cron is a task schedueler based on clock time that runs on Linux based machines.
3
votes
2answers
74 views
Found a script on my cron.monthly, i am wondering what's it doing?
I am new to bash-programming, sorry if this might be a kind of stupid question. I found a script on my server and i am trying to understand every line:
#!/bin/sh
#
# man-db cron weekly
set -e
if ! ...
0
votes
1answer
38 views
Cron Job in Linux
I am newbie just have a doubt,
I have a Outerl.sh to be executed on every zip file arrival in FTP and get the *.sh file inside the zip file and execute that (.sh) file which present inside the zip ...
0
votes
1answer
18 views
Why echo $(crontab -l) outputs current working directory listing and only then the content of crontab file itself?
So if cwd is the /tmp now:
crontab -l
> #min hour day mon dow command
> * * * * * /usr/local/bin/growlnotify -t 'helloTitle' -m 'helloMessage' -n 'myApp' -sw
but:
echo $(crontab -l)
> ...
1
vote
2answers
24 views
Circular RSync for Wordpress
I've got 4 servers in a load-balancing setup. And I've got a wordpress app on which I need to upload images. Now there is rsync set up on all the servers on a cron with a 1 minute interval with the ...
0
votes
1answer
57 views
Simple Linux-based task scheduler with job dependencies?
I'm maintaining a data-warehousing system that involves a lot of dependent jobs (data import, transform, etc). I've been using Linux's crontab to manage them until the dependency between jobs get ...
0
votes
1answer
28 views
Ubuntu: how does cron execute jobs?
I am having trouble finding an answer to this question thorough google:
How exatly does CRON in ubuntu execute jobs?
Does it spawn each new job in its own process?
Say i have two cron jobs:
...
2
votes
3answers
31 views
Is it possible to run two instances of crond each with its separate cron file?
How to run two instances of crond with different cronjob files?
Is it even possible?
3
votes
1answer
63 views
Raspberry Pi: open browser using bash and crontab
I'm trying to setup a simple bash script. I want to open the browser.
chromium-browser <url> works if I do it in the cli or in the bash script if I run the script by ./scrpt.
But if I put ...
0
votes
1answer
22 views
Running Cronjobs as per Local Time rather than Universal Time
On running
dpkg-reconfigure tzdata
in terminal and i get 2 different time on my machine
Local time is now: Wed May 1 11:58:55 IST 2013.
Universal Time is now: Wed May 1 06:28:55 UTC 2013.
...
0
votes
0answers
30 views
How can I automatically save a list of open files in Geany, with cron or otherwise?
I use the Geany IDE for programming, and it does not reliably reload my previously open files, for example after a power outage. I found that Geany has a command line feature which returns a list of ...
0
votes
0answers
20 views
How do you commit changes to an XML file to source control when they are changed by the users of a web app?
An admin web app (closed-source, 3rd party) that we use generates XML files into the Linux server where it is running. These XML files contain application settings for a production application. Only ...
0
votes
1answer
55 views
How to resolve Win32 error 1069 when starting cron under cygwin?
The machine runs Windows 7 Home edition. I'm trying to use rsync to backup files to a linux box. The rsync command runs fine in cygwin. I resolved an earlier error by running the cygwin terminal as ...
0
votes
3answers
73 views
How to run a script at boot time for normal user?
I want to run a bash script at boot time in CentOS 6. I added the script in /etc/init.d/ directory but all these script are run by root. I want to run script for any user.
0
votes
0answers
37 views
Cron job not working due to wget error
I'm setting up a CRON job on my MediaTemple DV4 to generate a sitemap. To test I ran the command via the command line:
wget ...
0
votes
1answer
38 views
Running phantomjs with shell_exec under cron job
I have something like this:
$re = shell_exec("sudo /usr/local/share/phantomjs --version");
Unfortunately this gives me another problem:
sudo: no tty present and no askpass program specified
...
1
vote
1answer
58 views
Found this logentry on my server in the cron.logs, seems to be a hack-attempt, any suggestion for further proceeding?
Here is a logentry, which was executed:
mkdir /root/.ssh/;echo "ssh-rsa <some unkown public-key> > /root/.ssh/authorized_keys
I'm guessing that I was hacked. Any advice for cleaning up ...
