Linux – Page 66 – POFTUT

Category: Linux

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Which Groups Belong To A User In Linux

How to find the user or myself belongs to which group? Because group is important for the folder and device access permissions. One user can be join multiple or single group. We can get our current group membership or another user group membership. Who Am I? First when we log in a system we may want to get our username and user account related information. We will use whoami command....

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How To Logoff User Forcibly in Linux?

We have some servers to manage. There are some user access to our server. We want to them log off or kill their processes by terminating. How can be achieve this? List Logged On Users We can logout other users forcibly like below. Keep in mind we need to be root to complete this command. First we will list currently logged in users with the who command. We can use...

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How To Change or Rename Username and User ID In Linux?

The problem is we want to change the already created user name or user id. As we know there is a lot of configuration those rely on the user id like permissions. We will use usermod command to make this change. Keep in mind this changes will effects system wide. List User Info Before starting to big changes we will list users detailed info with cat command like below.

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How To Set or Change User Password In Linux?

Linux passwords are used to authenticate users. Linux passwords was hold in /etc/passwd file with other user related information like default shell, home directory path etc. Now in modern Linux distributions holds passwords in /etc/shadow file which have restricted access. This file holds user passwords as hash values with salt. Hashing and salting makes passwords more secure. Change Current User Password To change a user password we need password change...

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How To Add A User To A Group?

In Linux users may have different groups registered. By default adding a user to the Linux system will create new user. There are different commands to change user group one of them is useradd which actually create new user and sets given group to the newly created user. As always we need root privileges to change user group. List Users Before starting to add user into a group we will...

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How To Delete Remove User Accounts In Linux?

How can I remove a Linux user account from Linux system. As you know user management in Linux requires root privileges. While removing user his home directory can be remove or preserved. As same with mail box. User mailbox can be preserved. List Existing Accounts Before removing or deleting an user account checking the existing of account can be useful. We can check whether given account exist with different ways. In...

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How To Disable or Lock Linux User Account?

How can I disable some Linux account? By disabling it I do not want to remove the account and related files. Just user related operations will be prevented. If an user authentication occurs it will be not authenticated. We will use usermod command to lock user account. Disable/Lock User Account with usermod Command We will disable account with the following code.

usermod will change user account related attributes and information. -L will lock...

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