I installed Ubuntu Desktop 26.04 (Resolute Racoon) last week. I’ve been surprised at how nice it is to use!
That said I ran into a disk space issue this AM. This was strange. I haven’t even been installing much of anything on it!
Here’s how I fixed it…
Pressing ESC during boot let me see it was hanging trying to start the Gnome Display Manager (GDM) service.
Pressing SHIFT let me boot into recovery mode and login.
I discovered that the / volume was 100% full. I learned that /var/log/ was excessively large with:
sudo du -h --max-depth=1 / 2>/dev/null | sort -rh | head -20
I used this to find large files:
sudo find / -xdev -type f -size +500M 2>/dev/null
I noticed that /var/log/syslog was 848 GB (!!!), so I truncated it with:
sudo truncate -s 0 /var/log/syslog
That recovered the system. I’m watching to see if /var/log/syslog grows again.