0
votes
2answers
29 views

Is there any reason this cronjob would fail in cron, but not on the command line?

I have written a little one liner that will email me when a list of files changes - I used sha512 to generate a list of hashes and then periodically check that those hashes still match. */5 * * ...
0
votes
1answer
11 views

btrfs won't run from cron

I'm trying to set up a cron job to create a btrfs subvolume snapshot of my root partition. The command works perfectly if I run it from the command line, but nothing happens at the scheduled cron ...
0
votes
2answers
46 views

crontab is not working

I am using Linux Fedora. I want to create a crontab with SCP command, but it's not working. [shiv@db2 ~]$ crontab -l #this is server to server copy... */2 * * * * date >> ~/$ scp ...
0
votes
0answers
11 views

crond regularly maxes out CPU

I'm running Arch Linux ARM and I've having a few issues with crond. I have a conky that displays the top 5 processes (in terms of CPU usage) and every few minutes, crond will appear at the top of the ...
4
votes
4answers
365 views

How to use “date” to print tomorrow's day of the week

On CentOS 6 Linux I use date +%a in several cronjobs and scripts to generate logfile names like myprog-Tue.txt and this works well for me since many years. But now for one program I need to delete ...
3
votes
4answers
50 views

Is there a way to tell cron to trigger a particular cron job right now?

The cron job for updatedb didn't run because the system was powered off at the time. I'd like to tell cron to run that job now, as if now were the schedule time. Is there a way to do that? For this ...
1
vote
2answers
41 views

cron table mailx caused empty content

I'm using centos 7.0/6.5. The content of /etc/cron.hourly/mail.cron #!/bin/sh log=/var/log/mail.cron.log echo "`hostname` `date`" >> $log 2>&1 mailx -s "test mail" me@example.com < ...
0
votes
0answers
27 views

Disappearing Crontab, Odd Files

I have a number of Debian-based systems running on an ARM-based SBC connected to a network and they've been running for years. All of a sudden, when I log onto several devices, the cron file is ...
0
votes
0answers
34 views

Is it better to use the systemd service unit's Restart & RestartSec, or use a systemd timer unit?

I have a couple of in-house automated scripts running at periodic intervals. One is every five minutes, the other is every minute. They don't really need to be ran on-the-dot; e.g. I don't care if ...
0
votes
1answer
35 views

mysql backup verification

Im not a dabase admin or advanced database user or advanced linux user.. but I would like to know how to verify mysql dumps because I am backing up my own sites manually. Normally when backing up lot ...
0
votes
1answer
66 views

Ubuntu Cron ec2-create-snapshot

I have a new ec2 Ubuntu instance running. I have properly set up the ec2-api tools. I want to create a daily backup using the ec2-create-snapshot command. Just to test it, I have my script, which is ...
1
vote
0answers
34 views

How can I run a cron job from PM to AM? [duplicate]

I want to execute a script once an hour from 20:00 to 08:00. Would the following work? 0 20-8 * * * location_of_script_to_run I'm currently using the following: 0 20,21,22,23,0,1,2,3,4,5,6,7,8 * * ...
0
votes
0answers
21 views

How to parallelize crontab executions to increase user base for web app based on mongodb and mysql?

I have a symfony based web application that runs on mongodb and mysql backend. The principle of the application is that for each user there is a python script that runs 4-12 times a day on cronjobs ...
0
votes
0answers
44 views

cron job monitoring script

greeting of the day!!! please help me a situation, i am trying to develop a script which provides me details which my cron job is commented or stopped which job is running or scheduled. like we ...
0
votes
0answers
8 views

Trying to find dbus session, doesent work

Trying to use notify-send with cron, it needs dbus, what im i doing wrong? var= $(set | grep '^DBUS_SESSION_BUS_ADDRESS=') export DBUS_SESSION_BUS_ADDRESS=$var #!/bin/sh { ...
0
votes
0answers
27 views

Make a script identify DBUS session address and use it

I'm using cron with notify-send to display some notifications, but it requires DBUS session to run Here is the script: export DBUS_SESSION_BUS_ADDRESS=[session] #!/bin/sh { DISPLAY=:0 ...
0
votes
1answer
57 views

WGET/cron downloading webcamera file

our new town doctor put a web camera to his waiting room for people to see how much crowded it is. As my mom and grandparents go to this doctor, I wanted to download the files periodically and if they ...
1
vote
1answer
52 views

Permission Denied in Crontab

I've searched half a day for the answer to this, with no luck. Any assistance will be appreciated. I have a PHP script that modifies the crontab, loads a new cron job, removes some etc. The script ...
-1
votes
2answers
28 views

What is the risk when editing crontab file without the “crontab -e” command?

