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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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
2k 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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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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367 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
1k 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
1k 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 ...
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2answers
2k 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...
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2answers
1k 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
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5answers
271 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
66 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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159 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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4answers
4k 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 ...
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1answer
658 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
229 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 ...
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1answer
225 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, ...
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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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2answers
1k 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
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1answer
3k 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
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1answer
8k 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; ...
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1answer
114 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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2answers
1k 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
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2answers
223 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 ...
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4answers
915 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
907 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
373 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 ...
2
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2answers
982 views

Crontab : Permission denied

My crontab (running as user) contains the following command 00-59 00-23 * * * /usr/bin/smbget -R smb://192.168.10.32/Data -u USER -p PASSWORD But I am getting an error as You don't have ...
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1answer
314 views

Cron not executing jobs

I'm having trouble making cron work. I edit my cron jobs doing sudo crontab -u myuser -e sudo crontab -u myuser -l prompts my cron tables: ##### */1 * * * * /home/myuser/Projects/scripts/cron.sh ...
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1answer
297 views

View the event list of a cron file

I have a relatively complex set of cron jobs running and it would be really useful for me to ask the system for the list of the next n cron tasks that will be performed. So given a particular ...
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2answers
10k views

Difference between /etc/crontab and “crontab -e”

What is the difference between the crontab located in /etc/crontab and the crontab that can be edited using crontab -e?
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2answers
2k views

Only email on cron errors for jobs in cron.daily, cron.hourly, etc

I have several cron jobs that run (in /etc/cron.daily, /etc/cron.hourly, /etc/cron.weekly, etc.) and email root@localhost with the results. I'd like to stop those emails if the jobs are succeeding, ...
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2answers
8k views

How to create folders according to date in Linux?

Is there any other short/easier and smarter way to do the following in Linux? cd /home/abcd/dammi mkdir $(date +%Y-%m) cd $(date +%Y-%m) mkdir $(date +%d) # RESULT : /home/abcd/dammi/2011-05/26 cd ...
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2answers
530 views

How to setup crontab on dedicated server to dump WordPress MySQL database and email it to a Gmail account

I know I can do a mysql dump for my WordPress databases on my dedicated server. But I want to do this automatically, and I want the dump to be emailed to my Gmail account. Is this even possible?
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2answers
120 views

different way of editing crontab

I have two ways editing crontab 1. edit /etc/crontab, then restart crond 2. crontab -e crontab in both cases I am logged in as root. what are the differences?
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876 views

How to get log of running cron job

How can I tail the running cron job, so that I can come to the conclusion that my job is going on.
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2answers
1k views

RHEL6 Crontab doesn't work properly?

In RHEL6 root's account I have crontab job: 30 6 18 4 1 /sbin/init 6 It worked fine on the 18th of April and properly restarted my system, BUT it also restarted my OS at 6:30 on next Monday - ...
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1answer
1k views

Deleting files and emptying trash using cron

I'm new to making crontab files and I decided to try and make a job that would delete the contents of my Downloads folder, and then empty the trash. This is what I have: 0 9 * * * rm ...
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2answers
903 views

From what context is a cron task executed?

I am asking this question after royally destroying a Linux box. Let me give you some background so you know where I am coming from. I currently have (well... did have) a RedHat Linux box running ...
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2answers
2k views

How to execute a php file with crontab?

I have ubuntu setup with lamp and I was wondering what I would type to start a php page say at 2am everyday. I am still studying how crontab works so I can't test to see which one works. So if I ...
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2answers
1k views

How to specify default MTA?

I'm trying to use the MAILTO function in crontab on my mybookworld (it's a NAS) I've installed a rather unfamiliar (i think) MTA: ESMPT With mutt (console based email client) it works perfectly. But ...
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1answer
242 views

How can I automate or script daily downloads for any new anti- virus databases, and then have the program scan my drive?

(I know there are much better softwares out there for the Mac so please don't go there! The politics of this company dictate which Anti virus we have to use) Anyway without any further wait: ...
3
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3answers
6k views

how to run cron jobs on GMT not local time?

How can I make cron jobs run on GMT, not local time? this is my crontab file: #m h d m wday command TZ=GMT 5 0,6,12,18 * * * ~/Documents/bash/transfer.sh my jobs seem ...
2
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2answers
3k views

Cron ignoring an update to crontab

I've commented out a line in the crontab on a debian server, which I guess was there by default yet was causing me to get error emails every hour: # m h dom mon dow user command 17 * * * * root ...
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1answer
54 views

Cron that needs more time than he's allowed to

My crontab runs a cron every 5 minutes... If the cron needs more than 5 minutes to run, can this be a problem?? Can the problem be with the commands the cron runs? Thanks for your answer ;-)
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2answers
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cron can't read PYTHONPATH environment variables?

I have added to the PYTHONPATH on my server's .bash_profile file. However it appears that cron isn't reading from it because I am getting import errors. If I run the exact command cron calls on the ...
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4answers
686 views

cron jobs made in cPanel don't show up in PuTTy

Why don't cron jobs, that I have made in cPanel, show up when I use PuTTy and type crontab -l?
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0answers
1k views

Running a bash script at random times using cron job

I need to monitor intrusion on a server at (relatively) random intervals. For that I have set up a cron job to run every hour. I have written three scripts: wrapper script that calls a ...
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4answers
2k views

mysqldump cron not dumping

I am attempting to setup a cron to use mysqldump once a day. There is no output and I cannot see any database usage while watching top. The crontab is: mysqldump [database] -u[user] -p'[password]' ...
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1answer
118 views

Cron jobs and clipboards

Pbpaste doesn't seem to work as expected when I run it from a cron job. I have an applescript that opens a PDF file in Preview and sends it the copy command and then closes Preview. Next I'd like to ...