntu添加用户

Ubuntu添加用户

作者: 我是任玉琢 | 来源:发表于2016-07-16 16:44 被阅读241次
    $ useradd
    Usage: useradd [options] LOGIN
           useradd -D
           useradd -D [options]
    
    Options:
      -b, --base-dir BASE_DIR       base directory for the home directory of the
                                    new account
      -c, --comment COMMENT         GECOS field of the new account
      -d, --home-dir HOME_DIR       home directory of the new account
      -D, --defaults                print or change default useradd configuration
      -e, --expiredate EXPIRE_DATE  expiration date of the new account
      -f, --inactive INACTIVE       password inactivity period of the new account
      -g, --gid GROUP               name or ID of the primary group of the new
                                    account
      -G, --groups GROUPS           list of supplementary groups of the new
                                    account
      -h, --help                    display this help message and exit
      -k, --skel SKEL_DIR           use this alternative skeleton directory
      -K, --key KEY=VALUE           override /etc/login.defs defaults
      -l, --no-log-init             do not add the user to the lastlog and
                                    faillog databases
      -m, --create-home             create the user's home directory
      -M, --no-create-home          do not create the user's home directory
      -N, --no-user-group           do not create a group with the same name as
                                    the user
      -o, --non-unique              allow to create users with duplicate
                                    (non-unique) UID
      -p, --password PASSWORD       encrypted password of the new account
      -r, --system                  create a system account
      -R, --root CHROOT_DIR         directory to chroot into
      -s, --shell SHELL             login shell of the new account
      -u, --uid UID                 user ID of the new account
      -U, --user-group              create a group with the same name as the user
      -Z, --selinux-user SEUSER     use a specific SEUSER for the SELinux user mapping
    
    $ sudo useradd -g group -s /bin/bash -m username #group表示用户组(例如:root,新建用户用户名:username)
    $ sudo passwd username
    Enter new UNIX password:
    Retype new UNIX password:
    

    给用户添加执行sudo命令权限,不添加权限执行时可能报错如下:

    *** is not in the sudoers file.This incident will be reported.
    
    $ su root
    $ chmod u+x /etc/sudoers #添加sudo文件写权限
    $ vim /etc/sudoers #在root ALL=(ALL) ALL下添加
    root   ALL=(ALL)      ALL # 可参考下文补充说明
    $ chmod u-w /etc/sudoers #撤销sudo文件写权限
    

    youuser ALL=(ALL) ALL
    %youuser ALL=(ALL) ALL
    youuser ALL=(ALL) NOPASSWD:ALL
    %youuser ALL=(ALL) NOPASSWD:ALL

    第一行:允许用户youuser执行sudo命令(需要输入密码).
    第二行:允许用户组youuser里面的用户执行sudo命令(需要输入密码).
    第三行:允许用户youuser执行sudo命令,并且在执行的时候不输入密码.
    第四行:允许用户组youuser里面的用户执行sudo命令,并且在执行的时候不输入密码.

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