What would you do when all the processess hangs and there is no other option in

What would you do when all the processess hangs and there is
no other option in unix?

Question Posted / nandakumar

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What would you do when all the processess hangs and there is no other option in unix?..

Answer / sushil

if all the commands are hanging then there is no point
running any command.
In this case system can be considred as it's hung. and hence
u might want to
collect some useful information to perform root cause
ananlysis before rebooting the
system.
Here we can apply magic keys and ask OS to dump memory/
registers and we can even
instruct it to terminat/kill all but init process ,
sometimes we can send
kill signal to all proccess including init.

Alt+SysRQ+m prints memory information to the console.

Alt+SysRQ+e sends SIGTERM to all processes except init.

Alt+SysRQ+i sends SIGKILL to all processes except init.

Alt+SysRQ+l sends SIGKILL to all processes, inclusive init.
Alt+SysRQ+s writes all data from the disc cache to the
harddiscs, its a sync
Alt+SysRQ+i (for the processes that didn't listen for the
TERM signal, this is a kill -9 process)
Alt+SysRQ+b (reboot).

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What would you do when all the processess hangs and there is no other option in unix?..

Answer / susheel narayan singh hcl

If you r working on /var direcotry and your
process hangs than you login with another
terminal and --

# fuser -v /var

to kill all the process of /var

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What would you do when all the processess hangs and there is no other option in unix?..

Answer / gaurav verma

killall -HUP <service name> //it will automatically stop
and start the servies mentioned//

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