Cron is a time-based job scheduler in Unix-like computer operating systems. Cron enables users to schedule jobs (commands or shell scripts) to run periodically at certain times or dates.

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2answers
282 views

Why cron job is not able to open X display connection [closed]

I have a java app rendering some sprites using LWJGL and OpenGL. It works fine until I move it to remote virtual machine with no phisical graphic card, Mesa 3d with related stuff is used to emulate it ...
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1answer
86 views

Replace of cron job/cron tabs— Windows Scheduler [closed]

I want to know that there is any way to create an script on windows machine in PHP that should run after an interval, let's say every after 15 minutes. Currently I'm doing it using javaScript, but ...
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1answer
3k views

Scheduled Task issue - /usr/bin/php/: No such file or directory [closed]

Can't get it working, I want to set up a cron job for a domain user in plesk 11.5, but seems that there's a problem to find the php executable. The command is: /usr/bin/php/ -f ...
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votes
1answer
290 views

Bash and cron error [duplicate]

The following cron job fails to execute. What's wrong with it? It works fine when I run it directly from the shell prompt. www-data@etl:~$ crontab -l SHELL=/bin/bash MAITO="" 0 5 * * * export ...
1
vote
2answers
713 views

Cron getting timeout when attempting to access url (wget).

I'm sure this is simple and I've been digging but no answer is quite as specific as I need it to be. The goal is easy, have Cron hit a url on my server every 5 minutes. All of that is set up and ...
0
votes
1answer
588 views

How to restart PHP-FPM from cron?

I'm trying to restart PHP5-FPM periodically using Cron, but am having no luck. I can restart manually with no problems, using service php5-fpm restart or /usr/sbin/service php5-fpm restart However, ...
0
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4answers
452 views

cron job executing script [duplicate]

I have created a script that works as expected in shell but cron job does not seem to run it. when I check my cron mail, I see that it prints "hltv is not running" but does not create a screen ...
1
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1answer
272 views

Reliably running background operations

I'm looking for a recommendation on how to reliably run background operations. I have many servers posting operation messages to AWS SQS, and I have another server which will run these CPU intensive ...
0
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1answer
28 views

Cron environment inconsistency [duplicate]

I've seen some inconsistencies between the cron environment and my environment. For example, I have installed paver (pip install paver) in my environment and calling paver works paver. Using paver in ...
1
vote
3answers
3k views

keeping a remote server up to date with git repo

So, I'm aware of git hooks, and will be looking into those next, but want to write a simple bash script, run via cron, to keep a repo on a remote server up to date. I imagine it working like this: ...
0
votes
1answer
870 views

Adding OpenVPN client connection to cron [duplicate]

I wrote simple server-client OpenVPN config files: server.conf dev tun0 ifconfig 10.8.0.1 10.8.0.2 client.conf dev tun0 ifconfig 10.8.0.2 10.8.0.1 remote 192.168.0.123 which basically is a ...
5
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3answers
2k views

Cron expression: difference between 0/1, 1/1 and *

In a cron expression, what is the difference between 0/1, 1/1 and * ?
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3answers
210 views

crontab cannot find script

I have a cron job that runs under my user once per night. I installed it using crontab -e and a by adding the line: 0 1 * * * /home/username/diskreport.sh The crontab is set up so that ...
3
votes
1answer
297 views

Disable mailing in cron globaly

The web is full of suggestions how to disable mailing in cron like asked here stop linux from emailing me cron errors?. Is there really no global config flag I can set to disable mailing in cron for ...
0
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2answers
49 views

How to automatically send email when process is using more than xxxMbit/s

I haven't found anything for that. How could I automatically send an email (via crontab) with the ID of the process, the user & finally what's the name of the process for example when this process ...
0
votes
1answer
114 views

Windows Scheduled tasks ends prematurely, so server doesn't run

I'm trying to run Django on my Windows Server 2008 machine. I can do this manually by calling python manage.py runserver 54321, which launches Django's server at http://127.0.0.1:54321 -- then I can ...
1
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1answer
277 views

Root cron job can't read file from /root/

I've got a cron job in root's crontab defined like this: 0 1 * * * /usr/local/bin/tarsnap-backup-script > /tmp/tarsnapcron.txt 2> /tmp/tarsnapcron.err The script is a python script that ...
0
votes
1answer
758 views

Why is cron running twice?

