Run a command after sleep

HabibR · 09-29-2018, 09:01 AM

hi,
i would like to run the following command

command:" ./serialdump-linux -b115200 /dev/ttyUSB2 |tee test.csv "

Its need to wait 10 second before run the program and then it need to run the program for 100 second

after 100 second, program need to kill

Whats the possible way to run this in linux??

is it possible to run a beep before start the command and before kill the program?/

I am a newbie with linux

any help will be appreciated

Thanks

lougavulin · 09-29-2018, 09:37 AM

Hi,

You can wait for N seconds :

Code:

sleep N

Launch your command in background :

Code:

./serialdump-linux -b115200 /dev/ttyUSB2 |tee test.csv &

# keep its PID
PID=$!

Wait again for M seconds.

And kill the command :

Code:

kill $PID

Turbocapitalist · 09-29-2018, 09:41 AM

You can also use timeout to limit the duration.

Code:

/usr/bin/timeout 100 ./serialdump-linux -b115200 /dev/ttyUSB2 |tee test.csv &

It's there among the GNU core utilties. See "man timeout".

You might also want to use a full path to the serialdump-linux script.

HabibR · 09-29-2018, 09:44 AM

Hi,
Thanks for your reply
Do i need to make it as script or run in the command prompt?
Thanks

Quote:

Originally Posted by lougavulin

Hi,

You can wait for N seconds :

Code:

sleep N

Launch your command in background :

Code:

./serialdump-linux -b115200 /dev/ttyUSB2 |tee test.csv &

# keep its PID
PID=$!

Wait again for M seconds.

And kill the command :

Code:

kill $PID

pan64 · 09-29-2018, 10:19 AM

Quote:

Originally Posted by HabibR

Do i need to make it as script or run in the command prompt?

No, you don't need to make script, but if you wish to run it several times better to construct one.
Actually it only depends on you.

BW-userx · 09-29-2018, 10:49 AM

if it is a one time run then command line will work, if you plan on reusing it, a script will save you time in having to rewrite it again and again...

HabibR · 09-29-2018, 12:45 PM

Hi,
Thanks
This one works for me

Quote:

Originally Posted by Turbocapitalist

You can also use timeout to limit the duration.

Code:

/usr/bin/timeout 100 ./serialdump-linux -b115200 /dev/ttyUSB2 |tee test.csv &

It's there among the GNU core utilties. See "man timeout".

You might also want to use a full path to the serialdump-linux script.

KenUnix · 12-27-2019, 09:42 PM

The guys are rite on. To do exactly what you ask
create a simple script containing the following
then chmod to 755 scriptname to make it executable.
Way back when I was a newbie I found it helpful to see examples.

#!/bin/bash
sleep 10
timeout 100 <your command>
echo "Terminated"

Then to execute type in ./scriptname

#!/bin/bash means use the bash shell.
sleep xx means wait for a period of seconds.
timeout means let a command execute for a period of time in seconds.