How to fix error Read-only file system after using qouta

I am making linux excercises, but something went wrong. In /etc/fstab I add some to this line: UUID=20c2ec5-dasdas-dasdas-dsd-sad / ext4 errors=remount-ro,usr-quota,grp-quota 0 1 (added: usr-quota,grp-quota) and create files: touch /quota.user chmod 0600 /quota.user touch /quota.group chmod 0600 /quota.group and run sudo reboot. After reboot I got Read-only file system error. How to fix that? GUI…

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In Firefox and Chrome videos will play for a moment then stop (Ubuntu running in VirtualBox)

I’m running Ubuntu in VirtualBox and it’s working perfectly in almost every single way, except when trying to play videos in browsers. I get the behaviour as you can see in the recording below. https://imgur.com/a/nHbOgSk The recording is in Firefox but it happens in Chrome, too. Firefox does have some extensions, but Chrome is completely…

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Rearranging text file into tabular format

I have two files like this File1 Cat01_02.1 LAFP2 Cat01_02.1 NUSP8 Cat01_02.1 SP028 Cat01_02.1 ASP01 Cat02_03.1 LAFP5 Cat02_03.1 NUSP6 Cat02_03.1 SP027 Cat02_03.1 ASP08 File2 Dog06_04.7 LAFP2 Dog06_04.7 NUSP8 Dog06_04.7 SP028 Dog06_04.7 ASP01 Dog07_06.7 LAFP5 Dog07_06.7 NUSP6 Dog07_06.7 SP027 Dog07_06.7 ASP08 and I need to make a table from this file like this Cat01_02.1 Dog06_04.7 LAFP2…

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