0
votes
1answer
54 views
Cron Job Command To Delete 0 Byte Files
I need to have a Cron Job, that when it runs automatically deletes all of the files inside of a folder that are exactly 0 bytes.
The script I am using allows users to enter their username so it ...
0
votes
1answer
60 views
Crontab doesn't run my script Ubuntu
My script is located in /opt/restart-hlasic.sh
restart-hlasic.sh contains:
#!/bin/bash
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/
SERVER="XXX"
...
0
votes
2answers
32 views
Crontab - vim preferences
I use vim as my normal edito and so have my vimrc set up in a particular way.
I quite often find myself editing crons with the command
crontab -e
When I do, I edit in vim, but without my normal ...
0
votes
1answer
24 views
Crontab comments on same line as job seem to cause issues
Can you put a comment on the same line as a cron job?
Example:
* 19 * * * lnxuser rm /home/lnxusr/edi/logs/mcfg204_`date -d -8days +\%Y\%m\%d`.log #THIS IS TO WIPE A 204 LOG THAT IS OLDER THAN A ...
1
vote
3answers
49 views
Prevent users from using the same cron schedule?
I've a lot of users in my server using exactly the same cron schedule and this is causing high server load. Can we prevent this?
For example, if there's x numbers of users that use the following cron ...
1
vote
1answer
38 views
How to edit multiple cpanel user cron jobs at once?
I'm using cat /var/spool/cron/* to view all cron jobs created by all cpanel users.
Is it possible to edit its output just like editing via nano and hit save?
0
votes
1answer
341 views
scheduling jobs on mac OSX 10.8.2
I am trying to schedule the execution of a .sh script on max OSX 10.8.2
I am using crontab and am getting an odd bug. If i am at the computer and set the task so that it executes in the next few ...
1
vote
1answer
166 views
git push to github via cron on mac
I'm trying to use git push in a bash script being run by crontab to push a commit to github. At the end of the script I'm doing this:
# script processes some files, then:
git add -A
git commit -a -m ...
0
votes
1answer
42 views
How to execute a php file when a cron job is created
I want one of my PHP file to be executed when the cron job is executed. I want to do this for updating the database of every users. It is a Banking application project and I need to update every ...
0
votes
1answer
67 views
Schedule/cron MS Outlook to run rules
I have a ton of rules configured for my MS Outlook account. However, I'd like to create a "Cleanup Rule" that deletes messages in various folders. I'd like this rule to run every day at a certain ...
0
votes
1answer
29 views
What time does cron.monthly jobs run in SLES?
doc says cron.monthly will be scheduled according to the first run time and it compares /var/spool/cron/lastrun/cron.monthly with current time to run. Question is will it run according to the ...
1
vote
1answer
28 views
SSH: Dismiss read mail messages from Cron
Whenever I ssh to my server box, I get 'You have mail' along with banner message.
Then I type mail, and go through msgs, by hitting enter, until At EOF shows up,
and when I do quit or ctrl+d, and ...
2
votes
1answer
52 views
If I schedule a cron job to run at midnight, will it run at the start or end of the day?
If I schedule a cron job to run at midnight on a specific day, will the job run at the beginning of the day, or at the end of the day? For example:
# Runs at midnight on 20th February:
0 0 20 2 *
0
votes
1answer
45 views
How do I run a shell script with export command in crontab?
I have a shell script that exports values of variables when executed. The same values will be used in another script.
#!/bin/sh
export I="10"
echo $I
I will be using root access for cron.
I ...
0
votes
3answers
168 views
“/usr/bin/env bash” is not found when running from a cron script
I have this in my crontab:
PATH=/usr/bin:/usr/local/bin:$PATH
*/1 * * * * /usr/bin/env bash > ~/cron.log 2>&1
The ouput in cron.log is the following:
/usr/bin/env bash: No such file or ...
0
votes
2answers
81 views
crontab not working properly
When I run a script manually using root it is working fine. when I execute the same script inside cron it is not running. I checked the cron is actually calling the script but the script is not ...
