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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81 views
Crontab not running a script
I have set my crontab to run 2 script.
the first script is not running.
I set up on the crontab -e not sudo crontab -e
The error i have is this
...
0
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1answer
39 views
cron job not executing youtube-dl command
I want to use the "youtube-dl" command in a cron job to download videos fron youtube. Therefore I created the following cron job:
26 00 * * * /usr/local/bin/youtube-dl -o ...
1
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0answers
34 views
All commands in my crontab fail with “Permission denied”
crontab -e and crontab -l work just fine:
$ crontab -l | grep -v '^#'
* * * * * /usr/bin/env
* * * * * echo 'Hello from crontab'
However, I see two messages like this every minute in ...
3
votes
1answer
43 views
Rsync behavior in a cron script
I have an nfs device that creates checkpoint (backups) everyday. I want to use Rsync to copy these checkpoints to another device (Drobo connected via iSCSI). So I've run the script on a single nfs ...
0
votes
3answers
41 views
How to open a crontab file in c++
I am working on a QT application which makes the usage of crontab easier with GUI. But I am facing the trouble of including the jobs in the crontab file from my application .
So how do i open a ...
59
votes
3answers
79k views
Where is the cron / crontab log?
I want to verify if my cron job is executing and what time. I believe there is a log for my sudo crontab -e jobs, but where?
I searched google and it I found references to look in /var/log ...
1
vote
1answer
39 views
Startup script doesn't execute at startup
I have followed the tutorial here that shows how to setup the No-ip update program to start at system startup.
I have done exactly as specified here, yet the program still doesn't start. Also, when I ...
0
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0answers
63 views
Boot randomly fails after upgrading to 13.04
A few days ago I upgraded Ubuntu from 12.04 LTS to 12.10 and then 12.10 to 13.04. After doing that, all things work perfectly, but sometimes the boot process hangs. It doesn't happen every time I ...
1
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1answer
69 views
crontab does not run
i have added a script to run every min
like this
crontab -e
and then add this code
* * * * * /bin/sh /home/user/Public/call.sh
the code did not run
then i restarted the cron
sudo ...
1
vote
1answer
56 views
running deja-dup as cronjob, BU disc not connected
I have a problem with my backup cronjob. I use these settings (as proposed in that post):
15 * * * * env DISPLAY=:0 /usr/bin/deja-dup --backup
During runtime deja-dup says:
Backup location not ...
2
votes
1answer
60 views
Run two commands sequentially uisng crontab
My 3-year girl loves SuperTux. she couldn't control the mouse! so the game should run automatically on startup and after the game, computer should shut down automatically, too.
however I put the ...
0
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0answers
17 views
Can't get MAILFROM to work in crontab on Ubuntu server 12.04
Is MAILFROM supported in crontab in Ubuntu server 12.04? Cron job errors are sent via exim ok, but the sender, root@localhost, is not acceptable. MAILFROM in crontab works fine on my Fedora Core 15 ...
7
votes
2answers
7k views
(CRON) info (No MTA installed, discarding output)
I have a fresh install of Ubuntu 12.04.1 LTS an a number of servers.
I have not added any cron jobs or edited my crontab on those servers, however, at around the same time for each machine, I get a ...
0
votes
3answers
551 views
How do I configure exim4 to send mail through a password protected ssl smtp mail server?
I'd like my cronjobs to be able to send mail from my home computer. My servers configure exim4 like this:
dc_eximconfig_configtype='internet'
dc_other_hostnames=''
dc_local_interfaces='127.0.0.1'
...
-1
votes
4answers
156 views
Cron job to restart Apache
Ubuntu Server 12.04. I use:
sudo crontab -e
* * * * * root /etc/init.d/apache2 restart > /dev/null 2>&1
sudo restart cron
And it doesnt work. How to fix it? So many docs in google,I need ...
3
votes
3answers
3k views
Cron jobs show up in GNOME Scheduler but don't execute
I have configured Back In Time and MySQL Administrator to make a backup every day at 15:00. In order to be sure I have installed Gnome Scheduler to see whether these two applications are registered ...
