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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ubuntu 14.04 qdbus in terminal list more services than when I run it in cron

In xterm qdbus shows: ~/bin$ qdbus :1.0 com.ubuntu.Upstart :1.1 :1.10 org.freedesktop.ScreenSaver org.gnome.SettingsDaemon org.gnome.SettingsDaemon.Keyboard org.gnome.SettingsDaemon.Power ...
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33 views

Cron job not finishing

I have a custom Python script set to run with Cron on a 3-day per week basis. The job runs great, up until a certain point. The job is supposed to ZIP certain directories on my media server, and place ...
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16 views

failed to open fifo for logging: No such file or directory

I have Ubuntu 14.04.2 LTS (GNU/Linux 3.16.0-43-generic x86_64) Installed nginx, php5-fpm, work web site. In syslog more error fifo, what is it? Aug 28 12:17:01 ubuntu-server CRON[30921]: (root) CMD ( ...
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32 views

Is there any alternative for crontab -e? [on hold]

I want to run the PHP script for every 1 minute in server,with out using cron. Is there any other method is there ? (By using cron its working).
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23 views

Cron Convert FFMPEG Problem [closed]

FILE NAME - cron_convert.php chdir('/var/sentora/hostdata/zadmin/public_html/ctkdonline_com/cron/'); set_time_limit(0); include_once 'System.php'; include_once 'vendor/autoload.php'; $sys = ...
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1answer
24 views

Lock crontab / make it write-protected

I am currently trying to build a thin-client with a Raspberry Pi 2 based on Ubuntu MATE 15.04. I needed to write a command in the user's crontab (mate-session-save didn't work with root's crontab) and ...
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13 views

Continuous logging of a filtered TCP stream

I am trying to log messages from a program "adsbox" that sends text lines on TCP port 30003. These lines are ADS-B messages received from passing airplanes. The rate is a couple of lines per second. ...
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33 views

logrotate broken after security breech

I downloaded a PDF which evidently had Linux malware, which executed when I ran the PDF through firefox, or atril, Im not sure which. I figured it out shortly after running clamav, and I believe ...
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9 views

How to get a list of currently running crob jobs? [duplicate]

How can I identify what processes started by cron are running right now?
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2answers
39 views

Cronjob bashscript help

I've looked through a bunch of cronjob troubleshooting guides, but I can't seem to find what I'm doing wrong. This script runs just fine if I run it manually. Running it from crontab just isn't ...
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47 views

how to auto login magento in terminal?

Currently I am trying to get customers data from magento. It was working fine, when run in netbenas (Shift+f6). (I make the magento admin as auto login using the following link). admin auto login: ...
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51 views

Run apt-get dist-upgrade from cronjob

I'm using a 64 bit Ubuntu 14.04 headless server & I thought I had configured cronjob to automatically download updates by editing the /etc/crontab file & adding this. 0 23 * * 3 root ...
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1answer
44 views

Schedule shell script to display output in terminal

I have added a shell backup script to crontab, and it seems to run every night, but I currently need to check the target to see that it's worked. What would be much more helpful would be for the task ...
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37 views

how to run python file again and again in ubuntu? [duplicate]

I am new to ubuntu . I have a python file . i just want to execute it in every 15 min . any body can tell, how i can do it ? with all basic steps Thank you
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22 views

Schedule command during shutdown? [duplicate]

How do we execute a command such as it executes everytime one logs out or shutdowns or restarts the machine ? To be more specific, I want the autotrash to be executed at logout, or shutdown or ...
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23 views

Is it safe to delete ntpdate from /etc/cron.daily?

As I understand ntpd effectively replaces ntpdate. I had an admin mail that showed: /etc/cron.daily/ntpdate: run-parts: failed to exec /etc/cron.daily/ntpdate: Exec format error run-parts: ...
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1answer
24 views

Crontab works incorrectly

I have a job set to run as per below cron schedule 0,15,30,45 * 8-17 * 1-5 However, instead of running only on Mon to Fri and only from 8th to 17th of the month, this job runs every 15 mins ...
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1answer
19 views

how to disable predefined cronjob?