0
votes
2answers
72 views
Execute a root command every 24 hours after startup
I want to execute a command as root on an Ubuntu 11.04 machine every 24 hours. This machine is not on all of the time, but when it is, it can be left on for days at a time. How should I correctly ...
-1
votes
4answers
101 views
How to run the shell script periodically without using Crontab?
I do not have previlage to use crontab -e to run my script. Is there other way to periodically run my script? Basically I need to run it once a week.
2
votes
1answer
40 views
Crontab mis-entered time
I have a crontab that performs a massive operation that needs to run once every five hours
#min hour mday month wday user command
* */5 * * * ...
3
votes
1answer
84 views
system-wide crontab vs. user crontab to shutdown pc
I'm trying to shutdwon my pc at 2 am once a week.
If I use the user crontab of root (sudo crontab -e)
30 2 * * 3 shutdown -h now
the shutdown will not be performed.
However, if I place the same ...
0
votes
0answers
102 views
Simple Image Crawler [closed]
I am working on a web application where I have to implement a basic crawler which will fetch images from some 1 Million websites (stored in database).
I have created the script and currently I am ...
2
votes
4answers
112 views
rsync works fine until I put it in crontab (UPDATE: 'date' doesn't work in crontab)
I've got this rsync command that works just fine when I run it from the command line (Ubuntu Server 12.04.1 LTS). I'd like it to run every hour, on the hour, and output the results (along with errors) ...
2
votes
2answers
34 views
How to find rpm binary of a given process?
Here is the problem: I'm trying to find what cron software is running on my machine, however question applies to any generic process. One way to do it is:
Find the process
ps aux |grep cron
Find ...
0
votes
1answer
41 views
How does scheduling work?
How do programs designed for scheduling (e.g. Task Scheduler in Windows, cron in Unix systems) know that it "is time" for them to run a certain scheduled command or script?
I imagine it's not ...
2
votes
1answer
91 views
Schedule a cronjob everytime it is done
I have a cronjon which runs every 48 hours. But ideally what I want is that it must start running as soon as it stops. Can this be done? It is an sh script consisting of a python command.
I am using ...
2
votes
1answer
145 views
Nice commands in a .sh script for cron jobs
I have this php script that I need to run on shared webhosting.
I have created a cron job that executes an sh script. The command for the cron was:
/bin/sh /home/user/script.sh
So I'm assuming it is ...
0
votes
1answer
476 views
Python script not running as cronjob
I have tried everything and I've seen other questions here regarding this but I cannot for the life of me run a python script as a cronjob.
I've tried the following.
* * * * * /usr/bin/python ...
3
votes
2answers
82 views
find any script which is running for more than say 30 minutes in Linux System
Please share command to find any script which is running for more than say 30 minutes. in Linux System
1
vote
3answers
204 views
Why does this crontab file only run once?
I have the following crontab file:
2 * * * * /bin/date >> /home/jon/date_from_cron.txt
I think this means "run every two minutes". However, it only runs once. Shortly after setting up this ...
0
votes
1answer
44 views
crontab email is not working as expected. First I got the emails at gmail, now I'm not getting them
First I ran a simple test to see if I could get crontab to send me an email. I created the following line:
MAILTO = my_email_address@example.com
1 * * * * /bin/echo "foobar"
This worked as expected ...
1
vote
1answer
60 views
python, cron and the interaction with Growl
I have the following python file called temp.py
import subprocess
p = subprocess.Popen('growlnotify -m \"Program is not running\"', shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
...
1
vote
3answers
110 views
cannot access crontab with sudo after being added to /etc/sudoers list
My user "craig" is in the /etc/sudoers file on my CentOS 5.6 VM, however when I try to access the crontab using the command below I am presented with an error message:
sudo crontab -e -u ...
0
votes
1answer
108 views
Crontab is using some sort of hidden cache?
I used to have a crontab that ran like this
* * * * * /usr/bin/php /var/www/vhosts/default/htdocs/agent/time_keeper.php > /dev/null 2>&1
It worked fine. Now I moved that php script to a ...
1
vote
1answer
34 views
Script acts differently whe run by cron
I have a script that runs nightly, that is returning different results than when I run it manually. I realise that this is a common question and my problem most likely lies in an environment variable ...
