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.

learn more… | top users | synonyms (2)

3
votes
0answers
334 views

unattended-upgrades error: “/etc/cron.daily/apt: DB Update failed, database locked”

Ubuntu 14.04.1 LTS Since installing unattended-upgrades, the following error message is received daily: From root@xxxxx Thu Aug 28 06:36:06 2014 X-Original-To: root From: root@xxxxx (Cron Daemon) ...
2
votes
0answers
61 views

Running Chrome extension periodically using a cronjob

I have built a chrome extension that performs a set of actions on a random webpage. The extension seems to work fine and I plan to run it on a VPS running Ubuntu with a XFCE desktop environment. Now ...
2
votes
0answers
125 views

Tiger: `rtm` is listening on socket XXXX

On my Ubuntu serve 12.04 LTS, Tiger is reporting a lot of stuffs like this: OLD: --WARN-- [lin002i] The process `rtm' is listening on socket 60404 (UDP) on every interface. NEW: --WARN-- [lin002i] ...
2
votes
0answers
64 views

Can I set up a cron job on Ubuntu Phone

I've been looking around, and can't find if Ubuntu Touch can run cron. So my question is: Can it? Also does it have a standard set of bash utils installed?
2
votes
0answers
139 views

Need to setup email notification when system starts and shutdown

I would like to have the system send me a email notification everrytime the system starts or shuts down. I am currently running Ubuntu 12.10 I found this tutorial but I couldn't make it to work.
2
votes
0answers
684 views

Why doesn't duply work when set as a cron job?

I have a problem with a cron job which starts but doesn't complete. Running the command manually works fine. I already read the page about cron issues and solutions here on AskUbuntu, tried the ...
1
vote
0answers
25 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 ...
1
vote
0answers
146 views

Crontab not executing script with cURL

I have a cron that's set to run every ten minutes that works fine if I execute the file manually by entering php register.php But, my cron will not execute this file once it includes anything cURL ...
1
vote
0answers
68 views

Cron, xconf-query and Xubuntu 14.04

I have updated my Xubuntu to the 14.04 version. Unfortunately, I am experiencing a problem. I have a script, named earth, updating the wallpaper of my desktop. Here is the code #!/bin/sh nice -n 19 ...
1
vote
0answers
132 views

Which tasks in “Scheduled Tasks” (gnome-schedule) use anacron versus cron?

I am trying to run a command once a day, but my machine is not always on. anacron says it's meant for such purposes, but I prefer to use the Gnome Scheduled Tasks GUI program. If I schedule a task to ...
1
vote
0answers
56 views

syslog time is not matching cron string setup

I am running many cronjobs in my server. When I was checking the syslog file to see the cron timing, it's completely not matching. Can someone help me to understand. syslog May 23 00:00:01 xxxxxx ...
1
vote
0answers
222 views

Allow user to run programs as root without password. Would it be the correct solution to my problem?

I have a server which I need to be running certain programs permanently; I'm having problems with two of them and I'm not sure if the solution I've found would be the correct one, so I ask for opinion ...
1
vote
0answers
25 views

Any reason why Ubuntu's man page on crontab(5) is less informative?

Why is the man page for crontab(5) at manpages.ubuntu.com less informative than corresponding man page at linux.die.net? Compare The "sixth" field (the rest of the line) specifies the command to ...
1
vote
0answers
323 views

Cronjob for MySQL Backup Bash Script Not Running

I am trying to backup many MySQL Databases on a daily basis into a Single ZIP. The bash script works fine by itself (ran in normal environment), but when the Cronjob takes over it does not run. Infact ...
1
vote
0answers
54 views

Make CronTab not asking for id_rsa keyword when running in terminal

I like to do some git pull inside a script and see see output of it. So I made up this cronjob to test: DISPLAY=:0 * * * * * mike /usr/bin/gnome-terminal -x zsh -c "/var/www/up.sh; zsh" ...
1
vote
0answers
137 views

Configuring logrotate without root access (per user log rotation)

How best can logrotate be configured, on a per-user basis, to rotate files in the home directory of the user, under control of a per-user 'crontab -e'?
1
vote
0answers
85 views

Using a NAS as a collective dump, with symlinks for whoever uploaded each file

I have a local machine that was sitting around & doing very little, so I decided to turn it into a NAS (Network Attached Storage) machine, with a 40GB disk for Ubuntu (13.10), a 160GB disk that's ...
1
vote
0answers
141 views

Why won't cron run my sh script?

