execute the shell script per ten seconds

Shell Programming and Scripting
1

hi, everyone.
My want to execute the shell script below per 10 seconds

PID=`pgrep java`
if [ $PID == ""  ] 
   then 
   /home/java/java 
fi

crontab wouldn't help me.
some one can give me suggestions?thanks

---------- Post updated at 07:29 AM ---------- Previous update was at 07:26 AM ----------

a mistake in title
not 10 mins,
it's 10 seconds

2

Use a while loop with a sleep of 10...

1 Like
3

Are you sure?

Please post what Operating System and version you have and what Shell you are using.
Also, please post what problem you are trying to solve.

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4

in partitular,plz
i am newbie

---------- Post updated at 07:53 AM ---------- Previous update was at 07:48 AM ----------

RHEL 6.2
may be bash...
sorry, i'm newbie.i just want to execute the script i post per 10 seconds

the precision of crontab can make it run just per minute .

5

Consider what would happen if you had the following 6 crons:

/path_to_script/scriptname
sleep 10;/path_to_script/scriptname
sleep 20;/path_to_script/scriptname
sleep 30;/path_to_script/scriptname
sleep 40;/path_to_script/scriptname
sleep 50;/path_to_script/scriptname

However I do wonder if what you are attempting to do is at all sensible.
What problem with java are you attempting to solve?

1 Like
6

thanks. i think it's okey.
i just want to do some test with java.

7

Hi.

There is more than one way to interpret your question; methyl and vbe have one, here's another:

SYNOPSIS
       timeout [OPTION] NUMBER[SUFFIX] COMMAND [ARG]...
       timeout [OPTION]

DESCRIPTION
       Start COMMAND, and kill it if still running after NUMBER seconds.  SUF-
       FIX may be 's' for seconds (the default),  'm'  for  minutes,  'h'  for
       hours or 'd' for days.

-- excerpt from man timeout on CentOS release 6.2 (Final)

Note that it is usually more important to state the answer to:

Best wishes ... cheers, drl

1 Like