Day - 11 of DevOps

1. useradd:

• Command: useradd

• Purpose: Adds a new user account to the system.

• Usage: sudo useradd username

  

• Additional Information:

  • It adds a new entry to the /etc/passwd file, which contains basic user information.

    

  • Password-related information is stored in the /etc/shadow file.

    

2. adduser:

• Command: adduser

• Purpose: A higher-level utility, often a Perl script, that interacts with useradd to provide a more user-friendly and interactive way to create users.

• Usage: sudo adduser username

• Additional Information:

  • It also manages the user's home directory and initial settings.

  • Helps in setting up the user's environment, including the home directory and shell.

    

    

Files related to user management:

• /etc/passwd: Contains basic user information, such as user IDs, group IDs, home directories, and login shells.

  

• /etc/shadow: Stores encrypted password information for users.

  • Accessible only by the root user.

  • Enhances security by keeping sensitive information separate.

    

3. groupadd:

• Command: groupadd

• Purpose: Creates a new group on the system.

• Usage: sudo groupadd groupname

• Additional Information:

  • It adds a new entry to the /etc/group file, containing group information.

  • Group password-related information is stored in the /etc/gshadow file.

    

Files related to group management:

• /etc/group: Contains information about groups on the system.

  

• /etc/gshadow: Stores group password information.