I am surprised that /mnt, /media or even /opt are not writable by myself on my own system (Linux-Ubuntu). Should I always use sudo for any action on these paths?Or would it be better to add myself to the root group?I guess this might be the thing to do:sudo chown root:nowox /opt /mnt /mediasudo chmod u+w /opt /mnt /media
Should I take ownership of /media, /mnt, and /opt or join root group?
files;permissions;filesystems
Do not add yourself to the root group, this many have many unintended side effects granting more than you intended.These directories are intentionally not writable by normal users.  In the event you need to make manual changes to them (which will be rare), you can perform those operations as root via sudo.