How to terminate this command

slpwkr · 03-28-2005, 12:23 AM

Hi guys how can I terminate this command in BASH script.

$ cat /dev/ttyS0

I terminate this commad by using Ctrl c or Ctrl z. But how can I terminate this automatically?

zeropash · 03-28-2005, 12:52 AM

kill -HUP pid ?

slpwkr · 03-28-2005, 03:33 AM

Can't do that because the command:

$ cat /dev/ttyS0

will be put into a script file. like this one

!#/bin/sh

$ cat /dev/ttyS0

And I will run script file it cron like every 1 minute. If I will use ps and kill. It will be very complocated because every process has different ps id. I just want to cat and redirect the /dev/ttyS0 every 1 minute but "cat /dev/ttyS0" never stops.

keefaz · 03-28-2005, 05:35 AM

Execute it in background like :

Code:

cat /dev/ttyS0 &
pid=$!

# wait some time
sleep 2

echo "Now I kill cat /dev/ttyS0"
kill $pid

skie_knite007 · 03-28-2005, 11:33 AM

U can juz use ctrl+ C

or use ps -ax command to kno the process id of the program
Suppose the process ID is 2848.
Now type kill 2648 (from other terminal as root) and the program will be terminated