I wanted to execute my PHP mailing-script automatically with cron. I always get the mail twice though. The script runs fine when started manually. I put this in the crontab for testing: 54 13 * * * ...
1
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1answer
222 views

Is it possible to make an individual daily cron run with UTC time while keeping the system localtime?

I have a cron script under /etc/cron.d as so: SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin 0 0 * * * root /usr/local/sbin/app_logrotate >> ...
0
votes
1answer
955 views

Compress and remove logs from jboss on linux with cron

I need to compress and remove log files after some time from serwer. I have never write scripts before. So far i have script logs.sh: #!/bin/bash LOGS=/usr/local/jboss/server/default/log/ ...
3
votes
1answer
350 views

Wheezy processes die periodically

I have a very weird problem. Certain processes on my mail server, but not all, die periodically (every second month or so). A few of the process that die are: ssh dovecot postfix Processes that ...
2
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2answers
526 views

Exim - Force Messages to domain before retry time

We have exim running in queue-only fashion. The reason is that we are a bulk sender (a legitimate, double opt-in) and have experienced Yahoo and Hotmail throttling. The best practices state that once ...
1
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0answers
51 views

Won't keychain --clear in .bash_profile interfere with cron jobs?

Keychain tutorials recommend adding /usr/bin/keychain --clear to ~/.bash_profile to only allow cron jobs to use passwordless login. I'm not sure I understand how this works. If I take it right, the ...
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votes
2answers
35 views

Crons excluding specifc time ranges [duplicate]

I have many crons that run at different intervals. I need to configure them all to not run between two specific time ranges. How can I configure a unix cron to run exclusive of 11:45-13:00 and ...
1
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2answers
1k views

Linux Bash IF conditions not processing when running as crontab

So I've made myself a little script which monitors my served directories for any PHP files which have changed. It's designed to run every 5 mins from crontab and email me any changes so that I can ...
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votes
1answer
121 views

Crontab not executing [duplicate]

I'm running CentOS 6.2, trying to run tasks through cron. I've verified crond is running $ service crond status crond (pid 20553) is running... I have no /etc/cron.allow file, but I do have an ...
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1answer
229 views

Cron not running script [duplicate]

I have a script that works when called: /usr/local/bin/myscript #this works fine Permissions for the file are: -rwxr-xr-x 1 root root 155 Jan 27 09:34 myscript I've added a line to /etc/crontab: ...
0
votes
1answer
346 views

Change cron.daily run time on ubuntu

Am I correct in understanding that to update the time that a daily cron job runs (from /etc/cron.daily/), all I need to do is update the /etc/crontab file? Are there any risks I should be aware of ...
0
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2answers
960 views

Why unison does not run in cronjob?

I want two way data sync between two CentOS based servers, so I installed Unison on both of my CentOS servers. I made a script file on root which runs unison and works fine, and syncs the files, when ...
0
votes
2answers
103 views

Cronjob screen PHP does not executed [duplicate]

If I execute the following in the terminal it works: screen -dmS tt-rss-daemon sudo -u www-data /usr/bin/php /usr/share/nginx/www/tt-rss/update.php --feeds --daemon If I write the following in a ...
0
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3answers
2k views

Cron task error: WRONG FILE OWNER

I'm using the /etc/cron.d/ folder to store my cron tasks. These tasks are symlinks to my actual file which is kept under VCS. These files are owner by a user named "www-data". I've read that Cron will ...
1
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1answer
299 views

Issues with MySQL restart on running through a crontab scheduler

I have written a shell script which starts MySQL when its killed/terminated. I am running this shell script using a crontab. My cron looks for the script file named mysql.sh under /root/mysql.sh ...
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0answers
32 views

crontab not outputting to log when cronlocks removed on some files

I'm running a variety of crontab curl requests and I'm not sure why SOME of them stopped outputting the contents to log files. The only change I made was removing cronlocks from all of the entries ...
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votes
1answer
568 views

VPS debian 64 bits put cron to reboot at 7:00 every day

I have a VPS with debian 64bit. And I would like to set a daily reboot at 7:00 with $ ps aux root 1844 0.0 0.1 18832 964 ? Ss 07:23 0:00 /usr/sbin/cron so the cron it's ...
0
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2answers
193 views

how to prevent crontab logs from registring in syslog?

