Crontab is a short form of cron table. It is a configuration file that specifies shell commands to run periodically on a given schedule.

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7k views

Linux - check when crontab file was last amended

How can i get the last updated date/time of the crontab file. not when cron was last run but instead when was the crontab file amended last
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3answers
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Why does this crontab file only run once?

I have the following crontab file: 2 * * * * /bin/date >> /home/jon/date_from_cron.txt I think this means "run every two minutes". However, it only runs once. Shortly after setting up this ...
0
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2answers
116 views

crontab email is not working as expected. First I got the emails at gmail, now I'm not getting them

First I ran a simple test to see if I could get crontab to send me an email. I created the following line: MAILTO = my_email_address@example.com 1 * * * * /bin/echo "foobar" This worked as expected ...
2
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1answer
1k views

Set default editor for crontab -e invoked with sudo

I'm using Bash on Debian Squeeze. I just read this topic: change default text editor for crontab to vim I have exported both variables VISUAL and EDITOR to vim for normal user and for root. And this ...
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3answers
557 views

cannot access crontab with sudo after being added to /etc/sudoers list

My user "craig" is in the /etc/sudoers file on my CentOS 5.6 VM, however when I try to access the crontab using the command below I am presented with an error message: sudo crontab -e -u ...
0
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1answer
144 views

crontab script don't execute if console is closed

I'm using Debian 6.0.6. I edited root crontab a few days ago to add this line: 00,10,20,30,40,50 * * * * /root/Scripts/con_switch6.sh >> /var/log/con_switch_diario.log 2>&1 I'm ...
0
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1answer
1k views

Crontab is using some sort of hidden cache?

I used to have a crontab that ran like this * * * * * /usr/bin/php /var/www/vhosts/default/htdocs/agent/time_keeper.php > /dev/null 2>&1 It worked fine. Now I moved that php script to a ...
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2answers
2k views

Error setting up Crontab

Trying to set up a cronjob: 0 12 * * * /usr/bin/mysqldump --all-databases > /backups/mysql/`date "+%Y-%m-%d"`.sql Getting error: crontab: installing new crontab "/tmp/crontab.fuly8s":2: bad ...
0
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1answer
353 views

Why is this CRON failing to execute?

$ crontab -l # # m h dom mon dow command SHELL=/bin/bash * * * * * (/usr/bin/curl -s -XPOST http://internal.ip -H 'Content-type: application/json' -d 'data') $ ls -l /usr/bin/curl -rwxr-xr-x 1 ...
0
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1answer
3k views

Why is this cron not working?

I've made a script that backs some files up and puts them in a folder, When I do sudo /data/backups/scripts/nightlybackups.sh It works, I just want to make it a cron job so that it runs every ...
1
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1answer
795 views

Difference between 0,10 and */10 for crontab?

I wanted to run a cron every 10 minutes. What's the difference between the syntax 0,10 and */10?
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0answers
40 views

This weird behaviour from cronjob

I have set the crontab like this: */5 0 * * * /www/permitChat.sh and the /www/permitChat.sh is this: # We are setting the name of file # in the variable along with complete path. sFilePath=`date ...
4
votes
1answer
4k views

How do I make crontab generate a unique log each time it runs a job?

Here is the crontab job /usr/local/bin/python2.7 /home/scripts/script.py >> /home/scripts/logs/log.log 2>&1 How do I generate a new log every time the job is run? I am cool with ...
0
votes
1answer
120 views

Crontab as other user

I am running crontab as root user: screen -S konsola -X stuff 'say hello'`echo -ne '\015'` How do I run it as the user "nobody"? Only this user has screen with given pid, thats why I need it.
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1answer
2k views

Are there good reasons to have a single cron job run multiple comands [closed]

How would cron handle a job that executes multiple commands. As an example I have a cron job that looks like this. Which gets very difficult to read. 10 0 * * * firstscript.sh > first.log; ...
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1answer
184 views

crontabs hour specification */1 is that the same as *

I am looking for clarification with the cron tab that I am working with. some job 1 * * * * some job 1 */1 * * * Are those jobs the same? The job will run the first minute every ...
0
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1answer
873 views

Is there a way to predict the next execution time for a crontab job?

