root 😡 :0 :0 :root :/root :/bin/bash
Account Name: Account Password: Account UID: Account Group GID: User Description: User Home Directory: Shell Interpreter
Small conclusion:
1.useraddAdding users will change /etc/passwd, /etc/shadow, /etc/group, /etc/gshadow
2.passwdSetting the password for the user will change the /etc/shadow
3.groupaddAdding user groups will change /etc/group, /etc/gshadow
last View user login information, /var/log/wtmp data file
lastlog Displays recently logged user information. /var/log/lastlog data file
id View user and group information
ln Create soft and hard link -s soft
du View file and directory size -sh