I have separate my crontab log into cron.log file by uncommenting the below ling in /etc/syslog.conf, But it register in syslog too. cron.* /var/log/cron.log How ...
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votes
1answer
469 views

Crontab is Not Running Crons [duplicate]

I have crontab setup on my CentOS VPS and it is not running... Here's the cron file: * * * * * php -f /var/zpanel/hostdata/zadmin/public_html/pingrglobe_com/crons/1min.php * * * * * php -f ...
2
votes
1answer
95 views

CRON job running but no sign of it in any file

This is an odd one and I know that the answer will be something simple that I have over looked... I have inherited responsibility for a Linux server running an old version of Ubuntu 10.04, it has a ...
1
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1answer
85 views

Script won't do what it should when run with cron

I've got some problem. I have script execution scheduled but when time comes nothing happens. #!/bin/sh TIME=`date +"%d-%m-%Y"` cd /var/www/flyer/data/www/ mysqldump -u root -ppasswd --databases ...
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votes
3answers
661 views

Mysterious automated emails

I remember messing around with crontab and setting up email capabilities on a server many months back, and now all of a sudden I'm getting the following email: EMAIL HEADER: from: root ...
1
vote
1answer
370 views

One-line backup, compress, scp database file

I support a company with a remotely hosted web site. They use PostgreSQL dbs. I can't write scripts on the remote server, and I don't want to store any backup files on the remote server, but I can ...
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votes
1answer
213 views

Restart crontab @reboot rule without actual reboot

I'm using crontab with a @reboot entry which starts a script containing a endless while-loop that is processing the output of a tail -F command. Is there any way to stop the currently running script ...
0
votes
1answer
476 views

Proxmox cron.daily log error

I am having a problem with cron.daily job in Proxmox. Its giving me this error: /etc/cron.daily/pve: Can't stat /var/log/pve/tasks/6: No such file or directory at /etc/cron.daily/pve line 78 The ...
1
vote
2answers
427 views

How does Cron interact with Kerberos for authentication?

I have a CentOS 6.4 machine which is set up with pam_ldap and pam_krb5. It is configured to use our Active Directory servers for authentication. I can SSH into the machine using AD accounts. I have ...
0
votes
1answer
94 views

How can I control a gradual file upload with cron or similar? [closed]

I have several terabytes of data I need to back up to S3/Glacier over a slow link. I want to upload from, say 9pm to 9am and resume from where it left off. Is there free software that would do that ...
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votes
1answer
95 views

Configuring / Securing credentials required by batch job

I have a batch job which should run as cron job on a Linux server. This job requires some credentials to do it's work. Idealy I don't want to have that kind of credentials stored on my server, but ...
0
votes
1answer
95 views

cron to anacron migration process

I have a script that I want to run nightly on my lab's RHEL 5 and 6 workstations, so I'm deploying the script to each system's /etc/cron.daily/ directory and making it executable there. But some ...
0
votes
1answer
77 views

Why is cron using a different Ruby than my user and how to fix it?

I have a cron job that is a Ruby script. The problem is that the ruby executable is different than expected. Ruby was installed from source so it should be the new global default. $ ssh ...
0
votes
1answer
777 views

Cron won't use msmtp to send emails in case of failed cronjob

I'm trying to configure a machine so that it will send me an email if one of the cronjobs output something in case of an error. I'm using Debian Wheezy. Cron is working normally (without the email ...
2
votes
1answer
174 views

Why is cron mailing me program output even though I've redirected to /dev/null?

I'm trying to restart a system process through cron and getting emailed the startup output of the process. I thought redirecting STDOUT and SDTERR to /dev/null would "silence" the output but alas, ...
0
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0answers
45 views

need at jobs identified by name (advanced atd daemon)

Sometimes I'd like to delete or overwrite (or simply cat) an at job. Unfortunately, the at jobs are identified by a sequential number (file in /var/spool/cron/atjobs), which makes those operations ...