System File Recovery FAQ ​

Context ​

During normal system usage, accidental deletion of system files or unintended modifications may prevent successful system boot. This requires file system recovery/repair or backup of critical data.

Symptom ​

Missing or modified system files causing boot failure, requiring system file restoration.

Solution ​

1. Mount the installation image and switch to the background console with Ctrl+Alt+F2.

   The drive will initially show as inactive and unavailable for direct operations.

   

2. Configure network and enable SSH service:

   txt

   ifconfig eth0 xx.xx.xx.xx netmask 255.255.255.0 up
   route add default gw xx.xx.xx.xx
   cp /etc/ssh/sshd_config.anaconda /etc/ssh/sshd_config
   systemctl restart sshd

3. Activate the system volume group:

   Use vgchange -ay to activate detected file systems.

   

4. Mount partitions for system operations:

   1. Create a temporary directory test and mount the root partition /dev/oprnruler/root to it:

      

   2. Mount the boot partition /dev/sda2 to the temporary system's boot directory:

      

   3. The file system and data are now accessible for modifications.