Cron is used to execute scheduled commands. It acts as a task scheduler on Linux and UNIX systems which will execute commands at specified times set by the user. Cron has a great deal of customization and is often used on server environments where common tasks are run on a regular basis.

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How to use .profile alias in crontab

I've read the answers to this question, but still don't understand what to do: http://serverfault.com/questions/119273/how-to-use-my-aliases-in-my-crontab I am logged onto my Ubuntu server as root. ...
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7answers
566 views

How to see if no output from `ls *.xls` command?

Ubuntu 14.04.1. I have a bash script, called by cron every 10 minutes, which basically looks for files in a subdir, then loops through and process each file. But how do I check if there are no files ...
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52 views

how to use crontab to execute i2cset commands

I am trying to execute a bash script that displays the IP address on a lcd display , on startup .. I want it to execute so that the user knows the ip address as soon as the user starts the linux ...
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29 views

CRON job not running after entering it using crontab -e

I added the following to my crontab using the following: crontab -e and then adding the following line: 37 1-23/2 * * 1-5 php /home/code/auto_processor.php >/dev/null 2>&1 The script ...
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1answer
34 views

execute the enscript command in cron job fails

When executing my backup bash script, all goes fine including executing two lines of enscript (enscript converts a log file to .html and.pdf format in my case). Problem is running the same script ...
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37 views

Crontab sending mails only to gmail

I set MAILTO option in cron-tab to receive emails about the output of program it runs. When i tried with my personal g-mail account (myname@gmail.com) and other g-mail accounts it worked. But when i ...
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1answer
48 views

Network scanning script - cronification issues

This is (yet) another query about cron. I have referred to the guide on this site before posting here, but I still can't get this script to work. It is designed to suspend the PC when activity on ...
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1answer
17 views

Running a non-standard cron job

OS: Ubuntu 14.04 I would like to run a PHP script /home/app/myapp.php at minute 37 every two hours between 5AM and 7PM GMT Monday through Friday year round. What is the crontab file syntax for that? ...
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9 views

Command to sleep (put into low power state) and scheduled task to wake back up [duplicate]

I can use sudo pm-hibernate to put my laptop into a low power state, but I have to press the power button to turn it back on. Is there a way I can put it into a low power state that can then be turned ...
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1answer
39 views

How to automaticly open a URL at specific times each day

I am using kubuntu 14.04. I have installed cron using sudo apt-get install cron, and then I created this file in IDLE, called openurl.py. #!/usr/bin/env python import webbrowser ...
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1answer
46 views

crontab sometimes doesnt work

I am trying to execute a script via crontab but some scripts work, while other do not. Why does this happen? username@here> crontab -l 00 13 * * * csh -c /home/apps/bin/jobnumberone.pl 00 18 * * * ...
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21 views

@reboot in crontab could increase the startup time?

I have a script that updates my ip address in the DNS server. Sometimes this script takes 3 or 4 secs to run. I want to know if the script execution time could increase the total startup time of my ...
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0answers
36 views

Need help fixing my cron job

I just recently installed Tiny Tiny RSS. I followed the instructions from here to set up the cron job. I did this to add my cron job: sudo crontab -e This edited the /tmp/crontab.PkFSFo/crontab ...
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1answer
179 views

Autostart a Python script in an LX terminal

I have a python script which extracts continuous data from an incoming serial string and inserts the fields into an Sql database. The python script can be run manually from an LX terminal and works ...
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3answers
71 views

Copy sub-directory from 1 directory to another

I need to make a copy of the content of one directory to another. I need to copy only 1 sub-folder. For example; if I have a folder called "from" and want to copy one of it's sub-folders (with all ...
6
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1answer
416 views

Schedule to record video stream in VLC

I work at a school and have setup a workstation to broadcast/stream the morning announcements for the teachers and kiddos. Teachers in the classroom access this stream via Windows Media Player or ...
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0answers
71 views

Configure when unattended-upgrades should reboot

I've set up unattended-upgrades and configured it to reboot at 3:00. Upgrades itself are installed after 4:10 so I have about one day before an upgrade will cause a reboot. Last install was this ...
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0answers
94 views

tracking down possible file system corruption issue with f2fs

I am investigating a potential file system corruption issue running f2fs on an ARM 7 device with an Linux 3.12/ Ubuntu 14.04 stack on top. So, the symptoms of the issues are as follows: The ubuntu ...
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2answers
66 views

Best way to schedule script, crontab or other options?

