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How to get fewer TTYs with systemd?
To disable gettys on particular TTYs 4-6 while possibly leaving 1-3 and 7-9 working, run: mask creates symlink /etc/systemd/system/ {name} -> /dev/null which effectively disables service. Attempt to run it via systemctl start will display error Failed to start NAME.service: Unit NAME.service is masked.
How to exclude processes in logind.conf ( 5 )?
KillOnlyUsers=, KillExcludeUsers= These settings take space-separated lists of usernames that override the KillUserProcesses= setting. A user name may be added to KillExcludeUsers= to exclude the processes in the session scopes of that user from being killed even if KillUserProcesses=yes is set.
How to disable logind system power and sleep keys?
A different application may disable logind’s handling of system power and sleep keys and the lid switch by taking a low-level inhibitor lock (“handle-power-key”, “handle-suspend-key”, “handle-hibernate-key\\
Can you read or write from a TTY file?
TTYs are files that you can use just like any other. You can open them with the standard file-opening tools of your language and read or write from them. They have some special behaviour that’s different to “ordinary” files, but the basics are the same. I’ll cover some of the special cases at the end, but first, an experiment.
Can a TTY be used on a USB device?
The TTYs that back your terminal will be owned by you, but another user’s TTY won’t, and TTYs for USB devices may or may not be, depending on your configuration. You can change the permissions in the same way as always. As far as writing a program to work with it goes, you don’t need to do much special.
How to tell the difference between systemd and terminal?
If you want to inspect the difference yourself, you can use systemd-run /path/to/binary, it will run your app in a transient scope, as it would be run by a systemd service. You’ll get output like: Running as unit: run-u160.service.
How do I get back to my desktop using TTY?
To get back to your graphical desktop environment, press Ctrl+Alt+F2. Pressing Ctrl+Alt+F1 will return you to the login prompt of your graphical desktop session. At one time, Ctrl+Alt+F1 through to Ctrl+Alt+F6 would open up the full-screen TTY consoles, and Ctrl+Alt+F7 would return you to your graphical desktop environment.
How do I switch from tty3 to tty6?
You can then switch between tty3-6 by pressing Alt with the appropriate F-key. Finally, you can get back to the GUI with Alt + F1 for the login chooser or Alt + F2 for the logged-in user’s desktop.
What’s the function key for TTY on Linux?
You can use function keys Ctrl+Alt with function keys F3 to F6 and have four TTY sessions open if you choose. For example, you could be logged into tty3 and press Ctrl+Alt+F6 to go to tty6.