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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85 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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70 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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30 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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50 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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302 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
98 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 ...
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1answer
790 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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118 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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158 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
113 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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82 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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71 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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29 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
57 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
409 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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38 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
220 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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116 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
113 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
306 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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74 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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85 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
60 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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63 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 ...
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1answer
194 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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94 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
31 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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88 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 ...
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1answer
152 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
318 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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23 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
971 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
2k 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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75 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
36 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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46 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
266 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. ...
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1answer
85 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
109 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
72 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
49 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) ...
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2answers
166 views

Crontab unable to open google chrome

I have written a chrome extension that performs a task whenever it is available, and for that I would need the chrome browser open at all times. My idea was to have a check say every minute if the ...
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0answers
166 views

Scheduled Cron Back up from EC2 to S3

I have created a script for scheduling sql back ups and store in Amazon S3. Below is the script that I used for taking backups. DATABASES="testdb" testdb_USER=root testdb_PW=root ...
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1answer
46 views

CronJob not working as expected

I generated a cronjob line for crontab -e with Crontab Generator: * */2 * * * curl http://www.example.com/cron.php >/dev/null 2>&1 I was expecting that it should run every 2 hours. But in ...
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1answer
78 views

Cron process sends email, where are these sent emails?

Ubuntu 14.04 I have an email process that sends an email via cron, using sendemail (which I believe is a Perl program that doesn't need an MTA). Where are these sent-emails stored? If they are stored ...
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105 views

crontab and running nmcli in a script

I am trying to come up with some way of making a persistent VPN connection, so if it drops (as it does from time to time) the connection will be remade. I though using crontab would be the best way to ...
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1answer
133 views

Launch a .desktop file from boot

I have a .desktop file on my desktop that launches a html page. I need the .desktop file to run from startup, what would be the best way to do this? I have tried crontab and also the startup ...
0
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1answer
80 views

Cron emails no longer going to local 'chuck' account

Ubuntu 14.04 installed as a VM on a machine that sends emails, with attachments, via Perl 5.18.2. That part works because Perl talks directly to the SMTP server. Let's call the machine name ...
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28 views

Reading Cronjob Output [duplicate]

I have a task setup to run on my cronjob where I need to read the output. What I need from the output is the starting character (let's say A) and the ending character (let's say Z). A helps me ...
3
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2answers
246 views

Performance loss after 30 minutes

This one's baffled me. I have Ubuntu 14.04, 3 days ago (2014-20-10) it started slowing down. I've reproduced it by opening gedit and then closing gedit, when the issue is active it hits roughly 2 ...