Password reset- remount command not working

I set up my PC with Zorin OS 18.1, have been so busy I haven't touched it for 3 months and I can't remember my password. I've tried the method of going into recovery mode but when I type

"mount -o rw, remount /"
I get "mount: /: special device remount does not exist."

Please help! I'm super new to this stuff and this is beyond my understanding.

Nevermind, I figured it out.

For anyone with the same problem, I just played around with the spaces and stuff until eventually "mount -o rw,remount /" worked.

Then did the passwd "my_username" and reset my password and rebooted and all is well.

I marked post#2 with corrected command as Solution.

I covered all three possible solutions in the Unofficial Manuals for 15, 17 and 18 under 'The Login Loop':

I've tried every combination of the command "mount -o rw,remount/" with and without spaces rearainged every way probably 20+ variations and still when I go to enter the password it is rejected. I get to the "passwd my user name" enter new password, reenter ,,, password changed successfully.
But they it rejects the password every time
Any suggestions would be very appreciated ,,, thanks to all

Perhaps it's a problem with the keyboard layout. You could try typing the letters as if you were using an English keyboard layout. But I'm not sure.

I am using an English keyboard layout