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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398 views

Start Tomcat through cronjob

To make sure that Tomcat is running all the time, I wrote the following shell script #!/bin/bash status="$(curl -s http://www.domain.com/check)" if [ "$status" != "OK" ] then ...
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1answer
60 views

How can I tell a script is running under cron?

Is there a standard way to know if a shell script is running under cron as opposed to running from the command line. i.e. I'm thinking of running with more verbose output when manually kicked from the ...
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2answers
94 views

Do i need to restart after editing anacrontab?

To help trouble shoot a few servers, I have edited the delay time in anacrontab. Do I need to restart anything for these changes to be applied? Thanks
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2answers
62 views

cronjob not running daily

I am a linux newbie. With that said I need a cronjob to compress some syslog files after 48 hours to keep the size manageable. These files are currently located in /syslog - a disk I added to handle ...
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1answer
168 views

Crontab - I have two cron jobs but only one works [closed]

I use ubuntu 14.04 LTS. I have created 2 cron jobs but only one works. The 2 different website building with drupal cms. */5 * * * * curl -s ...
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1answer
71 views

WP-CLI doesn't run from cronjob

I made a bash script that uses WP-CLI and was intended to run from a cronjob. It runs fine from SSH, but fails when run through cron. During debugging I discovered that it was the WP-CLI part that ...
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2answers
85 views

Odd Crontab Service SMB Restart Issue

System: Debian Wheezy x86_64 Service: Samaba So when i'm in a terminal i can use service samba restart or /etc/init.d/samba restart to restart the service. When I create a cronjob and do ...
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0answers
29 views

cron job time managment

I have cron job A and B (both jobs run every minute) from 9.00AM to 6.00PM I like to make the second one run after the first one in 30 second.both cron job should be run by root user. for example if ...
3
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1answer
246 views

Cron Daemon Wget blocked

I've got Nginx on Debian 7 without cpanel. I am seting-up my Crontab like this: */45 * * * * wget "http://example.com/cron-url.php" >/dev/null 2>&1 The above cron is being blocked with ...
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1answer
54 views

Wal-E cron job not executing

I have a cron job setup that is suppose to be running the wal-e backup-push command. The command works fine if manually ran through the command line. As the postgres user of course. So I setup a cron ...
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2answers
84 views

Add cron job to save a web link into txt file

I need to setup a cron job to save a webpage info into a text file in a specified folder at every hour. here is what I've tried: crontab -e in insert mode I typed: 0 * * * * wget http : // ...
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1answer
40 views

Check how much time has elapsed for Cron job and send email

There is a cron job that is set which runs throughout most of the day, sometimes the job gets stuck and I would like to set a time or check on it which let's me know if it has been stuck for more than ...
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1answer
39 views

cron: What means mail error status “0x0002#012”

I have a cron job specified in the crontab: ... MAILTO=root ... ... 47 09 * * * tst nice -n 15 /opt/tst/bin/doMirror ... The doMirror script fails because of a syntax error. I had expected that the ...
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2answers
25 views

Is it possible to determine if a job is being started as an at job (kicked off via atd/cron)?

Is there a way to identify a script is being run as an at job instead of interactively from the shell by a user? Some of our scripts have a guard to check if they're running in screen by checking ...
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1answer
65 views

Restart periodically two linux server with master slave dependency

My system is configured as follows: database server on a linux server web application on another linux server For sanitation purposes I would like to restart these servers during night at least ...
0
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1answer
52 views

Ubuntu VPS not running cronjob [duplicate]

I used sudo crontab -e to add the following cronjob 0 0 * * * /usr/bin/php /var/www/path/to/artisan elite:reset-user-likes The command works correctly if a type it myself on the terminal. I also ...
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1answer
37 views

Why does nvi think I have files being editing?

I've got a couple of FreeBSD servers that throw several copies of the following error on reboot: On Wed Oct 10 15:13:16 2012, the user root was editing a file named /tmp/crontab.s00huOAZD2 on the ...
2
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1answer
60 views

User crontab not accessible

I cannot edit my user crontab without being superuser. I expected the following to work, but I get an error message: $ crontab -e crontabs/gauthier/: fdopen: Permission denied The following is ...
1
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1answer
208 views

OpenShift cron does not run

I have the following file [subdomain.rhcloud.com minutely]\> pwd /var/lib/openshift/username/app-root/repo/.openshift/cron/minutely [subdomain.rhcloud.com minutely]\> ls -lha total 4.0K ...
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1answer
50 views

Is there a way to check the syntax of a crontab file without actually installing it?

