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Shell Programming and Scripting

Enable & disable cronjob

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# 1  
Old 09-12-2007
Enable & disable cronjob
Hi All,

I am new to cronjob and need some guidance on this.

1) How do i enable a cronjob ?
Can it be done by "crontab mycronfile" or "crontab -e mycronfile"

2) How can i disable the cronjob?
Can deleting of the "mycronfile" disable the cron or do i need to perform "crontab -r mycronfile" ?
# 2  
Old 09-12-2007
1) yes, yes

2) crontab -r
# 3  
Old 09-13-2007
Hi,

Is there any way that i can check whether the cron has been disabled or enabled ?
# 4  
Old 09-13-2007
If you mean the cron subsystem then do a check of the process list and see if cron is running. Otherwise it depends on your operating system.


If you mean your tasks, then do "crontab -l", if nothing is listed that does not start with # then you have nothing scheduled.
# 5  
Old 09-19-2007
Hi ,

I can't disable my cron. Can you help ?
Below is the error msg

$ crontab -r cronline
crontab: you are not a valid user (no entry in /etc/passwd).
# 6  
Old 09-19-2007
1. What about

echo >empty
crontab ./empty

2. Are you listed in /etc/passwd ?

3. What are the rights to the /etc/passwd file? eg "ls -ld /etc/passwd"

4. What is the result of "id"?
# 7  
Old 09-19-2007
Does "crontab -r" remove all cronjobs regardless of which user id u are using ?
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