Disable clearing of boot messages
After the boot process, the screen is cleared and the login prompt appears, leaving users unable to read init output and error messages. This default behavior may be modified using methods outlined in this article.
Note that regardless of the chosen option, kernel messages can be displayed for inspection after booting by using
dmesg or all logs from the current boot with
Using flow control
This is basic management that applies to most terminal emulators, including virtual consoles (vc):
Have boot messages stay on tty1
By default, arch has the
getty@tty1 service enabled. The service file already passes
--noclear, which stops agetty from clearing the screen. However systemd clears the screen before starting it because the unit file uses
TTYVTDisallocate=yes. To disable this:
# sed /TTYVTDisallocate=/s/yes/no/ -i /etc/systemd/system/getty.target.wants/getty\@tty1.service
Disable clearing in /etc/issue
If you have an old
/etc/issue that has the "clear TTY" escape sequences, remove them.
# sed -i $'s/\e\[H//; s/\e\[2J//' /etc/issue