Passwd
| Field |
Description |
| Username |
Used when user logs in. Must be between 1 and 32 characters in length. |
| Password |
An x character indicates that an encrypted and salted password is stored in the /etc/shadow file. Use the passwd command to compute or update the password hash. |
| User ID (UID) |
Each user must be assigned a UID. UID 0 is reserved for root, UIDs 1-99 are reserved for predefined accounts, and UIDs 100-999 are reserved for system accounts/groups. |
| Group ID (GID) |
The primary group ID, stored in the /etc/group file. |
| User ID Info (GECOS) |
The comment field for extra information about the user, such as full name or phone number. This field is used by the finger command. |
| Home Directory |
The absolute path to the user’s home directory. If it does not exist, the user’s directory becomes /. |
| Command/Shell |
The absolute path of a command or shell (e.g., /bin/bash). It does not have to be a shell; for example, /sbin/nologin can be used to prevent direct login. |
Geting an entry
Getent
getent passwd {user1} {user2}