I developed a script in which I add lines to the crontab file with echo command and I remove lines with sed command. I do not know the risk of that especially that I find in some web site that we ...
0
votes
0answers
30 views

Warning: the connection is closed, while running cron job

I have found on the Internet simple script to download wallpaper from bing and set it. #!/bin/bash # export DBUS_SESSION_BUS_ADDRESS environment variable useful when the script is set as a cron job ...
0
votes
1answer
33 views

Run cron task at specified day of week but at any time

I ran into trouble with cron. I need to run task on my desktop but the thing is I can't guarantee that my computer will be turned on in specified time. For example I need to execute task weakly If ...
1
vote
1answer
45 views

Script not running as cronjob

I got a script which runs in a cronjob as root. The problem is that the addgroup command would output "Command not found" when it gets executed by the script. #!/usr/bin/perl $datei = `ls ...
0
votes
1answer
41 views

Check shell Script copy Status

I have a cron script and i need to adjust it; Actually some clients are generating in a directory some files, my task is to backup that files to a tape, and i need to make a if then else cp $files ...
2
votes
1answer
65 views

Have cron parse SSH config file for server addresses and options

How does one configure cron to parse ~/.ssh/config to get the IP addresses and other options (such as IdentityFile) for SSH? Obviously adding source /home/user/.ssh/config does not help. I do not ...
1
vote
1answer
199 views

Tracking down edits to my /etc/hosts file

Every hour at :49, my hosts file is being replaced with the following: # Copyright (c) 1993-1999 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. # # This file ...
0
votes
1answer
70 views

Shell script truncated when run from cron or at

I'm seeing some very strange behavior on a Linux based NAS (DNS-323) I have. I'm using a simple shell script to back up the files on the NAS to another box. After making some recent additions, the ...
0
votes
1answer
41 views

Use of crontab, kill and trap

I'm learning crontab command, and I'm doing some tries. I edited the default crontab file with the command crontab -e, and I want to put a line that every minute send a SIGUSR1 to the current shell ...
0
votes
1answer
136 views

Editing IPTABLES nat rule in cron job

I am sitting here with an issue: I need to switch the source interface for iptables' NAT rule at a given time. I want to basically do soemthing like this - caution: concept code: #!/bin/bash if [ it ...
0
votes
1answer
106 views

Who starts updatedb process and why it uses 700+% CPU?

I have a VPS running CentOS, and recently its CPU usage goes over 700% for two times already. It always turns out to be a process named "updatedb" (as show in the figure below). After a quick ...
0
votes
1answer
59 views

How to update CRL automatically?

I have the following issue: I have a self-signed CA (certificate authority) mainly for persoanl use (mail encryption and signing, ...). I created several ceertificates and the CRLs (which are empty ...
0
votes
0answers
150 views

Copying file to AWS S3 from a cronjob

This is a script I've put in my /etc/cron.daily on a Ubuntu Server box: #!/bin/sh /bin/echo "Running upload-logs at $(/bin/date) as $(/usr/bin/whoami)" >> /tmp/upload-logs.log /usr/bin/find ...
1
vote
2answers
63 views

Executing PHP from crontab

I am utilizing crontab to execute a PHP file as follows: 0 4 * * * /opt/lampstack/php/bin/php /opt/lampstack/apache2/htdocs/tests/test.php I am pretty sure that the file itself is working properly ...
0
votes
0answers
11 views

logging jobs submitted by at vs by cron

I can schedule a job via cron so that the job's output is stamped at the time the job is run. Pseudo-code: DATE_CMD='date +%Y-%m-%d-%H-%M-%S-%N' * * * * * ~/bin/foo >> ...
1
vote
3answers
1k views

Why does this script fail when run from cron, but works when run manually?

