cron is a task scheduler based on clock time that runs on Linux-based machines.

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crontable OR conditions

Crontable parameters seem to function as 'ands' conditions. So the example 0 9-5 * * 1-5 Runs when the conditions are met "minute is zero AND hour is between 9 and 5 AND day is between monday and ...
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149 views

Will my weekly cron job work?

I'm just getting back into bash scripting and I want my cron job to run every 15 minutes between 9.15 and 10 PM. I've checked the script works, but I don't know if it's the right command: ...
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2answers
4k views

ssh Permission denied only in cron job

Having a very strange problem. I've created a small bash script which runs a command on a remote host via ssh (using public key authentication). When I run this script manually from the command line ...
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2answers
711 views

Auto suspend after X minutes to stop myself procrastinating

Right now, I'm using a line in /etc/crontab to run pm-suspend every 30 minutes, but I would like an application displaying a warning before suspending (for example a countdown in the taskbar). An ...
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426 views

SShfs and security

I have following questions: If I mounting sshf mail@host:/home/mail ./foo Is it any way to restrict possibilities of mounting and to not give shell access? All I want is remote, secure storage for ...
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4answers
4k views

how do i run a script 5mn after startup?

I have severals RoR websites running on my webserver and I need to run a ruby script at startup. So, I puted a bash script in /etc/init.d witch call a ruby process. Unfortunatly that ruby process ...
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4k views

crontab - /bin/sh: wget: command not found

I want to set up a crontab on my Macbook Pro running Lion. I run the usual crontab -e and provide a quick job to see if everything is working ok --- */10 * * * * wget -O - -q -t 1 ...
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498 views

Windows app to grab webcam snapshots?

I want to periodically capture an image from a webcam attached to a Windows PC, and upload it to a Linux server on the network (preferably FTP, could be SFTP or even Samba). The images have to be ...
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443 views

“ssh_exchange_identification: Connection closed by remote host lost connection” when running cron job

I have a Ruby script that connects to a remote machine via ssh and executes a command. The script runs fine when I just run it in my terminal. In my crontab, I have 1 * * * * /bin/bash -l -c 'ruby ...
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403 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 ...
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524 views

Is it possible to add directories under cron.d?

I wanted to partition a single cron file into separate logical units and place them in subdirectories. One folder under cron.d would have all crons associated with say, removing certain types of ...
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416 views

Inconsistencies with SCP for Ubuntu and Windows Server 2003 (using CygWin 1.7.x.x)

Some days ago I was able to scp to the remote server from my windows server 2003 using cygwin to copy the id_rsa, using scp (id_rsa.pub location) user@example.com now it(scp) seems to be not working. ...
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444 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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1answer
263 views

What might cause cron jobs to occasionally not run or complete?

In my crontab, I have set MAILTO and a bunch of cron jobs (5-10 jobs). These cron jobs usually run fine and I get emails for them. Most of these jobs consistently run as expected. Emails and ...
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14k views

Why is my crontab not running

I have this cron 38 * * * * /bin/bash -l -c 'cd /var/rails/site/releases/20120705144335 && script/rails runner -e qa '\''Play.load_lists'\''' I have this cron under the a different user so ...
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2answers
144 views

Cron Job that restarts crashed game

So I'm hosting a game that is very tempermental and can crash a lot on Linux, I made this cronjob to restart the screen and game should it fail: #!/bin/bash for t in {1..12} do if [ -z "$(ps -C ...
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2answers
873 views

crontab -e fails to start

whenever I try to run crontab -e I'm getting errors such as: no crontab for banana - using an empty one /tmp/crontab.oeFm1e: Invalid argument Is there any way to edit / install the file?
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33 views

Run checkgmail as a cron job [duplicate]

Possible Duplicate: How do I make cron run a Java GUI application? I use checkgmail at work constantly, but this application has a memory leak, and after a week (I never shut down my work ...
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1answer
529 views

Schedule bash script for one time use on OSX

I'm trying to do a little script that, as a function, will take a file and date as input and delete that file on the specified date. So I only need it to schedule to run once, and that's it. I'm on ...
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1answer
2k views

How to delete directories older than one hour (cron job)

My application creates directories when user performs certain action. These directories are stored on my machine for exactly one hour and than are deleted. Now I would like to move the 'deleting ...
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1answer
107 views

In OS X Lion under zsh, how can I set up a /Users/username/tmp directory which deletes after X days?

I'm new to scripting and regular jobs on OS X, so appreciate the help in advance. I'm looking to have a tmp directory in my homedir, as in /Users/username/tmp which I can use as my "downloads" ...
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1answer
2k views

Is there a aliases file for sSMTP?

