screen is this awesome software tool in Linux that provides you the ability to spring-up and use multiple shell sessions from a single ssh session. Screen essentially acts as a terminal multiplexer emulator that is packed with features (just look at the size of its
man page, you'll know 😝)
A few key benefits of
- Leverage the use of multiplexer to create multiple shell windows from a single shell SSH session
- Re-establish access and control of the shell session through network disruptions
- Ability to disconnect and re-connect to a shell session from any system
- Ability to daemonize a session to keep a long-running process and attach to the session whenever needed
Honestly, the above ☝ are just a few examples. There are many
How to Install It?
It is most likely already have
screen installed on your system. To check if you already have it installed you can use the
which command to inspect the path of
screen on your system.
If you don’t have
screen, then you can easily install it using
yum on CentOS
sudo yum install screen
or on Debian using
sudo apt install screen
or on Manjaro using
sudo pacman -Sy screen
or on Fedora using
sudo dnf install screen
Once, you have successfully installed it you can check using the
which command again. Alternatively, you can run the
It should prompt you a new window within the screen
How to Use It?
To get started just use your command line and simply type as shown below:
You’ll see a page of legal information. You can now press Space or Enter to go to the command prompt.
🤔 Hmmm, you seem to have returned to you your normal session and nothing seems to have happened. But surprise-surprise, you’re now running a shell inside your
screen multiplexer emulator.
Let’s get testing by running a long-running script on the session. Let’s download some bug file
Now our download will begin, and the progress will be display on the screen.
Now, we are going to detach from the session using Clrl+A and then press d.
now lets list out the
screen windows using the
-ls (list) option
We are can use the
-r (reattach) option and the number of the session to reattach to it
And just like that, you’re back working on your download. 😄
You can always exit from a screen session by just typing the
exit command as you would do in a typical session.
If you’re not comfortable using numbered sessions and would like some semantic name for them you can do use using the
-S (session name) option.
screen -S bigassDownload
Appropriately our command to reattach will now be leveraging the name of the session that we had quite some creatively given
screen -r bigassDownload
- On the terminal, type
- Use Ctrl+a + d to detach from the screen session
- Reattach to screen session by typing
screen -r <ID>
- Start a named session using
screen -S <name>
- Reattach to a named screen session by typing
screen -r <name>
My fellow coders, programmers, and wannabe hackers; we just learn how to use
screen on Linux. Now you can start using the utility and go-crazy impressing people with your nifty terminal skills.
You can also personalize your
screen utility by using a
.screenrc file. To learn about the various customization options you can follow the Screen User's Manual.
Read more at Grizzlybit 🐻