Cron is a job scheduler that allows users to run commands periodically.

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Setting anacron on mac

I set cron to run script every day using env EDITOR=nano crontab -e where I wrote something like this @daily path/to/sript.script Now I want to use anacron to be sure that script is going to be run ...
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42 views

Crontab and screen at reboot

I try to create a cron command that execute a software in a screen during start-up on my Debian. It seems easy by doing this command but it doesn't work (no screen created during start-up): ...
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1answer
55 views

User cron jobs are not being executed any more (perhaps SELinux)

I have the following output as a user running crontab -l: #Ansible: backup-external chaos */20 * * * * flock --nonblock /home/mu/.cache/backup-external.lock backup-external chaos */20 * * * * ...
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249 views

Pg_dump does not work in Cron

I have the command below and run it succesfully: /usr/lib/postgresql/9.1/bin/pg_dump -U dspace --format=c --file=/dspacebkp/dspace_db_$(/bin/date +\%m\%d\%Y)_uncompressed dspace I can see my new ...
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66 views

use find command in bash file

I am using this script in my Linux machine to find all files that were modified yesterday: #!/bin/bash find /home/*/domains/*/public_html/ -name "*.php" -mtime -1 | while read line; do echo "$line" ...
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4answers
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A gzip process regularly runs on my system, how do I figure out what is triggering it?

For a while now, I have had the problem that a gzip process randomly starts on my Kubuntu system, uses up quite a bit of resources and causes my notebook fan to go crazy. The process shows up as gzip ...
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2answers
41 views

Script not running! Also how to attach timestamp in mail?

I have the following bash script... #!/bin/bash # Delete JUNK temp folder if [ -d JUNK/FOLDER/PATH ] then rm -rf JUNK/FOLDER/PATH echo "Cleansed JUNK directory successfully!" /usr/bin/mail -s ...
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32 views

broken cron job after editing it

I'm having some difficulties on understanding why the following cronjob does not work anymore: 30 3 * * * /path/to/backup_script.sh && tar -czvf ...
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1answer
30 views

Is it possible to have cron restart itself each day?

The reason I'm asking is under certain conditions I would like to change the email addresses that cron sends email to. For example I have database of who is on vacation so I would like to remove ...
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35 views

How to set the path for one cron command

I had programmed a cronjob to restart a service with an apparent memory leak weekly and got an email saying that the killproc command wasn't found. That's in /sbin/killproc and I don't want to ...
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41 views

Cronjob python script

I have a python script that parses some html and then writes it to output file. I want that cronjob would execute that python script. When I run this script from command line it works fine (python ...
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694 views

crontab not running for Fedora 23

UPDATE 2 This is a documented issue in Fedora 23. I used the workaround listed here https://bugzilla.redhat.com/show_bug.cgi?id=1263328. It looks like it is working. UPDATE I set selinux to ...
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122 views

How to start cron in Linux Mint 17.3

How can I start cron at startup of computer, so I can use a cronjob to automatically make a backup using rsync. I am not well known with how to start programs in Linux. I am using Linux Mint 17.3.
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2answers
44 views

Control character handling in cron/mailx

I have a cron job which runs a long script producing lots of output. Some of the output is lines delimited by single carriage returns; when run from the command line, these make the successive lines ...
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1answer
34 views

Deleting a file after X days does not work [duplicate]

Ive tried multiple ways of writing this and im executing the script myself so it isnt the crontab that isnt working. These are examples of what ive tried : find /home/backups -mtime +1 -exec rm {} \; ...
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1answer
37 views

Need some assistance with anacron in Ubuntu

I've got Ubuntu 14.04 I try to learn about using anacron. And there're 3 things so far that I can't understand. Please explain! WHEN is the anacron command (tast) executed for the FIRST TIME? Let's ...
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2answers
23 views

which programs benefit the most by cron (for a SOHO user)?

