11-19-2014
How did you solve the problem?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
The object of my program is to take automatic backup on daily basis to different folders. I have created the respective folders. when I execute below given shell program manually it is working perfectly and taking the backup to respective folder.
#!/bin/sh
#script to take backup on... (1 Reply)
Discussion started by: jarkvarma
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2. UNIX for Advanced & Expert Users
hi,
i have the following line in the crontab
15 5 * * 6 /home/adw/BCE_ADW.pl
The problem is the cron job is not getting started automatically.
But this was working til last week. now it is not working.
what could be the problem. Any idea? (3 Replies)
Discussion started by: Suguna
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3. UNIX for Dummies Questions & Answers
Hi All,
I am editing crontab using -e option to add a new job
Below is the line
30 * * * * scriptpath
This job is not executing every thirty minutes.
I have checked, cron daemon is running.
What did I miss? Can some one help?
I am using cron shell..ksh (7 Replies)
Discussion started by: yabhi_22
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4. Shell Programming and Scripting
Hi there, I have over 2000 systems (mainly Solaris) and I want to write a script that inserts a new root cronjob on each of those servers. obviously just adding a line to /var/spool/cron/crontabs/root looks like the easiest way, but i really dont want to have to send a HUP to crond on all boxes
... (3 Replies)
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5. Shell Programming and Scripting
i have just installed a cron job to run at 3 in the morning once a week. It's difficult for me to test if it works because the email backup program takes the email service down before running the backup. I wondered if i could ask you gurus if this would work?
0 3 * * 0 ... (1 Reply)
Discussion started by: timgolding
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6. Shell Programming and Scripting
I've been bashing my head on the desk for 2 days trying to get this to work, but I've had no luck. I'll try to be as clear as possible in my explanation without dragging out the details. I'm trying to set up a cron job for user "john" which runs a script. This script initiates an ssh connection to... (5 Replies)
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7. Solaris
Hi,
Should the user jobs specified in crontab be running in background?
Cron daemon is already running in background. So I am not sure
whether should the jobs (output and error messages are redirected to file)
ran by it be explicitly stated to be run in background (& at end of command)
if one... (1 Reply)
Discussion started by: joe_x
1 Replies
8. Shell Programming and Scripting
Suppose user 'asdf' is not logged into server 'bbbb', but the server is up. User 'asdf' has cron job. Will it be executed? (1 Reply)
Discussion started by: thulasidharan2k
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9. Solaris
Hi ,
I have removed a cron for particular user , but cron job seems to be running even after the cron entry is removed. The purpose of the cron was to sendmail to user ( it uses mailx utility )
I have restarted cron and sendmail service still user is getting mail alerts from the cron job. And... (4 Replies)
Discussion started by: chidori
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10. UNIX for Dummies Questions & Answers
Hi there,
I need to create a crone job to backup certain files on my disk without root permissions.
Also if I will be able to edit cronetab then I need to know how to edit it with any editor other than vim :mad: (5 Replies)
Discussion started by: aelhosiny
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CRON(8) System Manager's Manual CRON(8)
NAME
cron - daemon to execute scheduled commands (ISC Cron V4.1)
SYNOPSIS
cron [-l load_avg] [-n]
DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'. The -n option
changes this default behavior causing it to run in the foreground. This can be useful when starting it out of init.
Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron
also searches for /etc/crontab and the files in the /etc/cron.d directory, which are in a different format (see crontab(5)). Cron then
wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When execut-
ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab, if
such exists).
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab
file is modified. Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
Daylight Saving Time and other time changes
Local time changes of less than three hours, such as those caused by the start or end of Daylight Saving Time, are handled specially. This
only applies to jobs that run at a specific time and jobs that are run with a granularity greater than one hour. Jobs that run more fre-
quently are scheduled normally.
If time has moved forward, those jobs that would have run in the interval that has been skipped will be run immediately. Conversely, if
time has moved backward, care is taken to avoid running jobs twice.
Time changes of more than 3 hours are considered to be corrections to the clock or timezone, and the new time is used immediately.
PAM Access Control
On SUSE LINUX systems, crond now supports access control with PAM - see pam(8). A PAM configuration file for crond is installed in
/etc/pam.d/crond . crond loads the PAM environment from the pam_env module, but these can be overriden by settings in the crontab file.
SIGNALS
On receipt of a SIGHUP, the cron daemon will close and reopen its log file. This is useful in scripts which rotate and age log files.
Naturally this is not relevant if cron was built to use syslog(3).
CAVEATS
In this version of cron, /etc/crontab must not be writable by any user other than root. No crontab files may be links, or linked to by any
other file. No crontab files may be executable, or be writable by any user other than their owner.
SEE ALSO
crontab(1), crontab(5), pam(8)
AUTHOR
Paul Vixie <vixie@isc.org>
4th Berkeley Distribution 10 January 1996" CRON(8)