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# Linux usermod Command [ Linux Command Manual](#) The Linux usermod command is used to modify a user account. usermod can be used to modify various settings of a user account. ### Syntax usermod **Parameter Description**: * -c Modify the comment field of the user account. * -d Modify the user's home directory. * -e Modify the account expiry date. * -f Modify the number of days after password expiration before the account is disabled. * -g Modify the user's primary group. * -G Modify the user's supplementary groups. * -l Modify the user account name. * -L Lock the user's password, making it invalid. * -s Modify the shell used after user login. * -u Modify the user ID. * -U Unlock the password. ### Examples Change the login directory # usermod -d /home/hnlinux root Change the user's uid # usermod -u 777 root [ Linux Command Manual](#)