I understand that cron is basically a job scheduler. Apart from doing $sudo apt update which I like/love to run manually as it's uncertain when my bandwidth will be free for running the update, I ...
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108 views

Centos7 crontab @reboot sleep not working

I am currently trying to get my server to relaunch a few things on server reboot but they were failing due to screen not yet being loaded (I believe), in an attempt to fix this I added a 3min sleep to ...
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86 views

Is it evil to link to a crontab?

I think about doing something like: sudo ln -s ~/myCustomCrontab /var/spool/cron/crontabs/username because I'd like to have all customized files in my home directory. Possible risks I can think of ...
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27 views

How to update crontab for a user with a script without duplicating comments

So I've noticed that I've dumped a lot of annoying comments in the top of quite a few crontab files by using crontab -u user -l > /tmp/crontab.user #muck with the file crontab -u user ...
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51 views

Why doesn't `date +%F_%T` work in crontab? [duplicate]

When I use time and date at the end of a crontab line like backup`date +%F_%T`.sql or like backup`date%d%m%y`.sql, my crontab command doesn't work. But when I remove it, it works perfectly. Why ...
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1answer
121 views

How to run a script in a screen on reboot

I want to start a blocking server in a screen on reboot, so that I may access it later. The command screen -d -m /home/dataserv/www/start_production_server.sh works on its own just fine regardless ...
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ubuntu Crontab not running properly

I have to run crontab in xvfb display mode forever when the system restarts...below is crontab code.... @reboot nohup Xvfb :1 -screen 0 1024x768x24 & export DISPLAY=":1" @reboot /usr/bin/forever ...
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Linux Mint 17.2 encounters an error, remounts disk in readonly

I already posted the question actually (Linux Mint 17.2 suddenly loses write access to filesystem), but since it occurs rarely I need to ask again with some new info I gathered. I suspect that this ...
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41 views

setuid.today date format changed after FreeBSD 10.2 update

My setuid.today has a different date format than setuid.yesterday: setuid.today (German localization?) 3 Dez setuid.yesterday Dec 3 I'm getting emails with the diff reports every day. I guess ...
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1answer
74 views

Access to user's session D-bus from their cron commands

What is needed to give cron commands access to the session bus (if it is running)? It used to work for me, on Debian Stretch (testing) since switching systemd until relatively recently (might have ...
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29 views

dstat not installed with cron

I have an auto install bash script triggered by cron, when some condition is met, the install process is triggered. It essentially looks like this: #!/bin/bash if [[ -f "/usr/bin/apt-get" ]]; then ...
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3answers
50 views

script not running as expected when scheduled as a cronjob

I'm trying to write a script that will identify corrupt jpg images using imagemagicks identify command. The script will run the command, grep the output for the word "Corrupt", move it to a corrupt ...
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1answer
107 views

Boot computer on schedule 2 times per weekday [duplicate]

My setup: I use Ubuntu 14.04 to perform a range of tasks. These tasks are performed whenever I execute a bash script. When it has finished the tasks the computer is automatically shut down (I don't ...
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96 views

Issues with a cron script

I have a shell script which does following: Do a scan on websites (URLS coming from all_hosts.txt), Get json reponse which is saved in file (outputscanner.txt) Run a json parser (jq) on above file ...
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34 views

handle large number of same log using cron or logrotate

We have an app deployed in a server, which, under some scenarios, generates some logs in the below format. process_name.hostname.common_text.log.{error/info/warning}.date.time Now, due to this ...
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42 views

Executing a cron 9 to 5 and at midnight

It's simple for the ones who understand it but for me most of the times it's a big puzzle. I want to execute a PHP script 5 minutes after each hour from 9 to 5 and i want to run it once more 5 ...
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1answer
33 views

Gnome Schedule cannot run hdparm

I have set up a cron job that should execute hdparm -y /dev/sda >> /var/log/diskspindown.log 2>&1 When testing it running it via "Run selected task" it executes fine and logs ...
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1answer
29 views