I never use crontab, and while it ask me for root password, I am careful. So my question is, I have to run periodically (let's say every 30 min)a simple script for analyze the text file, which is ...
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0answers
54 views

How to run a Shell script using Crontab [closed]

I set a cron job as a root user: * * * * * /usr/bin/sh /home/abc/Desktop/AbcFolder/pqr.sh Also, I made sure to change the rights of the file pqr.sh to CHMOD 777 Below is my pqr.sh shell script ...
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0answers
45 views

I have lost the visual Cron manager from webmin

I don't know if this was an effect of the shellshock attack which my server was victim to (or another attack that worked) but it basically enabled the hacker to overwrite my SSH config file when the ...
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0answers
24 views

cron job to run google-musicmanager and have its indicator showing up in the menu bar

For some reasons, I need to periodically run a script with cron in order to start Google Music Manager (and to perform some music folders/files and config management stuff, which poses no problem). ...
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1answer
44 views

Scheduling shutdown in layman's terms

I'm trying to schedule a shutdown for 10:30pm (22:30) each evening. I am fairly new to Ubuntu. In Windows 7, this was an extremely easy task. Apparently in Ubuntu this is a rather complicated task. ...
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3answers
115 views

Automatic shutdown at specified times?

I'm aware I can use (sudo?) shutdown -h hh:mm in a terminal window to shut down a system, however the user that is logged in is a kiosk user, which is locked down in such a way that terminal (or any ...
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0answers
32 views

User specific cronjob

I need a user specific cronjob on my ubunt 14.04 server. But if I enter crontab -e as the user, vi opens and I can see /tmp/crontab.Lb3Khc/crontab" [Permission Denied] I have already created a ...
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1answer
118 views

cron runs at wrong time

I have a /etc/crontab file. It's pretty much the default one except for the daily tasks: '# m h dom mon dow user command 17 * * * * root cd / && run-parts --report /etc/cron.hourly ...
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0answers
57 views

incron tab won't fire

I'm trying to get incrontab running, but it won't work. This is the error I get: access denied on ~/propt/apo/feeds - events will be discarded silently and this is the line in incrontab I want to ...
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1answer
86 views

How to end a cron started script?

I start a script via cron which works fine. But when i then try to end that script via cron (either killall / pkill / pgrep does work) nothing happens. If i let cron try to kill it or try it my own ...
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1answer
167 views

How to stop cron from sending email when there is nothing in STDOUT or STDERR?

Ubuntu 14.04lts with Perl 5.18.2. This is a special case where Google did not help me. I do not want to turn off email for all cron jobs, I have about 15 jobs in my crontab. I need to see the ...
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56 views

How to configure cron

I´m very confused trying configuring cron. I have a file named "crontab" in "/etc/crontab" which I edited to show (I want a daily task at 2:00 AM) As it claims is the "system wide crontab" # ...
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49 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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2answers
37 views

Cron : How to delete directory via cron

I have allready installed cron and here it is 1 0 * * * rm -R /path/to/my/folder/$(date +'%Y-%m-%d' -d "yesterday") I want to delete every day folder with "Yesterday name" LIKE "2014-12-14" ...
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0answers
52 views

Crontab wont run this script!

I am trying to run this script as a cron job to enable a weekly back up of my mediawiki site. Running on Ubuntu server 14.04. It simply will not run. The scipt is running from the root folder of the ...
1
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1answer
71 views

reprepro - Is there any chance to enter the passphrase via bash-script?

