How to use the Linux usermod command

Usermod can be used to modify user account settings.

Syntax

Usermod [-LU] [-c <remarks>] [-d <logon Directory>] [-e <validity period>] [-f <buffer days>] [-g <group>]

[-G <GROUP>] [-l <account name>] [-s <shell>] [-u <uid>] [user account]

Parameter description:

• -C <remarks> modify the remarks of the user account.
• -D logon Directory> modify the directory when a user logs in.
• -E <validity period> modifies the validity period of an account.
• -F <buffer days> change the number of days after the password expires to close the account.
• -G <GROUP>: modify the group to which the user belongs.
• -G <GROUP> modify the additional group to which the user belongs.
• -L <account name> modify the user account name.
• -L lock the user password to make it invalid.
• -S <shell> modify the shell used after the user logs on.
• -U <uid> modify the user ID.
• -U unlocks the password.

Instance

Change logon Directory

# Usermod-d/home/hnlinux root

Change User uid

# Usermod-u 777 root