GUI freezes, not access to to TTY, lost root partition
26634
How do I debug when the system freezes or when it crashes back to login?
135721
What is a tty, and how do I access a tty?
23286
dpkg: error: dpkg status database is locked by another process
93774
gnome-terminal fails to start (timed out)
156142
Ubuntu freezes randomly with audio playing in the background
51429
How do I troubleshoot a Windows freeze or slowness?
15750
App crashes, dock icon remains, can't reboot, yet no process in ps aux to kill
62046
16.04 - system hangs at boot time at "Started Update UTMP about System Runlevel Changes"
2563
TTY doesn't wait for password
8461
Gnome terminal will not start
10765
How do I boot to a command line interface instead of a GUI?
126728
Ubuntu 12.04 boots to TTY1
80258
Unable to open any graphical app with "sudo"
133821
What is this “(arg: 1)” appearing in terminal/tty after I pressed a combination of keys?
95655
Investigating a system "freeze"
94544
Terminal not working. Prompt gone!
23327
GUI does not start