when the computer or an application is not responding

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21
votes
4answers
38k views

How to completely disable swap?

I am using Debian sid, hard drive formatted with ext4, running on linux 3.1 I remember on previous linux versions (maybe before 3.0), if I run out of memory, and swap is not enabled, programs will ...
2
votes
2answers
3k views

Make iotop show only the most disk-intensive item

My laptop (no VM, just plain Ubuntu with encrypted home) freezes for 3 minutes a few times per day. During these 3 minutes, the disk LED indicates intense disk activity, and I can't even move the ...
7
votes
1answer
374 views

Where should I look for error messages after a freeze-up and reboot in Linux?

I was forced to shutdown (using the power button) and reboot after my laptop froze with just a black screen. After such an incident, where should I look for error messages etc. that might indicate ...
1
vote
2answers
525 views

scp hardlocking my server (both ways)

I have this strange issue. scp is hard locking my server. I have tried memcheck, tried downloading big files using wget, tried speed test in openssl and everything works just fine, yet every time I ...
0
votes
0answers
592 views

Using xrandr freezes computer completely

I have the following problem: I have a laptop (open) with an external monitor connected. After boot, everything is perfect - the laptop screen is on the left of the external one and both resolutions ...
4
votes
1answer
2k views

How to quit GNOME file copy GUI after it hangs

Many times I find GNOME file copy GUI tool (Nautilus) irritating when it stops working. It happens when: I cancel the copy or move I try to copy to blue tooth exchange folder to my friends ...
1
vote
5answers
634 views

No response on a Linux machine

I am using centOS, sometimes the system just does not respond at all. In windows box, I can ctrl-alt-delete. On a Linux machine, how should I handle this?
177
votes
3answers
96k views

How to unfreeze after accidentally pressing Ctrl-S in a terminal?

It's a situation that has happened quite often to me: after I press (with a different intention) Ctrl-S in a terminal, the interaction (input or output) with it is frozen. It's probably a kind of ...
7
votes
4answers
2k views

Debugging Linux machine freezes

I have 15 identical Linux RH 4.7 64-bit severs. They run cluster database (cluster is application level). On occasion (every month or so) a random box (never the same though) freezes. I can ping the ...