I'm configuring crontab jobs on an Ubuntu server and I'm trying to figure out how can I predict the next execution time for my jobs individually. It's just a matter of making sure I configured the ...
0
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3answers
3k views

Load login shell inside user cronjob

I'm trying to run a rake task using a scheduled cronjob. My crontab looks something like this: 0 1 * * 1-7 /bin/bash -l -c "cd ~/jobs/rake && rake reports:create >> ...
0
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2answers
609 views

Cron job for moving directories older than 24 hours

Well, what I want to do is The cron should run every hour or so It should move the directories in a folder /disk1/data/ older than 24 hours to /disk2/data/ The directories moved should contain all ...
0
votes
1answer
1k views

Mac OSX 10.6 Cron Job Not Running

I tried setting up a crontab on my Mac, but it's not running for some reason. Here's what I'm trying to run: */2 * * * * /BackupScript/backup.sh I have it set to every 2 minutes currently for ...
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2answers
550 views

Why cron saves at /root, when should at /var/www?

Why my cron */1 * * * * /usr/bin/php /var/www/query/query.php &> /root/querylog.log saves query.php output in the /root/ folder? (this script shall save *.txt at its location) It should do so ...
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8answers
16k views

Run a cron job on the first Monday of every month?

I'd like to run a job from cron at 8.30 on the first Monday of every month. The cron Wikipedia page says While normally the job is executed when the time/date specification fields all match ...
1
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1answer
1k views

sudo access to view/edit a crontab

I wish to be able to edit, or at least view, a crontab that is on a server. Should I not be able to run this to do so: sudo crontab -u root When I do, I get this error: Sorry, user crmpicco is ...
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2answers
827 views

Crontab Error Emails: Set Sender to Root Using -f

For a crontab entry in this format, */1 * * * * /usr/bin/php /app/<userid>/command --flag='value' I see this message emailed to <userid>@host (and view via mail) at one per minute: ...
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2answers
3k views

Issue pushing file from linux to windows with smbclient

I have a file located on my linux box that is generated by a python script, the file is dropped inside of the /root/ directory My bash script looks like so: #!/bin/bash # Run the HR Data feed cd ...
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1answer
1k views

How do I make cron run a Java GUI application?

I have a script which runs a Java GUI application using "java -jar app.jar". I have added the script to the crontab to run every minute, check the processlist if the application is up. If it isn't it ...
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0answers
1k views

Why does cron task run twice?

I have a task that should run each day in Ubuntu10.04. So I use crontab and copy the scripts of the task to the directory /etc/cron.daily. Here is the my crontab: # /etc/crontab: system-wide crontab ...
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0answers
515 views

What happens if cron.daily is not terminating

Today I had to realize that some cron jobs werent run on my server! In the log files I find this: Mar 13 03:30:01 osp-server anacron[7261]: Anacron 2.3 started on 2012-03-13 Mar 13 03:30:01 ...
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3answers
3k views

What do slashes “/” mean in crontab?

I'm seeing slashes in some crontab examples, I don't understand what they mean? Check this one out for example */10 * * * * /home/ramesh/check-disk-space ...
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3answers
2k views

Simple Cron task in Mac OS X Lion

I am trying the Cron facility in Mac OS X Lion, but it does't seem to work. The crontab looks like this: MacBook-Air-de-Vincent:run vincentle$ crontab -l MAILTO=bxxxxxxxx@gxxx.com * * * * * (echo ...
8
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2answers
4k views

Multiple crontabs for one user

is there a way to use multiple crontab files for one user? Thinking something along the lines of crontab file per project instead of crontab per user... Any help is appreciated...
0
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2answers
2k views

How to recover crontab jobs from filesystem

On my system I have fedora 13, which I can't get to boot right now. I'm now running ubuntu 11.10 from a different partition. From ubuntu I can read the fedora partition. In fedora I had some cron ...
2
votes
5answers
421 views

randomised cron command

I'd like to write a cron command so that a job would execute once at some random time during the week - is this possible without having the crontab modify itself? I've considered writing a function ...
0
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1answer
73 views

