Emergency mode fstab
 

Hello, I am using OpenSUSE Leap 42.2. I made a typo in fstab by commenting a whole line that was /dev/system/home. Now I just want to comment, I think #/home, and the columns after that. I tried editing but it was read-only. I tried :wq! but it didn't work. I think I'm running as root. How do I make fstab writable?
I tried mount / -o remount,rw but It just let me type an indefinite number of lines. How do I exit that?

To check if you are root run;
Not sure what you mean with comment out HOME. If you mean that line you just need to remove HOME from that line as you cannot comment out just home from it without commenting out everything that follows.

Start by rebooting - force by holding the power button in need. That way we know what state you are in. Try the command as

For what it's worth, whenever I change a line in /etc/fstab, I remark out the original line and create a new line. That makes it easier, if I muck it up, to revert to the previous configuration. That has saved my bacon several times.

If worse come to worse, you can boot to a Live CD of something, mount the root partition, and edit /etc/fstab from there.

How do I mount from a live CD?
And, I tried rescue system. Couldn't find out how to mount it from there.

No I didn't back up my files.

It's not hard. Once booted into the rescue system you'll have a shell prompt. Do
Next, try
or
The first entry that is not type swap will probably be your openSUSE root partition, probably /dev/sda1, in which case, do
If you're not sure about which entry is your openSUSE root partition, try
or whichever # you think is the right one. That will report UUID, volume label, filesystem type and more.

The file /etc/fstab is a system file therefore you must be the root operator to save changes to it.
(You can also use sudo if it is configured on your system.)