Linux logout from console

Linux Logout user / Logoff User Commands

Tutorial details
Difficulty level	Easy
Root privileges	Yes
Requirements	pkill
Est. reading time	2m

a) pkill command – Kill processes by name.

b) kill command – terminate or signal a process.

c) logout command – Logout of a login shell. This command can be used by normal users to end their own session.

logout command syntax and example

If you are logged in as nixcraft user and just wanted to exit a login shell type the following command or hit CTRL+D:
$ logout
You will be logout of a login shell session or secure shell session.

Task: Linux logout all other users

If you would like to logout other users, you must login as root user. Next you need to use the pkill command.

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pkill command syntax

Warning : Do not kill root user or other system level user process. The following example, will kill all process on your server. Do not run the pkill for root user:
pkill -KILL -u root

To see list of logged in user type who or w command:
# who
OR
# w
To logout a user called raj, enter:
# pkill -KILL -u raj
OR
$ sudo pkill -KILL -u raj

See also

• For more information read our previous “Linux kill and logout users” tutorial.
• Man pages: pgrep(1)

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Comments on this entry are closed.

Its one of things i hardly ever remember, never mind that i take the effort to write it down, but if you do need it a post like this is worth a million…
thanks

Works in OpenBSD 4.5 also. Great tip.

Whow, thanks for this posting! Just what I needed, highly appreciated!

Thanks, I was looking for such a command

i want to show the login time and logout time of all users then i will sort it according to their name help me pls…

Thanks a lot!
pkill worked fine in the GUI session!
Regards;

Thanks a lot.
I found here very usefull information about my quistions.
Best regards.

what’s the KILL flag do?

thanks, it works me to kill my locked sessions in a server

Hey, Thanks… This is exactly i requried.

Thanks you buddy….I have seen some of your posts regarding Linux commands. They are very useful for beginners like me.

if i logged twice from putty as same user root then if i want to logout one root user then how i would do it.As same user logged twice then in that case if i kill process of root -user then both will get kill…so is their is any ip based parameter to logout one root ?

Mark! do the work!

Wow. What bad information. Lets say you have root logged in under two sessions.

pkill -KILL -u root

That kills all processes owned by root. Meaning most system processes.

Let’s say you have one user in multiple sessions and that user is not root. Well, you just killed both sessions, even if that’s not what you wanted.

This is terrible advice, and the article should be called “Linux Kill All Processes by User”, and have nothing to do with “logging off”.

how The system should send an email alert when the root user has logged out from ssh/terminal.

@Scott, if you know the better command how to logout the user you could write it here, not just come and start wonder here how bed info that is!

How to identify which roles are running in Linux server by using Command line.

How to remotely GUI access linux gateway server .

I want to be able log multiple users off with a message without shutting down. Any thoughts?

ThanKs, comes handy when dude forgot to log out of his guest session here!

Yeah first time i found a usefull answer to my linux questions, : Ctrl + D
😀

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Linux Kill and Logout Users Command

S how do you kill a Linux user login session? Yet another newbie question that suggests sysadmin/people love to kill and show their power to the rest of the world. There is a package called procps. It includes various useful and nifty utilities. One of such utility is skill which is responsible to send a signal to users and process such as:

• Halt user terminal
• Kill user and logout

Linux Kill and Logout Users Command

The procps package contains utilities to browse the /proc/ filesystem, which is not a real file system but a way for the kernel to provide information about the status of entries in its process table. Procps includes the ps command, free command, skill command, pkill command, pgrep command, snice command, tload command, top command, uptime command, vmstat command, w command, watch command and pwdx command.

WARNING: Do not kill the process owned by the root user (UID 0) or PID 1. Keep in mind that killing necessary processes such as sshd or nfsd or httpd may result in the system downtown. Be careful with all commands. Think twice before entering any of the following commands.

How To Halt/Stop a User Called vivek on Linux

Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following commands. First, switch to the root user by typing the su — and entering the root password, when prompted (you can also use the sudo command if configured on your machine). Type the skill command as follows:
# skill -STOP -u vivek
The skill command sends a terminate command (or another specified signal) to a specified set of processes.

