Periodically loop a command
while true; do [YOUR COMMAND HERE]; sleep [# of seconds]; done;
Alternatively, you can put it in a simple shell script to save typing!
#/!bin/bash
while true; do $1; sleep $2; done;
/path/to/script.sh "ifconfig eth0 | grep 'inet addr:'" 60
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
[60 seconds later]
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
[60 seconds later]
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
[... Ctrl+C to stop]
What do you think?
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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watch -n60 'ifconfig eth0 | grep "inet addr:"'until false;do sleep 1;doneWhich actually is handy for things like pinging a down machineuntil ping -c1 machine;do sleep 1;done;beepwill make a beep when the machine is back up.while ifconfig eth0 | grep "inet addr:";do sleep 60; done;while true; do ping pong.sunet.se; date >> downTime; done;