Is it safe (or is there a better way) to disable a cronjob that came with Ubuntu than to just remove the respective file out of the cron.* directory? In this particular case, I want to deactivate the ...
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1answer
52 views

Script running from terminal but not in crontab

My problem is the following: I've made a script called copy.sh in the /var/etc folder in order to copy some .cfg files from there to myfiles #!/bin/bash SHELL=/bin/bash ...
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1answer
36 views

Cron executes old version of script

I defined crontab job by means of: sudo crontab -e As I can see it is listed when I type: sudo crontab -l and it's listed as well when I type: run-parts --test /etc/cron.monthly Than I ...
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45 views

My Cron Job Runs when it Wants to

I am new to this group, so be gentle please. I won't say that I am an expert, but I will say I am experienced with Ubuntu. Recently I wrote a bash script that checks my WAN IP address and emails it ...
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45 views

not getting output in terminal while running the php script

test3cron.php <?php @ob_start(); session_start(); $callbackUrl = "http://mgstore/test3cron.php"; $temporaryCredentialsRequestUrl = "http://mgstore/oauth/initiate?oauth_callback=" . ...
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16 views

Cron Job Not Executing Completely

While executing this shell script as a cron job it returns "Checking for ctl file"and does not execute any of the lines below. Shell Script cd /Input; ctl="/Input" echo "Checking for ctl file"; ...
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51 views

CRON jobs sending email, but I didn't configured it

I'm always taking a look on the logs to see anything suspicious. But, I only noticed today those logs: Aug 3 06:32:10 nori-hidamari anacron[1234]: Job 'cron.daily' terminated (mailing output) Aug 3 ...
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19 views

Why would cron not be running as a daemon?

I'm on Ubuntu 15.04, and logged in as root, but when I run ps -ef | grep cron | grep -v grep to make sure the cron daemon is running, I see the -f option, which means it is running in the ...
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41 views

Copy file from one ubuntu to another ubuntu

By using cron job I've successfully created a backup of mysql database on the Ubuntu. Below is the command under mysqldump.sh /opt/lampp/bin/./mysqldump -u root database-name | gzip ...
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39 views

Cron not working but manually run in terminal works

I placed a command in a script file called app.sh that simply execute an application. sh app.sh When I run it with terminal directly works fine!! but when put it under cron does not work..I tired ...
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29 views

Cron job doesn't execute php file and normal file

I have two files, that needs to be executed every evening. PHP file contains the latest records from database, and creates a source file in same directory. And a normal file, even doesnt execute. I ...
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1answer
77 views

Cannot get cron.service status using systemctl

I noticed my cronjobs were running at the incorrect times, so I changed my time zone. I now need to restart the cron daemon, but none of the commands I'm using are working for me. Every one of them ...
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1answer
13 views

Change timings of unattended updates

I have unattended updates set to run daily on a 14.04 server. It is run by cron.daily at midnight along with other jobs. I would like to change the time that unattended updates runs but not the other ...
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1answer
52 views

Running Bash script at login

This question has been asked numerous times but for some reason, none of the solutions proposed worked for me. I just want to run a simple script after the user has logged in. Here are my attempts: ...
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1answer
31 views

Cron doesn't start any command

I have a problem with cron on my Ubuntu VPS. Wanted to plan reboot for every day at 12:30 so I've used command crontab -e added line 30 12 * * * reboot And nothing yes I am logged as ROOT during ...
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56 views

How to check if a cron job is running or not through php script?

Back to my question How to check if a cron job is running or not?, the answer there is valid which stated to redirect output to a file and test. 15 * * * * /usr/bin/php ...
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65 views

Ubuntu 14.04 - crontab @reboot hang my PC

Trying to resolving the bug for KWORKERS HIGH CPU, as suggested in this answer. I put in my crontab the row: @reboot echo "disable" > /sys/firmware/acpi/interrupts/gpe06 After the reboot, the ...
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1answer
1k views

What happens if you use @reboot reboot in crontab file?