I installed sSMTP for sending emails from command line. I want to create some alias for cron jobs: $ sudo vim /etc/aliases # append this line at the end myname: root $ newaliases ...
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5answers
7k 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 ...
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1answer
9k views

How to use @reboot for crontab with delay

In crontab, I can use @reboot to run a command after the system reboot. Is there a way to do this with an delay, i.e. run a command after 10 minutes of reboot?
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441 views

cron uid:gui for every username

So in the nutshell : There was user John with 502:502. After i deleted John and recreated him, his UID:GID changed to 504:504. Cronjobs are still running under the John's crontab, but when the ...
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2k views

How can I perform a cron job every minute?

Are the following cron configurations identical? * * * * * 0 * * * * 1 * * * * I'm looking for a configuration that will run the job every minute.
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1answer
919 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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1answer
565 views

“Permission denied” when trying to use RVM with Cron

I am trying to employ the method descibed here. My crontab: # m h dom mon dow command @reboot /home/qe2user/.rvm/environments/ruby-1.9.3-p125 /home/qe2user/Ruby/test/prog.rb > ...
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342 views

Running cronjob on specfic hours

How do i setup a cronjob to run every hour except from 11pm until 1am ? Because during that time, the system is doing maintenance. Cheers
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1answer
168 views

Cron view on VPS

How can I view all cron jobs scheduled on my Linux Ubuntu VPS? When I use crontab -l I do get a list of cronjobs but I cannot see the ones that are scheduled by WordPress, how can I also see the ones ...
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1answer
395 views

How to set-up date for cron weekly backup?

I'm writing a command for cron to do automatic backups for my flashdrive. I use tar ... -N <some date> to make the backup. The issue is how to write the command which gives me the right date. ...
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10k views

Set a cron every certain hours between certain hours

How can I set a cron to run every 2 hours between 8 am and 5 pm for example? Is this possible?
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365 views

Convert cronjob to launchctl plist

I should convert this cronjob to a launchctl plist. Is this possible? 0 8-18 * * 1-5 /usr/bin/curl -s --data "par1=a&par2=b&press=OK" http://mydomain.com/file.php /dev/null
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1answer
152 views

Cron job once a minute for one hour a day

Is there a way to run a cron job once a minute for an hour every day? I know I can probably make 60 cron jobs to do this but that would make it difficult if I ever needed to edit the job.
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928 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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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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1answer
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what is run-parts in /etc/crontab, and how do I use it

I have been digging through my Linux system. To try and understand how it all works In the /etc/crontab file. I see the following # run-parts 01 * * * * root run-parts /etc/cron.hourly 02 4 * * * ...
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1answer
439 views

How is crond daemon started without an init.d/chkconfig entry?

I'm running a sandbox server with Fedora 15. I've gathered that since my crontab file has no entries (ie. ***** run-parts /dir/) for scheduled run-parts, it is not currently configured. The ps command ...
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1answer
378 views

How did I wipe out all my cron jobs?

I have accidentally wiped out all my cron jobs. I'm not sure what I have done. I don't remember deleting entries from it by issuing crontab -e. What are the possible ways that the cron jobs can be ...
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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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1answer
487 views

Debian Linux cron stubbornly refuses to run at right time

I have a Debian Linux server, recent install. It has this cron job: 7 1 * * * /do/something/important.sh As I read that, it should run at 1:07am. Instead, it runs at 5:07pm. So, wrong ...
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1answer
534 views

Need to set cron for random intervals with iMacros

I am trying to learn about cron for iMacros but I don't know where to look. Google was no help. Basically I have script I wrote, a series of commands, like this: Line 1 Line 2 Line 3 etc. What I ...
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1answer
643 views

Shell script of mysqldump works fine when run manually, but does not run in the cron job?

I have a shell script to get a MySQL database dump. This script works fine when run manually #!/bin/sh fqn=/home/Mysqluser/daily_dumps/bookstore_`date +%Y%m%d_%H%M%S`.sql.gz mysqldump -u root -h ...
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query a URL every H hours for changes in the results?

How can I query a specific URL (mostly html and js) every H hours for changes in html content, which is mostly an html table with some header, and have the results fed to an RSS? This URL in question ...
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2answers
861 views

Writing a cron job to email myself

How would i write a simple cron job to email myself a message at a certain time? Also is it possible to create a cron job without root access. I'm trying to use my school's server?
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429 views

What is the difference between “periodic” and “cron” on OS X?

I bought a book on OS X and it says that launchd now control the scheduling of cron tasks, it this true? Also it says that if I place commands in /etc/daily.local that they will execute after the ...
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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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5answers
243 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 ...
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1answer
2k views

How can I write a cron job to archive my log files every night?

I assume this is relatively easy but my shell scripting isn't that great so I'm hoping to get some help. I have a task which runs every hour and appends its output to a log file. I'd like to move ...