0
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0answers
22 views
Cron ran but early
I have a cronjob to run at 3.15 to backup database but the file was saved at 2.15?
here is the line in /etc/crontab
15 3 * * * root bash /home/user/backup.sh
And the bash file
#!/bin/sh
...
3
votes
2answers
367 views
Where can I find a PPA for fcron?
According to https://launchpad.net/ubuntu/oneiric/+package/fcron it seems that there is a version of fcron available for 11.10, but reffering to http://www.ubuntuupdates.org/packages/show/329892 it ...
11
votes
2answers
8k views
At what time does cron execute daily scripts?
If I place a shell script in /etc/cron.daily/, at what time of the day will it be executed?
0
votes
1answer
70 views
Thousands of pam_unix log entries in logwatch
My logwatch reports, within the CRON section, contain thousands of entries like those below. How can I either reduce the number of log entries OR have logwatch ignore them?
Jan 30 18:49:01 ota3 ...
2
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1answer
39 views
Shell script runs fine by itself, but not in cron
I have a shell script that runs nmap on an address, and I want to have it do it daily for me. So I added a reference to it in my crontab.
Unfortunately, for some reason it doesn't recognize the ...
0
votes
0answers
16 views
How to mark notifications about failed jobs sent by CRON
In previous CRON versions when cronjobs failed to run you would get an e-mail in /var/mail/user. This e-mail would contain a line like this:
Subject: Cron script.py # JOB_ID_2 (failed)
But CRON ...
5
votes
2answers
13k views
Script doesn't run via crontab but works fine standalone
I have a script that reminds me to restart my computer if uptime is more than, say 3 days (although its set to 0 days now just to check if the script is running as my computer has been up only over a ...
1
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3answers
2k views
TIme of execution of daily anacron job
I have set a daily anacron job, which runs form /etc/cron.daily. From the /etc/crontab I see it should run daily at 06:25 (or at start-up/reboot).
However when the date changes (00:00) and the ...
2
votes
3answers
165 views
Where is the user crontab stored?
Since upgrading my user's crontab has been wiped out. This is not the first time this has happened this year and it's a pain restoring it each time.
I'd like to be able to back up the crontab for my ...
4
votes
3answers
224 views
Do I have to set up mail for Ubuntu to be able to mail users?
I remember Debian automatically sending mail to users (to report a failed sudo authentication attempt, for example). On Ubuntu is mail of some kind automatically set up? I created a cron job, and ...
1
vote
1answer
26 views
Kill a cron job from cron
I want to start the ubuntu update at night because internet is free at that time. and then kill the process in order to ensure that it does not download anything after 7:00 AM.
Is there any way to ...
3
votes
1answer
33 views
How to run a cron entry periodically?
I have a line of script that works through terminal and works through cron to run one time: it downloads a file from the internet and saves it in a specific place named as the date it was found:
cd ...
6
votes
3answers
859 views
Generic solution to prevent a long cron job from running in parallel?
I am looking for a simple and generic solution that would allow you to execute any script or application in crontab and prevent it from running twice.
The solution should be independent on the ...
1
vote
2answers
224 views
unattended-upgrades not running, /etc/cron.daily/apt missing
I have automatic-upgrades installed and configured, but it never seems to run, because there are always security updates waiting to be installed when I check.
...
0
votes
1answer
176 views
How to stop cron from mailing me?
I have setup a ssmtp server with my gmail username and password.
After that i have been getting constant emails from my laptop to my gmail.
Here the mails.
The first one is somewhat like this:
The ...
2
votes
1answer
56 views
Script that opens webpage and records it as cron job
I need and have to create a script that takes webpage address and time in seconds as arguments. It records whatever is shown on the webpage - i.e. JavaScript and HTML content (Flash not required). ...
2
votes
1answer
39 views
How can I create popup windows?
I have a small script run by cronjobs to synchronize a git repository every 2 hours. The git will be pushed to the server with a constant message. How can I have a popup windows which ask the message ...
