Vipw

Password files on Linux are used to store user details, like your unique user ID and name. It defines who you are on the system, your access to files, and the permissions you have. Proper password management, together with file integrity of your password files, is important. It keeps your system and user accounts safe. Password Files For most Linux distributions there are two related files available: /etc/passwd and /etc/shadow. The first file defines what local users are available on the system.