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# 1  
Old 03-10-2012
tail for 15 mins


I want to write a script which will tail a particular file for 15 mins and then sleep for 10 mins and again tail for 15 mins. This cycle will go on for a limited period of time.
How can i ensure that tail command will run for 15 mins before calling sleep command

# 2  
Old 03-10-2012
Hope this basic example helps.

tail -f logfile & PID=$!
sleep 900
kill $PID
tail -f logfile & PID=$!
sleep 600
kill $PID

# 3  
Old 03-10-2012
Something like this?

while true
  tail -f infile &
  sleep 1500
  kill -9 $pid >/dev/null 2>&1

# 4  
Old 03-10-2012
I don't understand what does he mean by tail for 15 mins.
# 5  
Old 03-10-2012
try with "watch" command.

watch -n 900 "tail filename"

Last edited by ungalnanban; 03-10-2012 at 07:38 AM.. Reason: example
# 6  
Old 03-10-2012
The "watch" command is specific to BSD, is that what your O/S is?
# 7  
Old 03-10-2012
If I look at the OP's requirement it should be more like:

while :
  tail -f file & pid=$!
  sleep 900
  kill $pid
  sleep 600

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