Command used to schedule commands to be executed periodically. It reads a series of commands from standard input and collects them into a file known as a "crontab" which is later read and whose instructions are carried out.
Questions tagged [crontab]
34 questions
73
votes
6 answers
Cron.hourly won't run
Ok, So I've made my script, I dropped it in /etc/cron.hourly then I chmod 777 the file but it won't run (automatically). If I manually run it, it works fine. Do I need to do anything else?
Switchkick
- 3,963
27
votes
4 answers
Cron Job Not Running?
I have a crontab file that looks like this:
* * * * * /home/abliskovs/update/update.sh
However when I check the syslog for evidence that the job has run, there is nothing that might indicate that it ever ran. How can I check if it's running?
crontab…
Alex Bliskovsky
- 393
12
votes
4 answers
"Backup Intervals" in rsnapshot.conf?
A simple question about rsnapshot.
In order to perform daily backups I'm going to add lines to cron in my Ubuntu.
Then, why do I have also these lines in the rsnapshot.conf ?
#########################################
# BACKUP INTERVALS …
aneuryzm
- 899
11
votes
2 answers
Is there a programmable way to tell if the screen is locked?
I have lots of stuff in my crontab, including some that talks to my screen. If I'm not there for it to be notifying, I don't really want it to run.
Is there a way I can check to see if the computer is locked, so I can keep it from doing things when…
Dave Jacoby
- 517
10
votes
9 answers
How to run cron job when network is up?
I have some anacron jobs which run daily. The scripts update local bzr and git repositories. Naturally these scripts need working network connections. I'm on a laptop and often wired and wireless internet do not come up fast enough. This causes my…
Dima
- 9,955
7
votes
5 answers
What's wrong with my cron.hourly configuration?
Every hour I get an email with error like this,
Subject: Cron root cd / && run-parts --report /etc/cron.hourly
/bin/sh: root: not found
Contents of /etc/crontab is as follows, either I remove user "root" or not (6th column), I get…
grokus
- 631
6
votes
2 answers
How to activate this crontab?
I have a setup as below but its never getting executed.
$ chmod +x /var/tmp/myscript.sh
$ vim /var/tmp/crontab.sh;
* * * * * sleep(10); /var/tmp/myscript.sh
$ crontab /var/tmp/crontab.sh
Now just, noticed its not working. What am i doing wrong?
$…
user25165
5
votes
4 answers
execute script after desktop loaded?
I want to execute bash script on startup that opens several terminals in different workspaces.
Script works just fine if I call it from terminal, but it doesn't work if executed from crontab using @reboot:
#!/usr/bin/env bash
#1 make sure we have…
Stann
- 15,416
4
votes
2 answers
Is it bad to have a long list in my crontab?
I'm toying around with building an application to display messages on the screen on a desired intervals.
I want to use cron to achieve that and I am considering my options. The most naive approach would be to print the commands directly into…
Yotam
- 1,468
4
votes
3 answers
Backup bash script is not gzipping its tarball
I have a bash script that runs as a cron to backup files on the server.
#!/bin/bash
FILE=/path/to/backup_$(date +%Y%m%d).tar
tar -cf $FILE /backup/this /and/that /and/someotherfiles
gzip $FILE
When I run the script directly using:
sudo bash…
bcmcfc
- 848
3
votes
3 answers
Scripts in crontab don't get executed at all
i did something as simple as this:
crontab -e
* * * * * touch /home/alexis/hi.txt
crontab: installing new crontab
but it doesn't work at all; not mentioning more complicated scripts.
any idea what went wrong?
Alexis
- 51
3
votes
2 answers
setting editor for crontab -e , why always using basic vim?
When issuing crontab -e as root , i always got messages like the following (partial) , however , executing vim directly doesn't have problems at all.
$EDITOR was set to vim in /root/.bash_profile already.
%> sudo crontab -e
Error detected while…
daisy
- 6,712
3
votes
3 answers
Trying to stop a service with cron
On my Ubuntu 11.04 server when I try to run
service powernap stop
as a cron job with the root user, it fails and gives me this message in syslog
NAS CRON[10853]: (CRON) error (grandchild #10854 failed with exit status 2)
and this is emailed to…
Luke Stapley
- 53
3
votes
1 answer
How to use crontab, .netrc, and git push?
I am in the process of automating the backups from various servers to a central point then pushing those config changes into a git repo so I can track any changes over time. The rest of the scripts are working well, I can copy/rsync the files…
Jon
- 233
2
votes
1 answer
cron.weekly does not run
I have a shellscript in /etc/myprog/myscript.sh that I would like to run every week. Therefore I created a symbolic link in /etc/cron.weekly:
root@ip-10-190-199-197:/etc/cron.weekly# ls -ltr
total 8
-rwxr-xr-x 1 root root 895 2011-07-27 11:32…
Jeroen Ooms
- 637