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

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Running cron on Cygwin to call notifu

I have installed Cygwin with cygrunsrv and Cron so I could use the benefits of using Linux-style scheduling in Windows. I want to call notifu from a cron job. I Installed cron as a service using the ...
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42 views

Setting up a watchfolder

I want to make a folder that I can put any video file into and have ffmpeg catch it and spit it out as an mp4 and remove the non-mp4 file. I have the following: for f in *.*; do ffmpeg -i input ...
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52 views

Performance loss when having too many files in /etc/cron.d?

Is there an amount of files in /etc/cron.d that would lead to worse performance? There are currently about 50 jobs in. In the future there can be up to 200 files in. Am I correct to expect the cron ...
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806 views

Set the from address on emails from cron/Set default from address for sendmail

As a normal user I can send email, either from the commandline or from PHP. But when a cron job has error output, sending of that email fails (I have a MAILTO=me@example.com at the top of the ...
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61 views

Many cron -f processes on unresponsive server

My Debian server had again become unresponsive and needed to be restartet (SSH login impossible, no longer transmitted log data to another server's MySQL Database, no new FTP connections possible, but ...
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86 views

Output redirection of cron jobs to an external file

I have been trying to redirect the output of a cron job to an external file but to no avail. I am using CentOS 7 headless. I created a small script to execute two commands. The script in itself ...
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110 views

cronjob + upstart for a node.js script

I can start my node.js script as a process like so: start demo because in /etc/init/demo.conf i have: respawn respawn limit unlimited exec node /home/engine/private_js/demo.js >> ...
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62 views

Stop automatic comments in my crontab

I have added the bellow cron jobs in my crontab : 0 5 * * * /bin/systemctl restart gb_subagent.service 28 13 * * * /home/comment.sh &>/tmp/errorcron.log 29 13 * * * bash ...
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312 views

which mail program will be used in crontab?

Platform: Ubuntu 12.04 LTS User: root Desc: If there is any output to stdout/stderr in execution, crontab will collect them and mail to correspond owner. In my case, it is 'root'. When I look at ...
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36 views

Sample cron job run but gave errors

I have sample script that backup my site. www folder and database. When is running It's get this error tar: unrecognized option `--transform' Try `tar --help' or `tar --usage' for more information. ...
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508 views

How to Schedule Tasks according to several Timezones

I need to use Windows Scheduler or any other app for setting jobs at a concrete time depending on destination country. That means scheduling a job at 7 am (UK Timezone), another at 7 am (US ...
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62 views

Cron deamon written in shell

I'm looking for a script in bash or ksh, that would do ... more or less ... the same as crond. The situation is, that our system administrator suddenly denied the use of crontab to all regular users ...
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131 views

Ncat throws errors while being run from crontab

I have a simple script set up on my OpenWrt box to check if one of the computers in a local network is streaming, and if it does, the script starts wget | madplay to play the stream. Script works ...
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252 views

Enabling crontab logging on openSUSE

I am trying to enable the crontab log on openSUSE 11.3. I searched the web but couldn't find how to do it. I only find information about Ubuntu. Tried editing the /etc/rsyslog.d/remote.conf file but I ...
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479 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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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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517 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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42 views

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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106 views

script -e and crontab or at

I have a shellscript I want to run via at and use script to capture a transcript. script -e was introduced in util-linux-ng 2.18 and returns the retval of the child process. I want to capture the ...
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15 views

How to make automatic hourly/daily/weekly snapshots with Btrfs

I remember working at a company with a NetApp server in 2003, and we had a snapshot directory in our home directories, with various snapshots appearing in it. I think there were snapshots for the last ...
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20 views

aws linuxAMI crontab ec2 to s3 backup command not working

I am new to Aws Platform and was trying to get Hands on experience on Command Line... but when i was configuring installed wordpress site...and syncing it to S3 bucket.. and for that my instructor was ...
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15 views

Cron job appears to work, but no changes seen in file

I have a simple cronjob that uses curl to download a file and save the contents to a file. The crontab file reads: 45 17 * * * /home/my_username/public_html/./update_md.sh where update_sh.md = ...
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10 views

Schedule the cPanel Transfer Tool

I'd like to schedule the transfer tool from cPanel, i'd like to do this daily to keep things synced with a failover backup server, identical to the first. I am looking at ...
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33 views

cron apparently requires a newline character on its own line at the end of the file

I'm trying to understand why cron is refusing to work with a certain crontab file. The manpage for crontab says: cron requires that each entry in a crontab end in a newline character. If the ...
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13 views

cron expression day of month AND day of week, instead of OR?

