01-03-2009
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi folks,
anybody there with suggestions on how to have an email sent to an address (if a certain job (jobA) ever dies. the concern is over the trigerring of sending the email (not the actual sending of the email)
1. is it possible for the job in question, jobA, itself do such a thing... (2 Replies)
Discussion started by: jacob_gs
2 Replies
2. Shell Programming and Scripting
I want to know if there is a way to make a certain set of programs start in order at system startup with cron or something else i dont know about. (3 Replies)
Discussion started by: rcunn87
3 Replies
3. UNIX for Advanced & Expert Users
Hi,
can you please help me with one problem?
There is some server, there are a lot of AIX applications which run on this server under different UserIDs.
These applications starts via crontab.
From time to time some application doesn't start.
What can this "not-action" be dependent on?
At... (5 Replies)
Discussion started by: Anta
5 Replies
4. Shell Programming and Scripting
Hi all,
Does anyone know if it is possible to enable/disable a cron job within a script?
I currently have a cron job which runs every minute but now it seems that sometimes I would like to turn this job off if a condition is met. I would then like to re-enable the job at a later date.
... (5 Replies)
Discussion started by: pxy2d1
5 Replies
5. UNIX for Dummies Questions & Answers
Hi All,
I have got a shell script that excutes some job and mails me the output as an attachment.
While running the script manually, its perfect.
when i am scheduling the job through crontab, i am getting the mail.
but the attachment but this is a blank file.
after the scheduler run, i can... (2 Replies)
Discussion started by: gotam
2 Replies
6. UNIX for Dummies Questions & Answers
Hi guys,
How can I specify the start and end time of a cron job. And my start time and end time are specified by minutes. For example, I want to set up a cron runs every 3 minutes from 18:40 to midnight. How can i do this please? Many thanks
Best regards,
Clu (4 Replies)
Discussion started by: clu
4 Replies
7. Shell Programming and Scripting
Hello,
I'd like to set a cron job that runs a shell script every 30 minutes or so to restart a java based service if the memory gets above 80%. Any advice on how to do this?
Thanks in advance!
- Ryan (19 Replies)
Discussion started by: prometheon123
19 Replies
8. Shell Programming and Scripting
Hi,
How can I write a cron job that runs the MySQL "show processlist" command and stores in log file every 5 seconds between 5 am to 7 am?
I know the lowest possible timing I can have in cron is a minute not second. If I need a script, I am looking for a solution in Bash.
I think this cron... (2 Replies)
Discussion started by: riomario
2 Replies
9. UNIX for Beginners Questions & Answers
When I power ON my T4-1, I got a prompt -> where I have to start /SYS and start /SP/console. How can I auto supply these two commands ? (3 Replies)
Discussion started by: z_haseeb
3 Replies
CRONTAB(1) BSD General Commands Manual CRONTAB(1)
NAME
crontab -- maintain crontab files for individual users (V3)
SYNOPSIS
crontab [-u user] file
crontab [-u user] { -l | -r | -e }
DESCRIPTION
The crontab utility is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in Vixie Cron. Each user
can have their own crontab, and they are not intended to be edited directly.
(Darwin note: Although cron(8) and crontab(5) are officially supported under Darwin, their functionality has been absorbed into launchd(8),
which provides a more flexible way of automatically executing commands. See launchctl(1) for more information.)
If the /usr/lib/cron/cron.allow file exists, then you must be listed therein in order to be allowed to use this command. If the
/usr/lib/cron/cron.allow file does not exist but the /usr/lib/cron/cron.deny file does exist, then you must not be listed in the
/usr/lib/cron/cron.deny file in order to use this command. If neither of these files exists, then depending on site-dependent configuration
parameters, only the super user will be allowed to use this command, or all users will be able to use this command. The format of these
files is one username per line, with no leading or trailing whitespace. Lines of other formats will be ignored, and so can be used for com-
ments.
The first form of this command is used to install a new crontab from some named file or standard input if the pseudo-filename '-' is given.
The following options are available:
-u Specify the name of the user whose crontab is to be tweaked. If this option is not given, crontab examines ``your'' crontab, i.e.,
the crontab of the person executing the command. Note that su(1) can confuse crontab and that if you are running inside of su(1) you
should always use the -u option for safety's sake.
-l Display the current crontab on standard output.
-r Remove the current crontab.
-e Edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. The specified editor must edit
the file in place; any editor that unlinks the file and recreates it cannot be used. After you exit from the editor, the modified
crontab will be installed automatically.
FILES
/usr/lib/cron/cron.allow
/usr/lib/cron/cron.deny
DIAGNOSTICS
A fairly informative usage message appears if you run it with a bad command line.
SEE ALSO
crontab(5), compat(5), cron(8), launchctl(1)
STANDARDS
The crontab command conforms to IEEE Std 1003.2 (``POSIX.2''). The new command syntax differs from previous versions of Vixie Cron, as well
as from the classic SVR3 syntax.
AUTHORS
Paul Vixie <paul@vix.com>
BSD
December 29, 1993 BSD