Cron is a time-based job scheduler in Unix-like computer operating systems. Cron enables users to schedule jobs (commands or shell scripts) to run periodically at certain times or dates.

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Why am I seeing much more cron jobs in webmin than in `crontab -e`?

I am just starting to learn cron jobs. Basically I am going to use webmin to manage my cron jobs, I am also reading some basic information about cron jobs. So far I've learned that /etc/crontab ...
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33 views

ZFS Send Script works when run manually but not in Cron (Already tried common solutions)

Script on sending end is as follows: #!/bin/sh #Variables bigdata=vid-zfs-live/bigdata today=`gdate +%m-%d-%y` yesterday=`gdate -d'yesterday' +%m-%d-%y` #Actions zfs snapshot -r ...
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10 views

Wyse Enhanced Ubuntu Terminal Locked Down?

I'm dealing with about 20 Wyse T50 thin-clients and I want to set up cron, however, it seems like there are a number of things locked down in the Wyse Enhanced Ubuntu terminal. For instance, ...
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8 views

Linux last login get the logins yesterday and email it the next day or specific time via crontab

I need to know the last login yesterday and email it to me via crontab.... Since the last command shows all the login you need to scroll up. Using grep and cut might do the trick.
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61 views

Scheduling a job to run every 23 minutes

There are cases when I need to run a scheduled job in more complex way that Cron is able to provide. Say, to schedule a job to run every 23 or 65 minutes. In the latter case it can be worked around ...
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24 views

Cron jobs running 9hours 15min late

I have a Cron Job set to run Nightly at 22:01 followed buy three others at 23:59 02:10 and 02:15 The Cron log shows that they are kicked off at the correct time.. :cron.log file snippet: Apr 12 ...
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29 views

Error configuring Cron with php command

So i have been configuring a phpIPAM server and as the documentation suggests, to make an automatic discovery of hosts, i need to use a scheduled process. I have tried in /etc/cron.d with no luck and ...
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41 views

User management with cronjob [closed]

In my organization, we want to implement a user management standard after an utter chaos. Where we(organization) and the client was able to access root user and they made changes which took down the ...
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2answers
13 views

Cannot locate currently running cron jobs

I know this is a dumb problem, but I cannot seem to locate/access a group of cron jobs that I have running (which I know are running, because everything is working properly and we can see the expected ...
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6 views

Cron seems to be missing [duplicate]

I have a self installed VPS running CentOS 6.5, with no panel. logs do not appear to be rotating, but all the logrotate configs look fine. There is an etc/cron.daily directory with a logrotate file in ...
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3answers
31 views

seetting cron on server issue with saving and exiting [closed]

I am new to servers and I want to setup cron. I want to check if cron is running on the server. To do that I use the following command. crontab -l I looked on Google for a command to check what is ...
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34 views

Add date using echo without calculating [closed]

I should add the line to /var/spool/cron/crontabs/root on my ESXi: /bin/echo "0 3 * * 6 /ghettoVCB-master/ghettoVCB.sh -g /ghettoVCB-master/text.conf -f /ghettoVCB-master/text.list > ...
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1answer
34 views

Script to remove suspended accounts automatically from Linux server [closed]

I have Linux hosting server with centOS, which have WHM installed on it. To reduce the costing and mis-usage of Disk space i am creating a shell-script which automatically removes the suspended ...
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1answer
38 views

Cron Job error says ioncube is not installed when it is

I have a website (mivprofit.com) and this website works with a script that requires a couple of cron jobs to run once a day. I have a cron email set and whenever the cron job runs this is the email ...
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2answers
157 views

Unable to run a python3 script in CentOs7 [with python2.7] via cronjob

I have been trying to deal with this strage problem all morning. I have a simple crawler.py file, which contans a code that can only run under python3 to be exact under python3.3 evenrionment Now, ...
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27 views

Scheduled Cron Jobs auto Deleted after few days

i am using CentOS Linux 7.1 with control panel webmin virtualmin and now after upgrade webmin i am facing a problem with my crontab and the problem is which cronjob i have made by me these all are ...
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22 views