Probably not, but is there any way to make DOM and DOW in a cron expression be an AND relationship? For example: "0 0 1-7 * thu" Means: At 00:00 on the 1, 2, 3, 4, 5, 6 and 7th of every month and ...
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35 views

Can't open URL on remote display from cli over SSH

So I'm running an office 'dashboard' on a Raspberry Pi (wheezy) in my office. I've set up the pi to kiosk mode that automatically loads up the scrolling graphs page on boot. All day long it loops a ...
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19 views

Ensuring Cron Jobs are called from within the Server

Here is the information about my development environment: Windows Server 2012 R2 Standard 64-bit Operating System, x64-based processor Microsoft Visual Studio Professional 2013 .NET Framework 4.0 ...
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42 views

Loading kerberos keytab from root cron

When I run a script (see below) to load a kerberos keytab from a users cron it works just fine. Running it from root cron however a password is asked for the keytab and it aborts with: kinit: Generic ...
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32 views

I want to run a script that will disable my touchpad

I want run a script that will disable my touchpad and it will run every minute. 1. My script is: if [ `lsusb | wc -w` == '76' ] then `/usr/bin/xinput set-prop 16 "Device Enabled" 0` else ...
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17 views

How can I give time restricted access to certain Jenkins builds?

I have a Jenkins cluster for automated builds. I would like to let our developers run some builds to one of our UAT environments. However, builds from the developers should only happen when I'm ...
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196 views

Cron does not start: '/var/spool/cron' is not a directory, bailing out

I have an LXC container (The LXC host is Debian 8.1, and the container is Debian 4.0) running mysqld, sshd and a few other things. However, cron does not come up. $ /etc/init.d/cron start Starting ...
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10 views

Configure Cron log to show job number

I have several PHP cron jobs. Occasionally these jobs abort, logging with the appropriate process id etc. However the job number isn't included in the abort log message. Is there a way to configure ...
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47 views

How to determine what is updating my freedns/dyndns record with my current IP (on OS X Yosemite)?

Somehow, a while ago, I set a way to automatically update my DynamicDNS record on http://freedns.afraid.org/ with my Mac IP address. I don't remember how I set this or where should I look to disable ...
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29 views

High load after killing processes

My Linux home server (a RPi 2 with Raspbian) had a script running every 5 minutes from a cron job (an old rpi2pachube.sh). It usually runs a Transmission daemon. I just discovered that that script ...
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39 views

Red Hat Linux Cron Daemon Time Error

I have a legacy system that is running Red Hat Linux 5.4 and the cron daemon will not start. It stopped suddenly, I verified the CMOS time and the system time are correct. I've tried resyncing with ...
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166 views

Unable to run script, which emails me results, as super user. (returns: send-mail: 550 5.1.0 Not our Customer)

I have been trying to debug this for 2 days now, without success. This is the script I'm trying to run: #!/bin/bash emailaddress='my_username@gmail.com' output=`sudo rsync -av --delete ...
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91 views

CRON @reboot vncserver?

Is there any reason per-user cronjobs running vncserver @reboot wouldn't run? When I reboot the machine and look into /var/log/syslog, I see the jobs being run, then cron saying (CRON) info (No MTA ...
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124 views

Not able to open crontab -l

I am running crontab -l to view the crons on a RHEL server(v5.10) and getting the below error: crontab: error while loading shared libraries: libaudit.so.1: cannot open shared object file: No such ...
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153 views

How to run browser in background in Ubuntu

I am using Ubuntu 14.04, and PHP. I have 2 files: test.html - content java to test network update.php - the test file will post result to update database. I need to run and execute an URL address ...
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20 views

How can I queue a script to run the next time a system is up and connected to the internet?

I'm using mailsend (on a Mac) to send mail from the command line. I'd like to set this up such that I can execute a send command, but if my system is disconnected from the internet, that command is ...
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209 views

cron job monitoring script

greeting of the day!!! please help me a situation, i am trying to develop a script which provides me details which my cron job is commented or stopped which job is running or scheduled. like we ...
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55 views

Rsync delete issue

I implemented rsync to backup the data from the server to my local machine,and done it regularly by cron. It works fine but yesterday it deletes the files from the folders on my local machine but on ...
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87 views

How do I launch an hourly version of anacron?

I have a cron job (system update) that fires off every hour. However, I would like it to be reset every time the machine resumes from standby or hibernation. The command is already launched at each ...
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40 views

How do you commit changes to an XML file to source control when they are changed by the users of a web app?

An admin web app (closed-source, 3rd party) that we use generates XML files into the Linux server where it is running. These XML files contain application settings for a production application. Only ...
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322 views

Cron job not working due to wget error

I'm setting up a CRON job on my MediaTemple DV4 to generate a sitemap. To test I ran the command via the command line: wget ...
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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 ...
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157 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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543 views

How to set cron HOME environment variable?

I am using esmtp to send email as an output of cron job. The SMTP server and credentials configuration are stored under my $HOME/.esmtprc. However it looks like the $HOME env variable is set to '/', ...
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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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468 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 ...