8
votes
4answers
8k views
How do you set the timezone for crontab?
I have set up ACPI wakeup so my laptop wakes up at a certain time each morning. The timezone for this is UTC. I want to set up my crontabs also using UTC so they fit with the wakeup alarm.
How do ...
1
vote
1answer
47 views
Running two commands in crontab
I have this line in my crontab file
*/1 * * * * espeak 'foo' && espeak 'bar'
But only half of it, first command gets executed every minute.
While when I write this in the terminal it works ...
2
votes
3answers
171 views
How can I use Cron to run shells scripts at a fixed time?
I am wanting to learn cron and I searched for some quality tutorials. I found How do I set up a cron job.
My goal is to have a folder on a network that will have sub-folders. Each sub-folder is a ...
0
votes
2answers
538 views
Wget Scheme Missing
When I run Wget from terminal with command
wget targetfile.php
I got error "Scheme Missing". What does it is suppose to mean and how to fix it? I googled but all links I found is speaking of drupal ...
-1
votes
1answer
111 views
Cron not working
Wrote a short shell script "wallch.sh" to randomly change my desktop background:
DIR="/home/user/Wallpapers"
PIC=$(ls $DIR/*.jpg | shuf -n1)
FIL="file://"
gsettings set org.gnome.desktop.background ...
2
votes
2answers
61 views
create backup from directory
I would like to create backup from directory using cron. I wrote following command:
cd path && sudo zip -r "backup-$(date +"%Y-%m-%d").zip" git/ && sudo mv "backup-$(date +"%Y-%m-%d").zip" /backup/
...
4
votes
2answers
368 views
Ubuntu 12.04 isn't working with one of my crontab commands… any ideas?
In my crontab file (sudo crontab -e) I have the following commands:
*/1 * * * * wget -q -O /dev/null http://help.mysite.com/inc/mail/hesk_pop3.php
0 7 * * * bash -c "/home/backup/backupscript.sh"
...
3
votes
2answers
36 views
Is it possible to list the actual commands that have been scheduled with `at`?
I'd like to be able to see exactly what has been scheduled with at. atq will list the job id, time to run, and user to run as, but not the actual task that will be run.
Thanks!
Edit I should add ...
0
votes
0answers
79 views
Ubuntu for phones: fully functional shell?
Will “Ubuntu for phones” work with a fully functional, normal shell/terminal like in Ubuntu Desktop?
I’m working with bash-scripts with the cron and lp commands, and I have problems with these ...
2
votes
0answers
138 views
what can be causing /etc/cron.daily/apt to hang?
Lately I've been getting a mail from the server every day,
Subject
Cron <root@host> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
Body
...
2
votes
0answers
61 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.
6
votes
4answers
2k views
What kind of harm there is from removing (purging) package apt-xapian-index?
I know you can't use Quick filter in Synaptic after purging apt-xapian-index, but is there something more severe?
I know there are some performance issues, when you have it:
...
1
vote
2answers
240 views
Does gnome-schedule run things on startup if the run time is missed?
I have a script that I would like to run daily. I set it up in gnome-schedule to run every day at 00:00, and I'm wondering whether it will run on startup if my computer was not turned on at 00:00. If ...
1
vote
2answers
340 views
Use /etc/aliases for outgoing mail relayed by postfix with local domain
I'm using Ubuntu 12.04 with postfix configured as satellite system that relays outgoing mail to Gmail. For sake of example, my registered domain is example.com I want root cronjobs' error output to be ...
0
votes
2answers
98 views
How to set up directory backup?
I have Ubuntu 12.10 installed running a LAMP stack for a small site I host. I need to set up a system for weekly backups of the /var/www directory where all of my sites are. What is the best possible ...
1
vote
0answers
25 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
1answer
156 views
root cron job not running
I am trying to configure automysqlbackup to run via a cronjob to backup my dbs nightly.
When I execute sudo automysqlbackup from a terminal, the process executes as expected and creates the backup ...