Anacron fails to open folder cron.daily

Recently I switched from user-specific anacrontab ( using -t ) to the global-one. Now each day anacron drops me a message (email to root) that it failed to open the cron.daily folder: Subject: ...
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1answer
24 views

env not working in FreeBSD cronjob [duplicate]

On my FreeBSD server, I have setup a cron script for backups using Duplicity. This script is as follows: #!/bin/sh export PASSPHRASE= export FTP_PASSWORD= keyid= remote= excludelist= ...
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1answer
69 views

cronjob error “/bin/sh: /path/to/file: No such file or directory” [duplicate]

i've installed a python software that allows to run javascript on the server i've put the binary file (jsrunner) in this address /usr/local/bin/jsrunner so in the ssh when i try it it works fine ...
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16 views

Yum-cron output to both email and log

When configuring yum-cron on a CentOS (07 x64) host, i noticed the following option (/etc/yum/yum-cron.conf) - # How to send messages. Valid options are stdio and email. If # emit_via includes ...
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1answer
32 views

Cronjob doesn't run. Similar cronjob does run. Issue with Env Vars??? Fedora involved. psql involved [duplicate]

I have cronjobs like so * * * * * /usr/bin/psql -U usename dbname -c "select usename, now(), pg_terminate_backend(pid) from pg_stat_activity where state like 'idle%' and (now() - query_start) > ...
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90 views

Cannot allocate memory problems - update-notifier-common

I'm running a Ubuntu 14.04.3 server on a Digitalocean droplet with 1GB RAM. I'm getting weird memory allocation errors, even though I have plenty of memory available. I started noticing this from the ...
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29 views

cron - How many times the cron job will run when given aterisk(*) on all positions [duplicate]

If we define a cron job with * * * * * /some/task/to/perform, how many times the job will executed in 60 seconds?
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30 views

nginx stop logging after crontab modified the log file

I have a web server(django) running on nginx + gunicorn. nginx writes its regular logs to: ~/myproject/log/access.log and it writes errors to: ~/myproject/log/error.log it works pretty well for ...
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40 views

Cronjob: E-Mail with Cronjob output from mailutils is empty

I am tempering with my cronjobs to change the sender and subject for emails sent by the cronjob. For sending emails I installed the mailutils package on Ubuntu 14.04. This is how I am sending my ...
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1answer
24 views

What is the “cluster” cron job?

I understand that cron job is some task running automatically on unix-like OS. My server is ubuntu14.04 with webmin installed. I was trying to setup a cron job through webmin, there is this "cluster ...
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386 views

Why does `crontab -` remove crontab, and can it be cancelled?

I hurried and forgot the e in crontab -e before I hit Enter. A prompt appeared, so I closed with Ctrl+D, same as I usually exit input prompts. Now, without warning, my entire crontab is empty. ...
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27 views

Crontab by hostname

My system is having 3 nodes and the cron scheduling is defined in one of these 3 nodes. So while checking with crontab -l at times I am getting proper cron listings at times I am not as the node ...
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1answer
38 views

Debian: How to lock root account AND still use cron. (cron does not work while locked account :( )

I'm setting up a small private server which is connected to internet. For security reasons I would like to lock my root account after setting everything up and then use a sudo user for further ...
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33 views

MySQL Backup Cron Job

I have a cron job which backup up my MySQL database by exporting it. The script includes the root password to get the job done. I get the message: Using a password on the command line interface can ...
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15 views

How to change $PATH for crontab in Opensuse [duplicate]

I have a script written which works perfect on terminal however gives error when called through crontab. It took me a while that the problem is with the cron environment not my script. so I tried ...
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1answer
36 views

IPSec Tunnel goes down during long periods of inactivity

I have 2 AWS regions I have connected using an OpenSWAN IPSec tunnel. This works great in our production environment but in our test environment where 1 of the regions has long periods of inactivity, ...
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51 views

$0 empty in script when run by cronjob [duplicate]

I am trying to setup automated backups for an AWS EBS volume and using https://github.com/colinbjohnson/aws-missing-tools/tree/master/ec2-automate-backup to do so. The backup script used is the ...
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3answers
297 views

Cron appears to run but doesn't execute in the same way as when run manually from the terminal [duplicate]

