Need help in running a script continuously non stop


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Need help in running a script continuously non stop
# 1  
Old 02-21-2013
Ubuntu Need help in running a script continuously non stop

Hi,

I am running a schedular script which will check for a specific time and do the job. I wanted to run this continuously. Meaning even after the if condition is true and it executes the job, it should start running again non stop.
I am using below script
Code:
#!/bin/sh
start:
while true
do
hour=$(date +"%T")
if [ "$hour" == 18:30:00 ]; then
<Do the JOB>
goto start
fi
done

The problem I am facing here is its not recognizing start command initially. So i am not able to optimise it. Can anyone help?

Last edited by vbe; 02-21-2013 at 05:33 AM.. Reason: code tags please
# 2  
Old 02-21-2013
Code:
#!/bin/sh
while true
do
  hour=$(date +"%T")
  if [ "$hour" == 18:30:00 ]; then
    <Do the JOB>
  fi
done


Last edited by Franklin52; 02-21-2013 at 06:46 AM.. Reason: Code tags
# 3  
Old 02-21-2013
Ubuntu

Quote:
Originally Posted by balapobi
#!/bin/sh
while true
do
hour=$(date +"%T")
if [ "$hour" == 18:30:00 ]; then
<Do the JOB>
fi
done
The above script will stop running when the if condition becomes true. I want this to run daily at 18:30:00. So I thought of using the goto statement. But it is not helping me as we cannot give start initially.
# 4  
Old 02-21-2013
Use crontab to make it run everyday at a certain time.
Code:
30 18 * * * /youscript.sh

# 5  
Old 02-21-2013
Ubuntu

Quote:
Originally Posted by Jotne
Use crontab to make it run everyday at a certain time.
Code:
30 18 * * * /youscript.sh

@Jotne: Can you elaborate please? I didn't quite get that. What does 30 mean in the code?
# 6  
Old 02-21-2013
Quote:
Originally Posted by sandeepcm
The above script will stop running when the if condition becomes true. I want this to run daily at 18:30:00. So I thought of using the goto statement. But it is not helping me as we cannot give start initially.
Why should it stop - while true will stay true and thus loop forever. Which it does. It will hog CPU like mad, eventually run your 18:30h job in between...
Use Jotne's proposal and you're there.


P.S.: That START: ... GOTO START is a DOSism, I think. I guess it's unavailable in any *nix shell.
# 7  
Old 02-21-2013
Quote:
Originally Posted by RudiC
Why should it stop - while true will stay true and thus loop forever. Which it does. It will hog CPU like mad, eventually run your 18:30h job in between...
Use Jotne's proposal and you're there.


P.S.: That START: ... GOTO START is a DOSism, I think. I guess it's unavailable in any *nix shell.
Yes RudiC. It is hogging my CPU like anything. But I didn't quite get what Jotne said.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Shell script for continuously monitoring log file

Hi I have written below log monitoring script to egrep multiple words and redirect the output to a text file and its working fine but I want to add some more below given functionality to it, which is very advance and im not very good in it, so please help if you can :) I am egrepping all the... (1 Reply)
Discussion started by: scazed
1 Replies

2. Emergency UNIX and Linux Support

Script for pinging continuously

Hi, I need to set up a script that would write the results of the ping command from one AIX server to another file may be every minute. Like this I need to gather the data for a period of 24 hours. Can someone please help me with this? G (5 Replies)
Discussion started by: ggayathri
5 Replies

3. Shell Programming and Scripting

How to run a process continuously for an hour then stop?

Hi I have a shell script I would like to run it has to run twice a day every 5 seconds for an hour I can do this with cron but I was hoping there was an easier way. Is there a way to make a process sleep only at a certain time of day say between 1 and 2 pm? Or under certain conditions? Any help... (8 Replies)
Discussion started by: Paul Walker
8 Replies

4. Shell Programming and Scripting

Shell Script for continuously checking status of a another script running in background, and immedia

Hi, I want to write a script which continuously checking status of a script running in background by nohup command. And if same script is not running then immediately start the script...please help.. i am using below command to run script nohup system_traps.sh & but in some... (9 Replies)
Discussion started by: ketanraut
9 Replies

5. Shell Programming and Scripting

Run a script continuously for 10 minutes

Hi all!! Im using ksh and my OS is Linux. I want to run a script for ten minutes, starting from my current system time. How to acheive this? Any help appreciated. Thanks in advance (5 Replies)
Discussion started by: Jayaraman
5 Replies

6. Shell Programming and Scripting

Process running? Stop it

I have this "process keepalive" script: #!/bin/bash PIDFILE=/tmp/php.pid PHPSCRIPT=/home/www/mydomain.com/subdomains/www/parser.php echo 'Checking php process from PID file' if ; then PID=`cat $PIDFILE` if ps ax | grep -v grep | grep $PID > /dev/null then echo "php process still... (4 Replies)
Discussion started by: LukasB
4 Replies

7. Shell Programming and Scripting

Shell Script to continuously scan a log file

Hello members, I have some doubts on how to write a script that can reports success / failure of a batch job ? 1. Run a batch job: 2. Wait and search for a particular string in the Log file: tail -f log01*.txt | egrep -v "^SUCCESSFUL" echo "continue with the other tasks" ... (1 Reply)
Discussion started by: novice82
1 Replies

8. Shell Programming and Scripting

How to stop a script running in remote server from local script

Hi, I have googled for quite some time and couldn't able to get what exactly I am looking for.. My query is "how to stop a shell script which is running inside a remote server, using a script"??? can any one give some suggestions to sort this out. (1 Reply)
Discussion started by: mannepalli
1 Replies

9. Shell Programming and Scripting

How to stop the script which is running in background

Hi I have a script, which i ran in background, can someone please help in stopping this. i gave this command: ksh abc.ksh & this script sends me a mail every 30 seconds. i have deleted the script but still i am getting the mails. can some one please help me stopping dese. ... (3 Replies)
Discussion started by: Prateek007
3 Replies

10. Shell Programming and Scripting

How to stop asking password while running shell script?

Hello, I am ftping the file from one unix box to another box. This script works fine. Only problem here is, it is asking the password when ftp the file. How can i stop that. I am providing the password inside the shell script. But it is not accepting this. I need to put this script in crontab.... (5 Replies)
Discussion started by: govindts
5 Replies
Login or Register to Ask a Question