The usermod command is a user management tool to modify user account information like username, user ID, default shell, home directory, and many more. Tutorial Details Description Usermod (Modify User Information) Difficulty Level Moderate Root or Sudo Privileges Yes OS Compatibility Ubuntu, Manjaro, Fedora, etc.
The gpasswd command is used to administer â/etc/groupâ and â/etc/gshadowâ file but that does not give you the complete context. In other words, using the gpasswd command, you can add or remove users from a group, add or remove passwords from a group, promote a
The getent command is used to fetch entries from the administrative text files, also known as databases. The supported databases are ahosts, ahostsv4, ahostsv6, aliases, ethers, group, gshadow, hosts, initgroups, netgroup, networks, passwd, protocols, rpc, services, and shadow. In this article, you will learn how
Every user in Linux is assigned with unique IDs, a.k.a. UIDs, and groups are assigned with group IDs, a.k.a. GIDs; groups can even contain more than one user identity that you can later use to manage users in that group. To know all the usersâ
The Linux system consists of multiple users and groups; there might be a large number of users in your system that can be easily managed by adding them to a specific group. After adding them, you can easily assign different permissions and policies to that
Linux administrators are allowed to create ânormal user accountsâ with a range from 1000 to 60000 uids, where uid 0 is reserved for âroot usersâ and âsystem usersâ are allowed uids from 1 to 999. Normal users might rarely reach this threshold, creating so many
The chage command is identical to the passwd command used to change user account and password expiration information. Using this command, you can list the userâs password information, enable or disable password expiration, set the account expiration date, or force the user to change their
When you create a new user account and set a password for that account, the âpassword expiresâ status is set to never (ex: 0). Apart from that, the âpassword inactiveâ and âaccount expiresâ statuses are also set to never, and your last password change will
The passwd command is used to modify the userâs password and its properties, like deleting the password, expiring the password, deactivating the account, and many more. The owner of an account only has permission to modify its password properties, except for the root user, who
The chown command is used to modify the user and group ownership of files and directories. It will be helpful to restrict the access permissions for files and directories to selective users and members of group. Tutorial Details Description Chown (Change Ownership) Difficulty Level Moderate
The chmod command is used to modify the access permissions of files and directories. It can modify the read, write, and executable permissions, which can help you control shell script execution or specific file modifications. In this article, you will learn how to change referenced
The â/dev/nullâ file is a special file that can be found in all Linux systems. They are also referred to as ânull device filesâ, âvoidâ, and sometimes âa black hole of Linuxâ. There is not any specific role for this file; however, if you redirect
