When everything stops working, first try Ctrl + Alt + F1 to go to a terminal, where you can likely kill X or other problem processes. If even that doesn’t work, try using holding down Alt + SysReq while pressing (slowly, with a few seconds between each) R E I S U B .
What can I do when Ubuntu freezes?
Things to do when your Linux desktop GUI freezes
- Execute command xkill from terminal. …
- ubuntu-freeze-xkill cursor sign. …
- Using Alt + F2 command to open the dialog box. …
- Stop a program from the terminal using Ctrl + C. …
- Use the TOP program to Close programs. …
- Press Ctrl + Alt + F3 to drop to Console mode.
How do I fix Ubuntu 18.04 random freezes?
5 Answers
- Go to Software & Updates. Go to additional drivers tab and wait for the options to load.
- Chose Nvidia driver meta-package from nvidia-driver-304. Click apply changes and wait for the driver to install.
- You can also increase you swap space.
How do I unfreeze my Ubuntu desktop?
Restart Gnome in Ubuntu
If your desktop can still respond to your keyboard, press Alt + F2 , type the single letter r on the pop-up window, and press Enter. This will restart your desktop environment without much fuss.
Why does my Ubuntu freeze?
If you are running Ubuntu and your system randomly crashes, you may be running out of memory. Low memory could be caused by opening more applications or data files than will fit in the memory you have installed. If that is the problem, do not open so much at one time or upgrade to more memory on your computer.
How do you unfreeze a terminal?
The Unresponsive Terminal
- Press the RETURN key. …
- If you can type commands, but nothing happens when you press RETURN, try pressing LINE FEED or typing CTRL-J. …
- If your shell has job control (see Chapter 6), type CTRL-Z. …
- Use your interrupt key (found earlier in this chapter—typically DELETE or CTRL-C. …
- Type CTRL-Q.
How do you unfreeze a Linux computer?
Ctrl + Alt + PrtSc (SysRq) + reisub
This will restart your Linux safely. It’s possible that you’ll have problem to reach all the buttons you need to press. I’ve seen people type reisub with their nose 
So, here’s my suggestion: With your smallest finger on the left hand, press Ctrl.
How do you refresh Ubuntu?
On Ubuntu Unity
Proceed as follows: Step 1) Press ALT and F2 keys simultaneously. Step 2) Enter unity command to restart Unity desktop. That’s it!
How do I clear the cache in Ubuntu?
How to Clear Cache in Linux?
- Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches.
- Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches.
- Clear pagecache, dentries, and inodes. # sync; echo 3 > /proc/sys/vm/drop_caches. …
- sync will flush the file system buffer.
How do I access Task Manager in Ubuntu?
You can now press the CTRL + ALT + DEL keyboard combination to open up the task manager in Ubuntu 20.04 LTS. The window is divided into three tabs – processes, resources, and file systems. The process section displays all the currently running processes on your Ubuntu system.
How do I fix unresponsive Linux?
This is a suggested method:
- Press Ctrl+Alt+F2 to switch to a terminal window. …
- Press Alt+SysRq+R to get the keyboard.
- If pressing Ctrl+Alt+F2 before failed, try it again now.
- Press Alt+SysRq+E to term all processes.
- Press Alt+SysRq+I to kill all processes.
- Press Alt+SysRq+S to sync your disks.
- Wait for OK or Done message.
What does Ctrl Alt F1 do?
Use the Ctrl-Alt-F1 shortcut keys to switch to the first console. To switch back to Desktop mode, use the Ctrl-Alt-F7 shortcut keys.
How do I boot Ubuntu into recovery mode?
Use Recovery Mode If You Can Access GRUB
Select the “Advanced options for Ubuntu” menu option by pressing your arrow keys and then press Enter. Use the arrow keys to select the “Ubuntu … (recovery mode)” option in the submenu and press Enter.
Does Linux ever crash?
It is also common knowledge that Linux system rarely crashes and even in the advent of it crashing, the whole system normally won’t go down. … Spyware, viruses, Trojans and the like, which often compromise computer performance are also a rare occurrence with the Linux operating system.
Why is Ubuntu so unstable?
You might have some driver problems, your mirrors could be setup incorrectly, you might have some broken packages from an interrupted update, your IO governer might be configured incorrectly, you might have some unstable packages from a shady PPA, there’s the chance that you did something stupid, not meeting the system …