Run certain script periodically at boot time

Suppose the computer is being launched irregularly. And I want to run a certain script at boot time once in a month. But I can't setup a cron job as I don't know whether the machine will be booted at ...
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69 views

Jobs not working in cron, but working manually

I have gone through similar posts in this website, but none of them is matching my query. I have the below content in my crontab, but it is not working. * * * * * perl sc.pl And when i'm trying ...
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cron not running rsync

I'm trying to setup a rsync task using cron. The point is to sync a work folder on a linux partition and its counterpart on a windows partition on a dual-boot computer. To do that, I'm trying to ...
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1answer
20 views

Correct cron format

So I wanted to execute two commands every every week at beginning of Friday 12am and Sunday night 11:59pm before it turns Monday as I want this to be turned on from friday-sunday night then again next ...
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29 views

No indication of attempt to run cron job

I am running the latest Sentora version on an Ubuntu 14 server. I created a cronjob which should run every five minutes but there's no indication of an attempt to run the cron job. I have tried to ...
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39 views

Run minecraft from script in cronjob

I tried making this command run at 10:20pm and then the second at 10:21pm but nothing works. I tried as root and as minecraft user but nothing. How can I get it to work? 20 10 * * * screen -S classic ...
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1answer
109 views

Notify-send doesn't work at Cinnamon

I am using Linux Mint 17. I want to be informed every 50 min, at every hour for small break. Here is cron job: nazar@lelyak-desktop ~ $ crontab -l DISPLAY=:0.0 XAUTHORITY=/home/matrix/.Xauthority ...
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1answer
76 views

crontab doesn't work corectly [duplicate]

I want to make some notification to user every day at the same time: any_hour:50 And I wrote to crontab -e: 50 * * * * DISPLAY=:0 /usr/bin/notify-send -i ...
2
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1answer
58 views

How can I get at to work on OSX?

My at on Mac OS X 10.11 seems to be incapable of launching jobs. I tried: echo "date > foo" | at now Running atq afterwards shows the job queued and no file foo was created. To make sure the ...
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1answer
44 views

Why cron not outputting to file? [duplicate]

I scheduled a cron task: 0 */10 * * * aapa bash /home/aapa/scripts/es_backup.sh &>> /var/log/super/es_backup.log It is running as logged into syslog: Dec 4 08:17:01 dexter CRON[15552]: ...
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60 views

How to view processId of process running in WINE

I'm looking to run some Windows Apps on Linux using Wine. However I need a way to check they are running (and haven't crashed). On Windows I use a Powershell script to check the relevant Windows ...
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Rebooting Ubuntu if necessary

My Ubuntu needs sometimes rebooting if it has downloaded upgrades. Can I automate it like do reboot if it is required and there is no unsaved works and I'm sleeping (say for example 3 am)?
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sort and uniq commands not running as expected when run though cron

Below is a part of script which gives proper output when run manually but gives incorrect output when run using cron: sort < file1.out | uniq -ic |sort -nr> file2.out When run on the command ...
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46 views

how do i make a script to generate a gpg backup saver?

Im making a little backup script that includes the function to encrypt the backup. The script runs automaticly with a cronjob. So the password for gpg is in a File. Its just a textfile. How can i ...
0
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1answer
30 views

How to set Cron job that run after every three hours for indefinite period; with Logging?

I Want to run Cronjob; after every three hours from last run time for indefinite period and can check whether it ran or not Could anyone help me in getting what values to be give in this format: ...
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265 views

Crontab on Mac OSX

I have created an /etc/crontab file on a Mac OS X that runs a few simple commands. I would like to use the crontab to echo a statement in my terminal, logout from the OS (as if I was to point my mouse ...
2
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1answer
29 views

How to schedule task to run everyday, if I don't know when the pc will be turned on?

So, I could use the crontab command, with: 23 0 * ... but at 23:00 my laptop can be turned off, or hibernated. In that case I want a command to be executed as soon as it will be possible. How can ...