The “screen” command in Linux is a terminal multiplexer, which allows a user to open and manage multiple terminal sessions within a single terminal window.
The primary benefit of using screen is that it allows users to maintain multiple terminal sessions within a single window, which can be useful in a variety of situations. Some common use cases for screen include:
- Remote access: When working remotely, screen can be used to maintain a connection to a remote server even if the network connection is lost. This allows the user to reconnect to the server later and resume the session without losing any work.
- Long-running processes: If a process is expected to run for a long time, screen can be used to detach from the session and reattach later, allowing the user to log out or switch to other tasks without interrupting the process.
- Multiplexing: screen allows you to have multiple terminal windows open within a single screen session. You can switch between them easily, this can be useful when you are working on multiple tasks at the same time.
- Collaboration: screen allows multiple users to connect to the same session, which can be useful for collaboration and troubleshooting.
- Scripting: It can be used for running multiple commands in a script, and you can see the output of the commands in the screen.
- Server Management: It can be used to manage multiple servers from a single terminal.
Some common commands for the screen include:
screen: Start a new screen session screen -S session_name: To start a named session for better management screen -ls: List all running screen sessions screen -r: Resume a detached screen session screen -d: Detach a screen session screen -X: Send a command to a running screen session screen --help: To check the help page of screen command CTRL+a d: Detach from a screen session CTRL+a c: Create a new terminal window within the screen session CTRL+a n: Switch to the next terminal window within the screen session CTRL+a p: Switch to the previous terminal window within the screen session CTRL+a ": Show a list of all terminal windows within the screen session
You can also create a custom shortcut key to switch between the windows
CTRL+a a: Send the CTRL+a command to the current terminal window CTRL+a ?: Show a list of the command-line options and key bindings.
I’m an experienced Cloud/Oracle Applications/DBA Architect with more than 15 years of full-time DBA/Architect experience. I have gained wide knowledge on Oracle and Non-Oracle software stack running on-prem and on Cloud and have worked on several big projects for multi-national companies. I enjoy working with leading-edge technology and have a passion for Cloud architecture, automation, database performance, and stability. Thankfully my work allows me time for researching new technologies (and to write about them).
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