I have a relatively simple bash script that works great when invoked directly, but fails when run by cron. Why does this fail and how can I make it work via cron? #!/bin/bash apt-get update -y ...
1
vote
1answer
38 views

What permissions do I need to give my user to run “shutdown -r 5” command from cron?

I’m have a bash script that I run in /etc/crontab on Linux $ uname -a Linux mymachine.com 3.4.76-65.111.amzn1.x86_64 #1 SMP Tue Jan 14 21:06:49 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux The bash ...
0
votes
1answer
88 views

How do you use the run-parts command?

For some reason my crontab is not running the hourly/weekly/etc scripts. It seems to be that run-parts is not working and I cant get it to work on my local machine as well. Is there a mistake in the ...
1
vote
0answers
52 views

Cron deamon written in shell

I'm looking for a script in bash or ksh, that would do ... more or less ... the same as crond. The situation is, that our system administrator suddenly denied the use of crontab to all regular users ...
0
votes
1answer
26 views

Tools for coordinating crons across users

I often find myself in a situation where I have several cron jobs that want to be run together and rely on certain jobs to be finished before they begin. If I'm running crons that require lots of ...
0
votes
2answers
329 views

RSYNC over SSH requesting password

I looked at numerous question but don't seem to find quite what I'm looking for. I've created a script in which I'm trying to run rsync over ssh, this will eventually be put into a cron job. The ...
1
vote
1answer
157 views

Cronjob for first day of month except sunday

I have such entry in my crontab: 0 0 1-2 * 1-6 It is correct that it would run at 00:00, 1st or 2nd day of the month from Monday to saturday? For example, if 1st day will be sunday then it would not ...
0
votes
2answers
408 views

How to use @reboot in /etc/cron.d

I am migrating individual user's crontabs to /etc/cron.d, as that would allow proper backup, restore and versioning. So far, as I understand the only difference between user's crontabs and the etc ...
1
vote
1answer
58 views

Why doesn't this cron job run?

My cron job isn't running on my system. Any idea why? % ps aux | grep cron root 4213 0.1 0.2 5548 1496 ? Ss 12:40 0:00 /usr/sbin/crond -n crontab.txt: * * * * ...
3
votes
2answers
559 views

Will cron.daily wait for jobs to finish before starting the next one?

This page http://wiki.ci.uchicago.edu/I2U2/WebalizerConfiguration suggests renaming /etc/cron.daily/logrotate so it comes after /etc/cron.daily/webalizer - webalizer should be done before logrotate ...
0
votes
1answer
52 views

How do I monitor resource usage of crond php scripts?

I am using a VPS which is running 5 php scripts on a minute by minute basis using cron. Each script, itself, loops to execute a mysql query then sleeps for between 5 and 15 seconds. They all ...
0
votes
0answers
29 views

Cpanel cron timing issue

I am running a cpanel server. I set a cron task to run every minute. So in my cron tab I set like below- * * * * * php /path_to_script >/dev/null 2>&1 Initially the task added ...
0
votes
0answers
46 views

Rsync delete issue

I implemented rsync to backup the data from the server to my local machine,and done it regularly by cron. It works fine but yesterday it deletes the files from the folders on my local machine but on ...
0
votes
1answer
1k views

Setting Up a Python Cron Job

I hope you guys can help. I've never set up a cron job before but would like to run a daily Python script at 5am on my server. I'm using hosting from CrazyDomains.com.au (Linux server) and can't find ...
0
votes
0answers
29 views

Issues with Cron Mail

I am running a script via cron on a server named backup.server.redacted.org (name made up). The webmaster team's email address webmaster@something.redacted.org, which is the MAILTO= in our crontab. ...
0
votes
1answer
192 views

crontab a bash script that is copying certain files

First I would like to say that I am terrible with scripting so this has been a true challenge for me. Any input would be great! I would like to automate an sftp transfer every 24h. If I am lucky in ...
0
votes
3answers
1k views

SCP not working in CRON job, only manually

I have a script on a remote server (bServer) which SSH's to a central server (let's call it cServer) and kicks a script which further SSH's to 2 other servers (server13 / server14). A script is run on ...