How would one monitor the size of a file in realtime, then when it reaches a certain size (like 10megs), gzip, append timestamp to filename and scp to another box?
regards
Use sleep command, and ls -l or du command within a loop until the file size reaches your upper limit, and then add the timestamp and transfer.
Please try out and post if you have further problems.
My first attempt...
Check file size
If file reached file size
Append date to filename
Compress filename.$date
scp filename.$date to target server
#!/bin/bash
SIZE=`ls -la syslog.log | cut -d' ' -f 5 `
echo $SIZE
if [ "$SIZE" -ge 10000000 ]
then
`mv syslog.log syslog.log.$date | gzip syslog.log.$date | scp syslog.gz jdoe@system.com:\home\jdoe\logs `
else
echo "size not reached yet"
sleep 5
fi
Do you know, in general, what is the purpose behind using backticks (`) and using pipe(|)?
get rid of those backquote and pipe
mv syslog.log syslog.log.$date
gzip syslog.log.$date
scp syslog.gz jdoe@system.com:\home\jdoe\logs
/or/
mv syslog.log syslog.log.$date && mv syslog.log syslog.log.$date &&
scp syslog.gz jdoe@system.com:\home\jdoe\logs
Good attempt! You haven't used any loop structure. You can try using while or until loop.
I think Vidyad meant that last line to be
mv syslog.log syslog.log.$date && gzip syslog.log.$date &&
scp syslog.gz jdoe@system.com:\home\jdoe\logs
But I'm not sure about that $date variable- does that work? I think in the shell I've been using I had to use `date` command instead.
hope this will solve your doubt 
fnsonlu1-/home/fnsonlu1> date=`date`
fnsonlu1-/home/fnsonlu1> echo $date
Tue Mar 17 12:25:51 IST 2009
fnsonlu1-/home/fnsonlu1>date="vidya"
fnsonlu1-/home/fnsonlu1> echo $date
vidya
fnsonlu1-/home/fnsonlu1>