SystemD mode recovery single mode linux kernel param

Parametre Kernel

• systemd.unit=rescue.target
• systemd.debug-shell=1
• systemd.unit=emergency.target

pour allez dans le tty8 ou tty9

ce qui revient à

systemctl enable debug-shell.service

Dans le grub, ligne commençant par linux

init=/bin/bash

mount -n -o remount,rw /
passwd
reboot -f

kernel param rd.break Si SeLinux : ajouter : enforcing=0

Exemple :

rd.break enforcing=0

Puis

loadkeys fr
chroot /sysroot

rd.break \ ? enforcing=0

mount -o remount,rw /sysroot
chroot /sysroot
passwd
 
touch /.autorelabel 
 
# ou alors (plus rapide) : 
load_policy -i  
#puis 
restorecon -Rv /etc  

• Remove rhgb quiet using the backspace key.
• You can change “ro” to “rw” in this grub line to avoid having to do a remount (shown below).
• IMPORTANT Add to the kernel line: rd.break enforcing=0 NOTE: you might have to make “console=tty0” above as well depending if it's virtual or not.
• Press Ctrl x to resume the boot process. NOTE: If you did not change “ro” to “rw” above, make sure to remount the /sysroot partition as shown below.

mount –o remount,rw /sysroot
chroot /sysroot
passwd root

• Type exit twice to continue the boot process
• Log in, open a terminal and enter the root account.

restorecon -v /etc/shadow
setenforce 1 ; getenforce