Using Crontab


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Using Crontab
# 1  
Old 02-19-2007
Using Crontab

Hi All,

I've a shell script which calls a Sybase stored procedure to do some functionality. I want to schedule the running of this script by crontab. I'm using Solaris 5.8. When i executed the following command
Code:
crontab -l

i got the output as
Code:
crontab: can't open your crontab file

How can i schedule the script. I'm not the administrator. How can i unschedule it later as this script is a sample script.

Thanks in advance
Sumesh
sumesh.abraham
# 2  
Old 02-19-2007
That means that you do not yet have a crontab.
Code:
crontab -e

to edit (and thus create) it.

To view syntax on the crontab command, and the crontab file itself (as well as cron facility access controls, etc)...
Code:
man crontab

If you want to unschedule your job, either crontab -e, then remove the line containing the job completely, or just comment it out. Else; if that's the only job in your crontab, crontab -r to delete the crontab entirely.


Cheers
ZB
# 3  
Old 02-19-2007
ZB,
Thanks for the reply.

I created the crontab file and my file looks like
Code:
47,3,19,2,1 /home/dsdev/bdayfinder.sh

I want the aforesaid script to get executed at the specified time, but i get the error like

Code:
crontab: error on previous line; unexpected character found in line.
crontab: errors detected in input, no crontab file generated.

I've checked the file thoroughly and couldn't trace the problem.

Pls help me out.

Sumesh
sumesh.abraham
# 4  
Old 02-19-2007
Did you read the man page?
The syntax of your line isn't correct, the 5 time and date fields must be seperated by spaces or tabs.

Regards
# 5  
Old 02-20-2007
Thanks for the reply.

I used the correct synatx and now my crontab file is
Code:
50 1 20 2 * /home/dsdev/bdayfinder.sh

But, the script specified above is not getting executed.

I checked the /usr/lib/cron directory. There is no cron.allow file and the username dsdev which i use is not present in cron.deny as well.

I edited the crntab file and included the above mentioned line, saved and came out of the editor. The script which is expected to be triggered at 1:50 is not getting triggered at that time.

Pls let me know what has gone wrong?

Thanks,
Sumesh
sumesh.abraham
# 6  
Old 02-20-2007
Check your mails for error messages from crn dealon.

Quote:
The cron daemon runs commands according to the crontab file entries. Unless you
redirect the output of a cron job to standard output or error, the cron daemon
mails you any command output or errors. If you specify a cron job incorrectly in
your crontab file, the cron daemon does not run the job.

Jean-Pierre.
# 7  
Old 02-20-2007
The script which i try to get scheduled is having isql command in it. The crontab file is set as follows.
Code:
* * * * * cd; script.sh > /tmp/result 2>&1

the file result in /tmp directory shows

Code:
isql: not found

I came to know that the isql is not set in the PATH environment variable.

Presently the PATH environment variable in my .profile file is
Code:
export PATH=$SYBASE_OCS/bin:$DSHOME/bin:$ORACLE_HOME/bin:/usr/local/bin/:/usr/ccs/bin:/usr/local/SUNWspro/bin:$PATH

Will including isql into this will solve the problem. If so, how can i modify it.

Thanks,
Sumesh
sumesh.abraham
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Help me with crontab

Hi, I am working with oracle, and want to make a scheduler program by using cron job.. I've done with shell script that calls oracle stored procedure. It works. However, when I call the script through crontab, it is failed. :( Here is the error message: Cron: The previous message... (2 Replies)
Discussion started by: rmard
2 Replies

2. UNIX for Dummies Questions & Answers

at vs crontab

Hi, can someone explain the differences between using the at and crontab commands. When would you use one command over the other? TIA Dom (1 Reply)
Discussion started by: domburf69
1 Replies

3. Shell Programming and Scripting

crontab

I have a crontab entry,but it is not working. Can anybody help me in this regard?? (2 Replies)
Discussion started by: Sourav_Paul
2 Replies

4. UNIX for Advanced & Expert Users

Help regarding crontab

Dear All jobs are scheduled in crontab . To view this I use crontab -l . But suddenly today I am not able to see any jobs that is being scheduled in crontab. when I type crontab -l , I am seeing nothing.I am not logging through admin user(i dont have it).But I can schedule jobs through... (3 Replies)
Discussion started by: tkbharani
3 Replies

5. UNIX for Advanced & Expert Users

Crontab help

hi, I run a .sh file using crontab. I need to know the path of the file . Previously when I run the file alone , i used "pwd" but now when using crontab it gives the temp directory of the file. Is there any way I can find the absolute path of the file when i execute it ? Regards, Ranga (7 Replies)
Discussion started by: r_W213
7 Replies

6. UNIX for Dummies Questions & Answers

crontab

hi all how to schedule the crontab file in unix? (2 Replies)
Discussion started by: ss4u
2 Replies

7. Shell Programming and Scripting

help with crontab

i have a ksh script that creates messages in a temp directory and then sends them out using the sendmail command and i'm trying to set it up to run every night with crontab. So the basic gist of the script is #create temp dir and messages ... #loop through each message and send using sendmail... (3 Replies)
Discussion started by: bob122480
3 Replies

8. UNIX for Dummies Questions & Answers

Crontab

How can I run "crontab" (parameters) every 6 hours on solaris machine? Thanks (1 Reply)
Discussion started by: gen4ik
1 Replies

9. UNIX for Dummies Questions & Answers

about crontab

dear all , does any one now how can i become sure that the crontab that i put was working successfully not by looking for thr result of the sheduled task but from a log for the crontab or something similar and i need to check that the cron i wrote is correct 00 15 * * 0,1,2,3,6... (2 Replies)
Discussion started by: habuzahra
2 Replies

10. UNIX for Dummies Questions & Answers

crontab

Hi I have a shell script which works fine at the command line and does works in crontab also but does not send the output to mail as other scripts do by default. 10 1 * * * /export/home/test/report_script by default should send the output to mail but the script runs OK and the output... (1 Reply)
Discussion started by: run_time_error
1 Replies
Login or Register to Ask a Question

Featured Tech Videos