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usermod

Created by : Mr Dk.

2023 / 01 / 14 23:56

Hangzhou, Zhejiang, China


Background

usermod 用于修改用户属性。与用户相关的属性通常保存在 /etc/ 下,比如 /etc/passwd 中。usermod 命令将会修改这些文件。

Usage

usermod 一般需要使用超级用户权限来执行:

$ sudo usermod -h
Usage: usermod [options] LOGIN

Options:
  -c, --comment COMMENT         new value of the GECOS field
  -d, --home HOME_DIR           new home directory for the user account
  -e, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE
  -f, --inactive INACTIVE       set password inactive after expiration
                                to INACTIVE
  -g, --gid GROUP               force use GROUP as new primary group
  -G, --groups GROUPS           new list of supplementary GROUPS
  -a, --append                  append the user to the supplemental GROUPS
                                mentioned by the -G option without removing
                                him/her from other groups
  -h, --help                    display this help message and exit
  -l, --login NEW_LOGIN         new value of the login name
  -L, --lock                    lock the user account
  -m, --move-home               move contents of the home directory to the
                                new location (use only with -d)
  -o, --non-unique              allow using duplicate (non-unique) UID
  -p, --password PASSWORD       use encrypted password for the new password
  -R, --root CHROOT_DIR         directory to chroot into
  -s, --shell SHELL             new login shell for the user account
  -u, --uid UID                 new UID for the user account
  -U, --unlock                  unlock the user account
  -Z, --selinux-user SEUSER     new SELinux user mapping for the user account

修改 HOME 目录

使用 -d 参数可以修改用户的 HOME 目录:

sudo usermod -d /home/another mrdrivingduck

修改用户所属的用户组

使用 -g 参数:

sudo usermod -g some_group mrdrivingduck

修改用户使用的 Shell

使用 -s 参数:

sudo usermod -s /bin/zsh mrdrivingduck

修改用户 ID

使用 -u 参数:

sudo usermod -u 1234 mrdrivingduck

References

usermod command in Linux with Examples

usermod(8) — Linux manual page

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