I use "reprepro" for getting the latest Debian packages out of my local repository, which works fine manually. Now I need to automate this process through a cron job but the reprepro passphrase is a ...
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0answers
57 views

munin send mail about permission denied to munin-update.log

I have install munin, but CRON send me mail about an error: Can't open /var/log/munin/munin-update.log (Permission denied) at /usr/share/perl5/Log/Log4perl/Appender/File.pm line 103. but the ...
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1answer
30 views

crontab not running simple job

i have a very simple command in cron that should reboot my system everyday. I modified crontab in root with the following: sudo crontab -e I then added one line to the end of the crontab: 0 1 * * ...
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0answers
66 views

Backup database with mysqldump

Hello i use mysqldump with crontab for save my database each hour but after one day i have 24 files What is solution for auto delete if more 5 files ? And what is chmod for folder backup for security ...
0
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1answer
116 views

Shellscript creating directories in wrong direcroy when running from crontab

I have written the following code which will create directories with name format "nowt_hour_minute_second". In that directory another text file will be created with the directory creation time. Now I ...
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1answer
134 views

Launch url to start a script like a cronjob?

I have a website on mutualised hosting (server A). I need to run every minutes a script, I just need to go to http//www.mysiteserverA.com/run.php I searsch a solution automaticly run this script every ...
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0answers
17 views

rsync never terminates and makes Tb size snapshot directories

I have a cron job that runs rsync every day to download data from a server. It was working fine until the space allocated for me in the server was changed (probably increased). It happened as I was a ...
0
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1answer
357 views

What schedules logrotate?

I'm working on the program which creates a big log file. I want to handle it with logrotate. This is a configuration I put to /etc/logrotate.d/: /var/log/myproject.log { hourly maxsize 1 rotate ...
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3answers
828 views

Root crontab not running

For some reason, my root cron tab does not seem to be running. Trying to reboot device every night at midnight. Should be the following as root: crontab -e Then add: 0 0 * * * /sbin/shutdown -r ...
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0answers
42 views

Run cron job to execute a script when a particular file is updated

I would like to automate a process which requires running a script to generate some files. To do this I thought that adding a cron job to run this script would be great. But I want cron to run the ...
0
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1answer
28 views

Custom cron job filename for a package

I'm willing to create a cron job for a package but when I define it in debian/cron.d it gets installed as /etc/cron.d/package. I'd prefer to be able to change the name of the cron job to be something ...
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0answers
33 views

Many CRONs processes

My system from couple days have some strange issues. Main thing is that I can't ssh for most of my day. I noticed that is connected with amount of CRON porcesses. In crontab I have about 90 records ...
2
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1answer
113 views

This anacron cron job is sending emails to me - how can I redirect the output to null? [duplicate]

$ cat update-notifier-common #!/bin/sh set -e [ -x /usr/lib/update-notifier/package-data-downloader ] || exit 0 # Try to rerun any package data downloads that failed at package install time. ...
0
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1answer
53 views

How to implement in upstart that a service is preventive restarted every x hours?

I have a component --- started with upstart --- with a bug. The bug causes the application to freeze and unfortunately, it does not crush. As a temporary walk-around, I want to force the service to ...
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0answers
77 views

pmcmd not working with Ubuntu crontab or gnome-schedule

I have scheduled a shellscript which interns calls an informatica workflow with PMCMD command. when the script executed manually, it is starting the workflow properly but when the workflow is ...
0
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1answer
56 views

run a script and return system to suspended or running mode

Somehow I cannot find how to do this common task. I want to run a (backup) script daily at certain time regardless whether the system is running or suspended and return to the previous state ...
0
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1answer
36 views

Why am I getting this annoying log messages.CRON[17405]: (root) CMD every minute

I have configured rsyslog.conf file to store log messages to mysql but I am getting some annoying log message in my MySql table. which looks like this. Nov 3 14:48:01 username CRON[17405]: (root) ...