linux:rhel:root-password [SennyWiki]

Boot from boot.iso, choose Troubleshooting > Rescue a system
Mount the system normally (not read-only), i.e. default, OK
```
chroot /mnt/sysimage
```
```
passwd root
```
```
reboot
```

Boot with 'init=/bin/bash' argument
- ListenpunktPress 'e' to start editing.
- Scroll down to the „linux16…“ or „linuxefi…“ line. This line tells GRUB 2 which kernel to boot.
- Move to the end of the line. Add the string „init=/bin/bash“ to the end after space.
- Once you have finished that change, press Ctrl-x to accept the edit, and to boot using that kernel and boot into runlevel 1 (single user mode).

Run load_policy to load the installed policy file into the kernel.
- ```
/usr/sbin/load_policy -i
```

Remount the root filesystem in read-write mode:
- ```
mount -o remount,rw /
```

Set the new password:
- ```
passwd root
```

Nur bei aktive SELinux
- ```
touch /.autorelabel
```
  Wenn Sie das System das nächste Mal neu starten, wird das Dateisystem für SElinux automatisch neu gekennzeichnet.

Run the exec-command to resume the initialization or reboot.
- ```
exec /sbin/reboot
```
  oder
```
exec /sbin/init
```