I have a php script that connects to an external API returns some data and updates a database table. I can run this directly via my command line / SSH terminal and it works fine (takes about 5 minutes ...
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1answer
44 views

bash scripts work fine when I run it from command line but not from cron [duplicate]

I have this bash script in runtests.sh file #!/bin/bash cd /Library/WebServer/Documents/protractor_clipboards protractor testscript.js When I do this on terminal ./runtests.sh But when I try to ...
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1answer
50 views

Error in crontab - bad minute

could anyone give me a clue what am I doing wrong in the crontab below? I'm getting bad minute error... Here the entries: 0,15,30,45 * * * * /usr/sbin/netdate -v time.server.com > /dev/null ...
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1answer
58 views

Running cron job manually and immediately with PHP

I just wanted to run all my cronjob manually and immediately, following command works well in command line terminal but not working with shell_exec crontab -l | grep -v '^#' | cut -f 6- -d ' ' | ...
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2answers
81 views

nginx logs just failed weekly rotate, how do I determine why?

After I installed nginx, its logs have been rotating weekly as per a weekly cron job on Sunday 00:00 However this week the logs failed to rotate, and I can't figure out why. The only thing I can ...
0
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1answer
19 views

When triggered, run script at top of the hour

I have a service that must be started at the top of the hour, any hour. Whenever that service goes down (during a reboot, etc) PRTG Network Monitor will know. PRTG has the ability to run a script when ...
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1answer
26 views

Run every 10 minute but start from 5

I want to run my code each 10 min, I want do it with */10 * * * * ceasor sudo python /home/ceasor/Desktop/script.py but I want it start from 5 instead of 0, I mean want it run on 5,15,25,35,45,55 ...
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130 views

using flock with cron

I need to prevent a script from being executed multiple times simultaneously and so flock seems right up my street. What I can't figure out is if I need to manually delete the lock file after the ...
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1answer
118 views

Linux(redhat);Crontab; bash - script working from shell but not in Crontab - assigning command to variable fails

I know that my question was asked several times, but there is no solution for my problem. In my Company there is an Application running on a RedHat Mashine. Users connect a text Based GUI via ssh to ...
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1answer
25 views

CronD ignoring command and running hourly

Having a problem with Cron on Centos7 it appears to be running my command 5 * * * * root curl http://www.(removed)/Ebay/GetOrders.php every hour instead of the 5 minutes i set some of the log: ...
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2answers
45 views

Ran chkconfig but crond not starting on reboot on Amazon Linux

I am trying to get the cron daemon to start on reboot on an instance of Amazon Linux (Linux version 3.14.57-34.46.amzn1.x86_64). I have run: $ sudo chkconfig crond on If I run: $ chkconfig --list ...
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2answers
52 views

Logrotate not run [duplicate]

I use ubuntu 14.04 I try to run logrotate each 10min and remove all logs files bigger then 2MB, I try a lot solution but nothing not work, my logrotate run just 1 per day, I try solution with moved ...
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14 views

(Git-) Process not ending properly [duplicate]

I use a cronjob to call a git pull every minute: MAILTO="" */1 * * * * /home/pull.sh script: cd /home/webdir git pull origin release | grep -v "Already up-to-date" >>/home/git.txt This ...
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1answer
79 views

Is it ok to run the `ntp` cronjob hourly?

I have several servers in Amazon EC2. Having noticed time difference on the instances I have installed ntp. I see /etc/cron.daily/ntp Cron job was added. Still I notice that, for some reason, the ...
2
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0answers
13 views

crontab executing my own script [duplicate]

It's the first time after ten years of linux os (debian). I've a script in user home: /home/user/bin/script1.sh with correct permissions. Using shell, script runs. Inside crontab: 30 13 * * * ...
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33 views

How to aggregate a large cron mail volume

How do you handle a large volume of cron mails (from a thousand servers) in a smart way? Main use case: a cron error comes in, but its severity does not warrant immediate action. However, I do not ...
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142 views

Secure yum-cron.conf configuration and prevent them from getting auto-updated

The last CentOS upgrade from December 3, 2015 rpmsaved the /etc/yum/yum-cron.conf file and replaced it with the new one on bunch of the servers I manage, which had previously been configured with the ...