I know that "crontab -e" performs a syntax check before attempting to install an edited crontab. However, I am looking for a way to verify that the syntax of a crontab file is correct, even if: the ...
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1answer
339 views

“apt-get -y upgrade” in cron task runs but does not upgrade the system

This server runs Debian 7 and I'm facing a big mystery. Here are my cron tasks: $ sudo crontab -e 42 15 * * * apt-get -y update >> /var/log/my-apt-update.txt 52 15 * * * apt-get -y upgrade ...
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1answer
60 views

Cron needs restart in order to process modified /etc/crontab

I know there are many questions about this which say it will work right away. Alas, at least on our newer SLES (Suse Linux Enterprise) 11 SP3 systems, that no longer seems to be the case. (You have ...
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1answer
198 views

Cron daemon reporting “unknown user 'tomcat6'” every day since I removed tomcat

I'm running Ubuntu 12.04. Since I removed tomcat via aptitude purge the other day, I keep getting the following error from Cron daily: /etc/cron.daily/logrotate: error: tomcat6:7 unknown user ...
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2answers
221 views

cron job sending emails in a wrong charset

I have following command in a cronjob: */5 * * * * php /var/www/domain/yii rss/parse It outputs email in a wrong charset: Content-Type: text/plain; charset=ANSI_X3.4-1968 But when i launch that ...
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1answer
88 views

Unable to send external email via crontab

I'm trying to send email out from crontab. I've tried making crontab run a basic shell script, as well as specifying the actual command within the crontab. I've tried doing this with mpack and ssmtp . ...
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1answer
36 views

Send email on ldap creation

I have an LDAP server setup on a server running Debian 7 and I wanted to make it send out an email whenever a new user was created on that LDAP. I thought a cronjob would be best, but I have no idea ...
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1answer
171 views

Cron occasionally fails with “grandchild #X failed with exit status 3”

I have cron jobs and every now and then they fail. Just after log message that the command has started, there is grandchild #X failed with exit status 3 message. On the next run scripts finishes ...
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1answer
295 views

Openshift cron not working

I'm using OpenShift and I have a shell script that is executable and can be run from the command line, however cron doesn't seem to even attempt to run it. I have placed my shell script in ...
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3answers
2k views

root + crontab : permission denied [duplicate]

I'm using Debian 6, all patched up, but when I try to access crontab as root, I just get a permission denied: root@server:~# crontab -e -bash: /usr/bin/crontab: Permission denied Please note this ...
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1answer
1k views

Cron jobs fail to run on raspberry pi (STAT FAILED shows in syslog) [closed]

I have a Raspberry Pi server in a remote location (it's a weather station). I have set up a few python scripts that I would like to run via cron. Sometimes, everything works fine. Other times, none ...
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1answer
77 views

How can I flush and/or rotate cronevents?

Can anyone tell me how I can flush / clean / zeroize or better still rotate the contents of cronevents? I need to solve this, because I am attempting to 'productionize' my fileserver instance-pair ...
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1answer
83 views

CURL isn't running from Crontab

Here is the output. Not sure if cron isn't running or other issue. If I issue curl --silent http://..../scanner.php from terminal, I'm getting desired output. Actually scanner.php do some check and ...
3
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1answer
172 views

How can I find what's starting crond?

I need to stop crond at the command line. (I'm writing a script which needs to stop it, do some work, and then start it again. I'd rather not remove and replace the crontab file because it's more ...
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1answer
98 views

Automysqlbackup - dumped files have wrong permissions

This question has been askewd here. But it was not answered. I just got a 3rd server and on all 3 servers I use Automysqlbackup script to create MySQL backups. I do it with cronjob: 52 04 * * * ...
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2answers
123 views

Hourly Clamscan cron script failes at reading file list

I've this piece of code located in /etc/cron.hourly/hourlyclamscan. #!/usr/bin/bash # Create Hourly Cron Job With Clamscan # Directories to scan SCAN_DIR=/home/transmission/Downloads # Temporary ...
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2answers
606 views

Is there a way to restart automatically the HHVM service if I get a '502 Bad Gateway Error'?

