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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5answers
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How to use crontab to run a script as nobody

This is on a CentOS machine. I'm trying to run a script as user nobody (or as a user with minimal permissions) at a certain time every day. Here is nobody: [root@CentOS % ~] grep "^nobody" ...
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 ...
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 ...
2
votes
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 ...
0
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2answers
547 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?
3
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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?
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4answers
3k 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]' ...
0
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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, ...
23
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1answer
43k views

Running program every 2 minutes with crontab

What does 2 * * * * means in crontab context? I want to run my program every 2 minutes; is that what 2 * * * * means?
1
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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 ...
1
vote
1answer
127 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 ...
3
votes
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 ?
0
votes
3answers
3k views

Run a shell script using cron

I have this FeedIndexer.sh: #!/bin/sh java -jar FeedIndexer.jar Just to run FeedIndexer.jar which is in the same directory as the .sh, I would like to run it using crontab, so I did this: # ...
2
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
1k 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 ...
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 ...
2
votes
1answer
481 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 ...
1
vote
1answer
284 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: ...
0
votes
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 ...
1
vote
1answer
345 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 ...
2
votes
2answers
11k 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 ...
7
votes
2answers
3k views

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 ...
0
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2answers
1k 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.
0
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2answers
141 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?
2
votes
3answers
8k views

Crontab not working in Ubuntu 10.04

I installed it in a machine at work and it wouldn't do anything, no matter what I did. So now I have it on virtualbox at home and it also doesn't work. Here's what I'm trying to do: Have a file on ...
0
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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 - ...
2
votes
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 ...
2
votes
2answers
3k 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 ...
4
votes
2answers
4k 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 ...
0
votes
1answer
55 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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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 ...
0
votes
2answers
7k views

How to stop all instances of cron?

I have a cron job that executes a rake task in rails. I noticed in the log that it was running the task 4 times everytime it was executed. The problem is that there are 4 instances of cron running. I ...
0
votes
1answer
561 views

Running an Automator task at night

I've just created an Automator workflow and I'm using crontab to execute it at night. The problem is that, after a while, the machine is going to sleep and a password is required (this is the intended ...
0
votes
2answers
837 views

Following script doesnt run as cronjob

snailmail.sh #!/bin/bash echo "Test" >> /tmp/out /usr/bin/kdialog --title "MAIL RECIEVED" --msgbox "mail recieved!!" crontab -e #CronJobs located in $HOME/cronjobs/* * * * * * ...
0
votes
2answers
947 views

cron job not working

It is little weird now that cron job is not working as i have set. I have set weekly job to send email but i am receiving multiple emails daily. Below is my code; # sends email every monday at 4:00 ...
1
vote
1answer
146 views

Making files created by a cronjob readable by apache

A software package I installed on my Fedora box has an associated cronjob. This cronjob creates html files that need to be readable by apache. At the moment, the files are not readable because they ...
1
vote
2answers
2k views

Why are some of my cron jobs not sending deamon emails?

My crontab: PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=admins@boingoboingo.com HOME=/ LD_LIBRARY_PATH=/usr/local/lib/ # .---------------- minute (0 - 59) # | .------------- hour (0 - 23) # | | ...
-1
votes
2answers
113 views

What does everyone have running in their cron? [closed]

In cron I run a bunch of regular maintenance stuff on my production server. I was wondering what everyone else runs in theirs. Is there anything novel? Is there anything very basic that noobs ...
2
votes
1answer
1k views

Cron job on Mac not running during sleep

I have a cron job that will mail a list of all Google Tasks to my email address daily at 7am. (http://privacylog.blogspot.com/2010/07/api-for-google-tasks.html) I am running this on my laptop which, ...
0
votes
3answers
372 views

How to run a job on first login of each day using cron or something similar?

I need to run a script when i login for first time in a day. I may reboot or shutdown and then power on during the day. But i do not want the job to run during those power ups. It should run only once ...
1
vote
1answer
541 views

Linux cron job error

I have setup a cron job to run a PHP file every 30 minutes: lynx -source public_html/scripts/file.php The result comes through to an email but seems to get this error: Can't Access ...
1
vote
3answers
448 views

Ubuntu Crontab error

I want to list files at 12h01. How can I set my crontab to do this? pedro@Pedro-PC:~/PL/trab4$ crontab -l # 01 12 * * * ls -l
0
votes
0answers
467 views

user crontabs don't work, only /etc/crontab

Hi when I use the command crontab -e to set up cron, the commands get triggered (according to syslog) but nothing happens. Also if I run sudo crontab -e. The only way to actually get cron working ...
3
votes
2answers
2k views

stdout and stderr of script doesn't get redirected when executed by cron

./script &>> log.txt I get a nice logfile, but if I have the same command executed by cron, lets say the crontab looks like this: * * * * * '/home/user/script &>> /home/user/log.txt' ...
0
votes
1answer
260 views

linux crontab issue

I got this funny problem. I have an entry in the in cron like this 50 15 * * * /pmecs/log/lsmon/techsupportscript.sh 2>/pmecs/log/lsmon/cronerror.log Now, from what i know, this is correct ...
-1
votes
2answers
111 views

unable to use cron tab

I am using crontab on unix shell using putty to connect to unix server unable to use crontab i scheduled crontab at say * * * * * cat > new < new1 doesnt work I works only in home directory of ...
2
votes
1answer
785 views

How do I compress a directory on a Unix web server and email it on a sheduled basis?

After hearing about various high profile website creators getting stiffed recently after hardware failures on their servers I would like to implement a backup strategy on my websites. I have cPanel ...