What would happen if you use: sudo crontab -e And add the line: @reboot reboot Will it go into a infinite loop of rebooting?!
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3answers
108 views

How to check if a cron job is running or not?

I added the following command in crontab -e: 15 * * * * php /home/rizwan/PHP-workspace/mgstore/testcron.php I need to run testcron.php every 15 minutes; for testing purposes I used the following ...
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1answer
27 views

Suspending when CPU idle

I am using 14.04 (Trusty). I have Power -> Suspend when inactive for 2 hours. This works fine if I am logged in and then walk away. But if I am not logged in, it never suspends. Moreover, I understand ...
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1answer
27 views

run script from directory using cron

I have this in my crontab: 59 23 * * * /home/peter/Documents/script.py > /home/peter/Documents/log.log 2>&1 But I keep getting /bin/sh: 1: /home/peter/Documents/script.py: not found in ...
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1answer
21 views

Why doesn't my second cron task get run?

I have these two task to be run. The first one gets run every 1 minutes and I want the second one to be run at hour:minute every day every month. */1 * * * * python /root/vine/hei.py 22 20 * * * ...
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29 views

Accidentally enter “crontab” without -e

Now my root crontab is entirely blank. I enter some crone tasks into this blank crontab(I typed crontab -e again). Even though I see cron is running(pgrep cron returns a number), no cron job is ...
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28 views

How to interpret this code?

I setup a cronjob send me notification using notify-send. I tried several methods from different several site and then finally below code works. 55 * * * * eval "export $(egrep -z ...
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1answer
61 views

Improperly set display when running a root crontab job involving GUI

When running the script below from my local user crontab, with sudo before /usr/bin/FreeFileSync (last script's line), a small progress window opens on my GUI and things go well. The only thing is I ...
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1answer
42 views

Script to program periodic switch-on and off

My PC has a problem in its motherboard so when it's inactive for many hours after being on it won't start up, both when it's completely switched off or suspended. It takes between 8 to 18 hours to ...
2
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0answers
48 views

cron.daily gives apt error. “not found”

I recently upgrade to Ubuntu 15.04 and after that I get these strange errors in my cron e-mail. Sadly I didn't remember what version of ubuntu I was upgrading from but I think it was the latest before ...
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2answers
119 views

How to run a cron job every 36 hours?

I have been blowing my mind over few days to do this.. (Don't ask me why I want to do it!) How about adding two jobs like this? 00 06 current_day-31/3 * * job 00 18 next_day-31/3 * * job
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1answer
185 views

How do I run a bash or python script via cron, visible on the local desktop

I have a production server that runs several bash scripts on the local desktop. Two scripts run all the time and don't need to be stopped. I have a third Python script that I need to start at 9AM. It ...
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28 views

Any problem launching script with infinite loop using cron?

If I run a shell script containing an infinite loop using cron @reboot, will that hang up the cron daemon or does cron keep moving and not wait for the job to terminate?
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1answer
78 views

MySQL Crontab Check

I have a serverpilot.io server running from digitalocean (1gb Ram), MySQL will crash once a week, the stats say the server is using ~256 mb out of 1 gb, but mysql will crash saying out of memory.... ...
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2answers
70 views

How can I start Steam with a cron job?

How can I start Steam using a cron job? I've tried just putting steam in cron, but it does not work. I've tried some odd stuff that I don't understand like DISPLAY=:0.0 steam %U but that does not ...
2
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0answers
25 views

Crontab not running 24 hours

I've the following job in /etc/crontab: @hourly root /usr/bin/script Here is the script: #!/bin/bash killall tcpdump date=$(date +%G%m%d-%k%M) tcpdump -n port 5060 -w ...