gshadow

View gshadow (requires root)

$ sudo cat /etc/gshadow

$ sudo vigr -s

$ sudo grpck

/etc/gshadow contains encrypted group passwords and group administrator information. It is the shadow file for /etc/group, restricting access to sensitive group information.
Each line follows the format: groupname:password:admins:members. The password field uses * for no password set, ! for password disabled, or an encrypted hash like $6$ for SHA-512.
Group administrators listed in the admins field can add/remove members and change the group password without root privileges using gpasswd.

Administrators can add/remove members and change the group password without root privileges using gpasswd.

File permissions must be 0640 or stricter. Edit with vigr -s to prevent corruption. Not all systems use gshadow. Group passwords are rarely used.

group(5), shadow(5), gpasswd(1), grpck(8)