Used gnome-schedule to create a script to set my headset as the fallback audio device because it keeps unsetting it when the headset gets disconnected or pc goes into sleep mode. Anyway, crontab is ...
1
vote
0answers
617 views

Ubuntu 12.04: Crontab stopped running/Curl and cron blocking?

I have created a number of PHP daemons in the past and my general procedure is this: Run a cron job every minute to start up a new instance of the daemon Create a log file Check to see if enough ...
1
vote
0answers
38 views

crontab command in the 2nd line doesn't run

I have these 2 lines in cron tab. The 1st command executes but the 2nd one doesn't. It just doesn't run. No traces in log. I have a new line (enter) at the end. I have restarted the cron service ...
1
vote
0answers
73 views

Backup regimen - is this plan any good?

I have a desktop that has some valuable personal and financial records, photos, etc. I installed a second drive formatted ext3 called 'internalbackup'. I've been using a variety of backup programs, ...
1
vote
0answers
71 views

Why are alerts still coming if a job is commented out in cron?

In cron entry I have disabled the ignite recovery tape backup. But still we are getting alerts as: The action /opt/osit/omniback/bin/check_make_recovery.pl failed Crontab entry : # Ignite ...
1
vote
0answers
189 views

How to trigger anacron start if USB drive connected

There is a script in /usr/lib/pm-utils/power.d/anacron which restarts anacron if leptops are connected to power. Is it possible to have a similar script restart anacron if (a certain) USB-drive is ...
0
votes
0answers
17 views

nfdump schedule with cron

Hi I tried to generate nfdump file with crontab, but whatever the reason it dosent work my script #!/bin/bash nfdump -mR /home/user/test -zw /data/fnf1.dump this script itself works and all other ...
0
votes
0answers
26 views

Running cron scripts with php and node

I've gone through many posts for cron jobs, but still was unable to run it on my Ubuntu 14.04 environment. I have a file test.sh in /tmp/test/. The test.sh contains several other scripts in PHP and ...
0
votes
0answers
21 views

Running apt-get upgrade in crontab

Adding sudo apt-get upgrade -y into crontab as a daily. This seems like a very good idea to make sure everything is automatically kept updated, but nobodys ever mentioned it before (and recommend ...
0
votes
0answers
23 views

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. ...
0
votes
0answers
26 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 ...
0
votes
0answers
20 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 ...
0
votes
0answers
27 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 ...
0
votes
0answers
18 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 ...
0
votes
0answers
21 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 ...
0
votes
0answers
48 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 ...
0
votes
0answers
68 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 ...
0
votes
0answers
32 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 ...
0
votes
0answers
16 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). ...
0
votes
0answers
28 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 ...
0
votes
0answers
46 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" # ...
0
votes
0answers
26 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 ...
0
votes
0answers
44 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 ...
0
votes
0answers
31 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 ...
0
votes
0answers
38 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 ...
0
votes
0answers
40 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
votes
0answers
15 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
votes
0answers
36 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
votes
0answers
24 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 ...
0
votes
0answers
50 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
votes
0answers
87 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 ...
0
votes
0answers
69 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 ...
0
votes
0answers
35 views

Auto Update Even When Laptop Lid Is Closed

I am trying to follow this guide for auto updating Ubuntu. I am using the Advanced Aptitude option. My problem is that I am trying to do it on a laptop and cron doesn't work when the lid is shut. I ...