Introduction
shadow includes the following tools:
| chage (1) | change user password expiry information |
| chfn (1) | change real user name and information |
| chsh (1) | change login shell |
| expiry (1) | check and enforce password expiration policy |
| gpasswd (1) | administer the /etc/group file |
| login (1) | begin session on the system |
| newgrp (1) | log in to a new group |
| passwd (1) | change user password |
| sg (1) | execute command as different group ID |
| su (1) | change user ID or become superuser |
| faillog (5) | login failure logging file |
| gshadow (5) | shadowed group file |
| login.defs (5) | shadow password suite configuration |
| passwd (5) | the password file |
| shadow (5) | encrypted password file |
| chgpasswd (8) | update group passwords in batch mode |
| chpasswd (8) | update passwords in batch mode |
| faillog (8) | display faillog records or set login failure limits |
| groupadd (8) | create a new group |
| groupdel (8) | delete a group |
| groupmod (8) | modify a group definition on the system |
| grpck (8) | verify integrity of group files |
| grpconv (8) | convert to and from shadow passwords and groups |
| grpunconv (8) | convert to and from shadow passwords and groups |
| lastlog (8) | reports the most recent login of all users or of a given user |
| newusers (8) | update and create new users in batch |
| nologin (8) | politely refuse a login |
| pwck (8) | verify integrity of password files |
| pwconv (8) | convert to and from shadow passwords and groups |
| pwunconv (8) | convert to and from shadow passwords and groups |
| useradd (8) | create a new user or update default new user information |
| userdel (8) | delete a user account and related files |
| usermod (8) | modify a user account |
| vigr (8) | edit the password, group, shadow-password or shadow-group file |
| vipw (8) | edit the password, group, shadow-password or shadow-group file |