I can not find specific cron running at *:21 and *:56 on Debian

I am frustrated. I have two mystic crons running on our server, that I can not find by doing crontab -l. The good thing is these crons are sending mails. That is how I know those are running at :21m ...
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0answers
169 views

Crontab crash when running a script that insert a lot of lines in MySQL

My crontab is crashing when I run a script that insert alot of lines on MySQL Database, but when I run a script that inser few lines it run properly, is there some configuration file of cron? Maybe ...
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5answers
7k views

Disable cron jobs for a specific user

I have a list of jobs in the crontabs for user1, user2. I want to prevent the jobs of user2 from running. I tried listing user2 in cron.deny, but that only prevents him from accessing his crontab. ...
2
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2answers
1k views

Cron job not working consistently

I have a cron job: 1 0 * * * /usr/bin/wget -q -O /dev/null 'http://123.456.78.90/index/parsedata?&today=1' It should gather a bunch of data from the DB at 12:01am each day, organize it for use ...
1
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1answer
890 views

Background Jobs from cron

I am running a cron on every two minutes. From the cron I am running other shell scripts in background with "&". After cron exits spawned shell script process still runs, this is desired behavior. ...
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0answers
234 views

Why isn't crontab working for me? (Ubuntu 11.04)

I can't get the crontab jobs running. I've checked /var/log/syslog and the scheduled jobs aren't there. I've edited the jobs with sudo crontab -e so they are created for root. This is how my jobs ...
0
votes
1answer
251 views

crontab -l output to file

I want to be able to output my current crontab to a file, in order to check and append it automatically. crontab -l > somefile creates an empty file. There must be a simple way of doing this, ...
1
vote
1answer
7k views

Crontab script on Mac OS X Lion does not work anymore

I have a problem with cron tasks. Previously this script worked fine on Mac OS X 10.6 server, but when I initialize it on Lion (client), this script stopped working. Basically, this .bat file calls ...
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vote
2answers
3k views

Open a terminal from a Crontab

How do I get a gnome-terminal window to open from a crontab? I have tried this: * * * * * /usr/bin/gnome-terminal * * * * * source /home/user_name/.bashrc ; /usr/bin/gnome-terminal * ...
4
votes
1answer
5k views

crontab day of week vs. day of month?

I added this to /etc/crontab on a few different linux & freebsd systems: # monthly reboot: 3rd Tuesday of every month 56 07 15-21 * 2 root /sbin/shutdown -r now I want a reboot on the 3rd ...
4
votes
2answers
13k views

Bad minute in crontab?

I get the following error in my syslog: Oct 17 13:14:03 tracker cron[873]: (*system*) ERROR (Syntax error, this crontab file will be ignored) Oct 17 13:14:03 tracker cron[873]: Error: bad minute; ...
3
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1answer
116 views

If I restart crond, will scripts get interrupted?

I am changing my /etc/crontab file. When I execute service crond restart will my jobs/scripts that just begun executing by crond be terminated or not ?
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votes
2answers
2k views

How to set CRON to execute a php file outside of a public html folder?

I have a php file located at, let's say, for example: /data/web/process.php This file is not publicly available (no virtual host is running in that folder, but apache is installed). I need to ...
2
votes
2answers
245 views

How can I change the directory a command thinks it is running in?

How can I run a command that is in a different directory so that the command thinks I've ran it in the current directory? If a command is using basename() or argv[0] (or whatever it's called) to get ...
3
votes
4answers
1k views

How do I add a job to cron?

So, here's what I did: Logged in as root via Shell Typed crontab -e Typed */30 * * * * /path_to_website/cronjobs/cron.php And now what? How do I save it? I just closed Putty and then logged back ...
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2answers
1k views

Do jobs in root's crontab still execute when logged in as another user?

I have edited my root's crontab. Will root's cron jobs still run when I'm logged in as another user?
2
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1answer
480 views

Cancel a cronjob or an automatically loaded process on OS X

I'm currently being bugged by Mail.app popping open every friday at the same time and simultaniously I receive mails from an app iBackup which I used to have installed. I would like to get rid of it ...