Linux command
usermod 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Example
sudo usermod -l new_username username
Example
sudo usermod -u 1001 username
Example
sudo usermod -s /bin/zsh username
Add
sudo usermod -aG group1,group2 username
Set
sudo usermod -G group1,group2 username
Example
sudo usermod -m -d /new/home username
Lock
sudo usermod -L username
Unlock
sudo usermod -U username
说明
usermod modifies system account files to change user account attributes. It can update username, user ID, groups, home directory, shell, and account status.
参数
- -a, --append
- Append to supplementary groups (use with -G)
- -c, --comment COMMENT
- Change the comment field (GECOS)
- -d, --home HOME_DIR
- Set new home directory
- -e, --expiredate DATE
- Set account expiration date (YYYY-MM-DD)
- -f, --inactive DAYS
- Days after password expires until account disabled
- -g, --gid GROUP
- Change primary group
- -G, --groups GROUP1,GROUP2
- Set supplementary groups (replaces existing)
- -l, --login NEW_LOGIN
- Change username
- -L, --lock
- Lock the user account
- -m, --move-home
- Move home directory contents to new location
- -o, --non-unique
- Allow non-unique UID when used with -u
- -p, --password PASSWORD
- Set encrypted password (as returned by crypt(3))
- -s, --shell SHELL
- Change login shell
- -u, --uid UID
- Change user ID
- -U, --unlock
- Unlock the user account
- -Z, --selinux-user SEUSER
- Set SELinux user mapping
FAQ
What is the usermod command used for?
usermod modifies system account files to change user account attributes. It can update username, user ID, groups, home directory, shell, and account status.
How do I run a basic usermod example?
Run `sudo usermod -l new_username username` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -a, --append do in usermod?
Append to supplementary groups (use with -G)