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UNIX for Beginners Questions & Answers
Controlling terminal of a display server
Post 303044483 by sea on Monday 24th of February 2020 06:02:29 AM
02-24-2020
I'm not quite sure I got your question, so please be "understanding" if I misunderstood you.
All *nix based systems have multiple TTY's, usualy 4 but can be 6 or 7 as well.
This includes Fedora
(Simplified)
Other than how they work (backend-under the hood) to provide the GUI, Wayland and Gnome are no different to each other, same for any other GUI/WM/etc....
At any given time - unless you somehow managed to freeze your system - you ALWAYS can press "CTRL+ALT+ {F1...F7}" to switch to the speficic TTY1 - 7.
If I remember correctly, most *nix based distributions use TTY2 or TTY4 as the default GUI-TTY, while the other TTY's could be used for other things - regular console usage, with the exception of TTY1.
And something to clarify, a GUI is not the OS (any *nix, incl BSD etc, Mac, heck, even Windows), this said, both, Gnome and Wayland have the same compatiblity to the underlying OS, this includes - but is not limited to - how they get started from a TTY, as they both rely on the same services and methods.
Hope this helps
If it does not, please wait for someone else to respond or rephrase your question.
Thank you and have fun!
All *nix based systems have multiple TTY's, usualy 4 but can be 6 or 7 as well.
This includes Fedora
(Simplified)
Other than how they work (backend-under the hood) to provide the GUI, Wayland and Gnome are no different to each other, same for any other GUI/WM/etc....
At any given time - unless you somehow managed to freeze your system - you ALWAYS can press "CTRL+ALT+ {F1...F7}" to switch to the speficic TTY1 - 7.
If I remember correctly, most *nix based distributions use TTY2 or TTY4 as the default GUI-TTY, while the other TTY's could be used for other things - regular console usage, with the exception of TTY1.
And something to clarify, a GUI is not the OS (any *nix, incl BSD etc, Mac, heck, even Windows), this said, both, Gnome and Wayland have the same compatiblity to the underlying OS, this includes - but is not limited to - how they get started from a TTY, as they both rely on the same services and methods.
Hope this helps
If it does not, please wait for someone else to respond or rephrase your question.
Thank you and have fun!
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LEARN ABOUT MOJAVE
systemd-tty-ask-password-agent
SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) systemd-tty-ask-password-agent SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) NAME
systemd-tty-ask-password-agent - List or process pending systemd password requests SYNOPSIS
systemd-tty-ask-password-agent [OPTIONS...] [VARIABLE=VALUE...] DESCRIPTION
systemd-tty-ask-password-agent is a password agent that handles password requests of the system, for example for hard disk encryption passwords or SSL certificate passwords that need to be queried at boot-time or during runtime. systemd-tty-ask-password-agent implements the Password Agents Specification[1], and is one of many possible response agents which answer to queries formulated with systemd-ask-password(1). OPTIONS
The following options are understood: --list Lists all currently pending system password requests. --query Process all currently pending system password requests by querying the user on the calling TTY. --watch Continuously process password requests. --wall Forward password requests to wall(1) instead of querying the user on the calling TTY. --plymouth Ask question with plymouth(8) instead of querying the user on the calling TTY. --console Ask question on /dev/console instead of querying the user on the calling TTY. -h, --help Print a short help text and exit. --version Print a short version string and exit. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. SEE ALSO
systemd(1), systemctl(1), systemd-ask-password-console.service(8), wall(1), plymouth(8) NOTES
1. Password Agents Specification https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents systemd 237 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)