UNIX for Dummies Questions & Answers

Hi,

I need execute a script every 30 minutes. As might be done without using cron

Thx.

Can you use the at command?

In principle I think not.
Thx

You will have to write a driver script

Code:

#!/bin/ksh
while true
do
     now=$(date +%M)
     if [[ $now -eq 30 || $now -eq 0 ]]; then
            nohup myscript arg1 arg2 & 2&>1 > log.$(date %m/%d/%y%nTIME:%H:%M:%S)
     fi
     sleep 60
done

Thx.

arg1 arg2 <--- This is obligatory ? the script not use args.

No it is an example. I gather you are new to shell script. You really should get someone to review all the code you wrote BEFORE it goes into production. Or run it in test for a day or two.

The example above creates code that runs forever, so you have to start it from the command line something like this:

Code:

chmod +x myexample.sh       # change permissions so it can excute
./myexample.sh  2>&1 > logfile  &

If it misbehaves you have to read logfile to find errors. You really should find a way to get someone who understands this stuff to create a crontab entry for you. This is not a production quality solution. By any means.

Thx!

I will probe that in a few days.