Resume Halted User Called vivek in Liuux

Send CONT single to user vivek, type the following command:
# skill -CONT -u vivek

Kill and Logout a User Called vivek under Linux

You can send KILL single, type the following command:
# skill -KILL -u vivek

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  • How To Set Up SSH Keys With YubiKey as two-factor authentication (U2F/FIDO2)
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  • A podman tutorial for beginners – part I (run Linux containers without Docker and in daemonless mode)
  • How to protect Linux against rogue USB devices using USBGuard

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Kill and Logout All Users

The ultimate command to kill and logout all users is as follows:
# skill -KILL -v /dev/pts/*

The pkill command

To halt or stop a user called vivek, enter:
# pkill -STOP -u vivek
Say you want to resume a user called vivek who was halted previously by the pkill command, enter:
# pkill -CONT -u vivek
Finally kill all php-cgi process owned by vivek user, enter:
# pkill -KILL -u vivek php-cgi

How to kill a Linux login session remotely

We can kill a Linux login session remotely by sending a hangup signal (SIGHUP) to the process running the login session. Typically BASH or KSH shell runs the login session. First, find out your current tty as we need to avoid killing ourselves. Type the tty command and press the [Enter] key:
# tty
Say you want to see all of the running processes of a user named wendy, enter:
# ps -fu
# ps -fu wendy
Look for the PID (process ID) in the second column. The sixth column shows the TTY to which your processes are connected. The last column gives a process name, which is a login shell. Finally, we are going to remove the remote shell. You must look for the shell PID and choose the PID that is not for your current tty and type:
# kill -HUP
# kill -HUP 25250

Other useful nifty utilities provided by procps package

• w command : Show who is logged on and what they are doing.
• kill command : Send signal to a process (explains how to kill process under Linux)
• top command : Display Linux tasks and other important stuff
• vmstat command : Display virtual memory statistics.
• free command : Display free and used memory (RAM) statistics.
• slabtop command : Display kernel slab cache information in real time.

Conclusion

We cannot kill processes that are running on a Linux server other than the one you are logged into right now. For other remote Linux servers first, ssh into that box and run the above commands to kill users and log out of the systems. Set TMOUT to automatically log users out after a period of inactivity. See how to automatically logout BASH / TCSH / SSH users after a period of inactivity for more info.

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How to Log Out from Ubuntu Session [Beginner’s Tip]

Last updated October 29, 2020 By Abhishek Prakash 3 Comments

How do you log out of Ubuntu?

The answer depends on whether you are using Ubuntu server or desktop. I’ll show you steps for both.

Logout Ubuntu from terminal (for server)

If you are using Ubuntu server and you are confined to the terminal screen, you can use the exit command:

Yes. That’s the way to logout from terminal because there is no logout command in Ubuntu or any Linux distribution. You have commands for shutdown Ubuntu but there is no separate log out command.

You may wonder if there is command for shutdown, command for restart then why there is no Linux command for logout?

The answer lies in the way Linux works. You probably know that Linux is only kernel and you need a shell to interact with the kernel. When you use a terminal or if you log in to an Ubuntu system via SSH, you open a shell session.

If you want to logout from your session, you simply exit the shell. This is why the exit command is equivalent to log out command in Linux.

Log out from Ubuntu desktop (GUI method)

If you are using Ubuntu desktop, you have a graphical interface (called desktop environment). You can use your mouse here.

I am showing the screenshot for the default GNOME desktop but if you are using some other Ubuntu desktop variants like Kubuntu, Lubuntu etc, there should also be a logout button or logout option in the power menu.

To log out from Ubuntu desktop session, go to the top right corner and click to bring the system tray. You should see Power Off / Log Out option. Click on it and it will show the Log Out option.

When you click on the Log Out button, it will open a dialogue box and ask for your conformation. If it receives no input from you, you’ll be logged out in 60 seconds.

That’s it. Now that you know how to log off from Ubuntu session let me tell you a secret tip.

You can use Ctrl+Alt+Del keyboard shortcut in Ubuntu to bring the logout menu. Cool, isn’t it?

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