Download 4-TW/46-fs 10-Hz: Tisapphire laser system by Xu Z., Yang X. PDF

By Xu Z., Yang X.

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This returns the number of seconds since epoch directly. gnu seconds since epoch=`date +%s` There is also a Perl function for performing the same task. You can access it like this: perl seconds since epoch=`perl -e 'print time'` Evaluating for the Current Day and Time Say you want to schedule a job, such as a system monitor, to run at particular times or on certain days. You want to know whether there are issues on the system, but you don’t necessarily want to be jarred awake by your pager simply to learn that the message is noncritical; you’d like to get those routine notices by page during the day and by e-mail at other times.

The usage presented here will work on Linux systems. HP-UX machines would use the command ping $NODE 3 for the same functionality. isalive() { NODE=$1 $PING -c 3 $NODE >/dev/null 2>&1 if [ $? -eq 0 ] then return 1 else return 0 fi } The final function is one you’ll find useful if you need to run your scripts on multiple hosts, some for which you don’t know the exact configuration. It sets the path to an executable based on the operating-system type, in this case the path to ping, and stores its value as a variable.

If [ ! = "error" ] Send a warning notification... Send an error notification... If the file’s line count is less than the base value (the value from the previous loop through the code), you need to reset the base value. = "" ] then MSGS=`cat $logfile | egrep -i "\"$strings\"" | egrep -iv "$exceptions"` test $debug -gt 0 && echo "MSGS is $MSGS" else MSGS=`cat $logfile | egrep -i "$strings"` test $debug -gt 0 && echo "MSGS is $MSGS" fi if [ ! = "error" ] then echo Send a warning notification... else echo Send an error notification...

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