I've reported the error on stackoverflow - from time to time my Nginx/PageSpeed+HHVM+MariaDB+WordPress blog stops working. There is some problem with the HHVM service that I don't locate, and I'm ...
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2answers
2k views

Cronjob run every two weeks, on Saturday, starting on this saturday [duplicate]

Today is Friday, October 3, 2014 3:58 AM I want to schedule a cronjob like that to run it at the following dates: Saturday, October 4, 2014 8:00 AM Saturday, October 18, 2014 8:00 AM Saturday, ...
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2answers
151 views

crontab's invalid time checking is inconsistent

One of our DBAs created the following crontab entry to run a backup every 3 hours starting 6:30 AM to midnight every day: 30 6-24/3 * * * (path to backup script) Cron took the entry but did not run ...
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88 views

pppd call to restart VPN ineffectual from a CRON

This works when I run it directly but never from a cron it is the 'pppd call OM01' which seems to be ineffectual when run from a cron. #!/bin/bash # vpnTest.sh test if you ping via the VPN # if ping ...
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2answers
1k views

What mailer does cron use to send mail?

I am trying to debug an issue with cron not sending mail on a Centos 6 box that I did not configure. How can I determine which mailer cron is using to send mail? The crontab man page has this to say, ...
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1answer
102 views

Cron bash script skips second do/done set

I have a script that checks IPs for ping reply then tries to run an snmpwalk on them. I am trying to schedule the script to run weekly in cron. When I run the script in the shell, it runs perfectly. ...
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0answers
106 views

cron vs anacron on server machine (AWS instance)

During review of environment which I took over I've discovered that Amazon Linux uses anacron by default which means that cron.weekly jobs are executed somewhere between 3a.m. and 10p.m. Moreover - ...
0
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1answer
71 views

Daily postgresql cron error log file

I am getting these emails daily: /etc/cron.daily/logrotate: error: error accessing /var/log/postgresql: No such file or directory error: postgresql-common:1 glob failed for /var/log/postgresql/.log ...
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1answer
272 views

Sending cron output as a text file attachment

I sysadmin a multiplayer game at CentOS 6.5 Linux server for a customer. The customer has requested me to send the daily chat logs (to identify and ban agressive players) - as a text file ...
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1answer
93 views

Cronjob for a bash script pauses for 2 minutes randomly

I have been running a bash script on CEntOS 5.5 machine that checks replication on a remote mysql server. The script creates a temporary lock file and is scheduled to run in Crontab every minute. But ...
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1answer
19 views

some services switched off automatically

with my company we have a VPS. We have some issues with it. this morning the pure-ftpd was stopped. I had to start also postfix and the cron jobs were off for 3 hours. My config : Debian GNU/Linux 7 ...
2
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1answer
669 views

Should I use cron.hourly or crontab?

It seems that all the suggestions for using/scheduling awstats is via crontab, as such: 0 * * * * /usr/local/awstats/wwwroot/cgi-bin/awstats.pl -config=mysite -update >/dev/null (running awstats ...
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1answer
60 views

zip in cron doesn't work, but zip from command is working [duplicate]

I need to back up a directory with zip -r /savehere/backup_`date +%y%m%d%H%M%S` /save/this -q It works fine. But not from crontab: * * * * zip -r /savehere/backup_`date +%y%m%d%H%M%S` /save/this ...
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2answers
391 views

crontab fails, cannot find aws executable

I am trying to run a backup script on my ec2 amazon server (ubuntu 14.04), to automatically create a snapshot of amazon ebs volumes. Therefore I am using the aws-missing-tools script: ...
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1answer
46 views

simple crontab every 5min not working [duplicate]

I am trying to setup a crontab to execute a command from a specific user. Here is my code in "crontab -e". Why is this not working ? */5 * * * * user /home/user/whoami>swag.txt I am running ...