Sign up ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It's 100% free, no registration required.

RHEL system has run out of memory and is now frozen. The SysReq commands are not working, so I am not even sure that /proc/sys/kernel/sysrq is set to 1. Is there any other "safe" way I can reboot w/out power cycling?

share|improve this question
Define "frozen". Did it panic? Or did something else happen? – Michael Hampton Feb 19 '13 at 3:12
The Big Red Button should unwedge it enough to shut down (somewhat) normally; if not, waiting a while for activity to drain and pulling the plug might be the only option. Oh, and make sure you know how this happened so it won't happen again. – vonbrand Feb 19 '13 at 4:08
@MichaelHampton It's completely unresponsive. It didn't panic, it just ran out of memory. The last update to a top display showed 0 bytes of swap and a couple of kb of physical memory. – AnonSubmitter85 Feb 20 '13 at 15:22

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.