The system cannot be started, mount-o remount,rw / modify fstab in single user mode

When our Linux system cannot be started, we usually need to go into single-user mode to modify some configuration files or adjust some parameters. But after entering single-user mode, our / file system is read-only and cannot be modified, so we need to use a command: mount-o remount,rw / this command to make our / path file system readable so that we can modify it freely.

For example:

Added / etc/mtab

/ dev/sdb1 / install ext3 rw 0 0

/ etc/fstab

LABEL=/install / install ext3 defaults 1 2

Then the system restarts: it won't get up, hint

Give root password for maintenance

(or type control-d to continue:)

After entering the root password, I entered the system and wanted to remove the added content. But the prompt is read-only. Do not allow modification

Use the following methods

Mount-o remount, rw /

Because root directory / is mounted inread only mode. Type follwing command, then you should be able to editrc.sysint script.

Now you can modify the / FSTAB file again. Finally, reboot, the system starts successfully.