//View Tip #894
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Dave Grime
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This script will run check a for the Ubuntu 9.10 launch once every 5 mins and let you know when it's available:
while [ 1 ]; do if [ -z "`curl -I "http://cdimage.ubuntu.com/releases/9.10/release/"|grep "404"`" ]; then kdialog --msgbox "9.10 Released"; exit; fi; sleep 300; done
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Better to search for a positive, than to exclude one specific negative. 404 isn't the only error. The server could be down!!
while [ 1 ];
do if [ ! -z "`curl -I "http://cdimage.ubuntu.com/rele … ease/";|grep "HTTP/1.1 200 OK"`" ];
then
zenity --warning --text "9.10 Released"
exit;
fi;
sleep 300;
done
while [ 1 ];
do if [ ! -z "`curl -I "http://cdimage.ubuntu.com/rele … ease/";|grep "HTTP/1.1 200 OK"`" ];
then
zenity --warning --text "9.10 Released"
exit;
fi;
sleep 300;
done
Posted 2009-10-29 04:58:21
One of the worst tips ever.
cron was made for exactly that...
cron was made for exactly that...
Posted 2009-10-29 05:30:58
Dave GrimeMartin:
Surely cron was made for recurring tasks with no end condition? I would have said this is exactly what 'while' was made for!
Surely cron was made for recurring tasks with no end condition? I would have said this is exactly what 'while' was made for!
Posted 2009-10-29 08:53:09
while [ 1 ]; do if [ -z "`curl -I "http://cdimage.ubuntu.com/rele … ease/";|grep "404"`" ];
then zenity --warning --text "9.10 Released"; exit; fi; sleep 300; done