Crontab is a short form of cron table. It is a configuration file that specifies shell commands to run periodically on a given schedule.

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crontab email is not working as expected. First I got the emails at gmail, now I'm not getting them

First I ran a simple test to see if I could get crontab to send me an email. I created the following line: MAILTO = my_email_address@example.com 1 * * * * /bin/echo "foobar" This worked as expected ...
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0answers
35 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 * * ...
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1answer
390 views

How can I set the terminal encoding when running a crontab job?

I have a crontab job which executes a Ruby script on Arch Linux. It works basically, but when I call "googlecl" to post to my blog, it always shows a "safeDecodeError" exception (eg.: ...
3
votes
3answers
1k views

crontab still sending emails even with > /dev/null

I have a crontab (root) that runs a script and output is set to > /dev/null but I always get the emails whenever it runs. I only want to receive error emails. # Rackspace driveclient update (12pm ...
1
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3answers
68 views

Execute script when process reaches 6 hours of lifetime

I wonder if it's possible to execute a perl script when a process with a given PID file reaches a total of 6 hours of lifetime? Can this be done through crontab or similar? The perl script I want to ...
5
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2answers
650 views

Crontab Error Emails: Set Sender to Root Using -f

For a crontab entry in this format, */1 * * * * /usr/bin/php /app/<userid>/command --flag='value' I see this message emailed to <userid>@host (and view via mail) at one per minute: ...
0
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1answer
284 views

redirecting output in crontab

I have a shell script to monitor table stats and java apps. It works fine when I run manually. But if I put it in the crontab it will get stuck if I don't redirect it's output with export display ...
1
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1answer
180 views

Shutting down Linux server on first Wednesday of every month

I have written a crontab entry as: 00 19 1-7 * 3 /sbin/init 0 It should turn my linux server off on the first Wednesday of every month. Unfortunately the server went off on today (Thursday). Can ...
0
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1answer
164 views

Cronjob immediately shuts down mac after boot

I was messing around with cronjob trying to get it to forcibly shut down at a certain time everyday, but now I can't keep my computer on. It boots, loads whatever needs to load on startup, then ...
0
votes
1answer
591 views

Why does this bash script give an error on Ubuntu but not OSX

#!/usr/bin/env sh export $NODE_CONFIG_DIR=/Users/full/path/to/script/config cd /Users/full/path/to/script /usr/local/bin/node main The script runs locally on OSX (if I adjust the paths for the local ...
0
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1answer
35 views

Using undefined time in a crontab job

What happens if you program a crontab job like this: * * * * * the command Will it be executed every minute, or what?
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1answer
133 views

Getting crontab error on Xubuntu

When running the command crontab -e i get the following error: no crontab for 'myusername' - using an empty one 888 Can anyone please help?
2
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5answers
2k views

rsync works fine until I put it in crontab (UPDATE: 'date' doesn't work in crontab)

I've got this rsync command that works just fine when I run it from the command line (Ubuntu Server 12.04.1 LTS). I'd like it to run every hour, on the hour, and output the results (along with errors) ...
4
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4answers
3k views

Is it possible to use variables in crontab -e?

Can I say: MYPATH=/root/scripts MYSCRIPT=doit.sh 0 1 * * * $MYPATH/$MYSCRIPT in crontab -e ? Is it possible to use variables in crontab -e ?
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1answer
312 views

Cron unable to run shell script

I have been trying to get a shell script to run for hours using cron to no avail. I am trying to have the following bash script run every minute #!/bin/bash ...
0
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1answer
1k views

Can't get a script to run on startup in Debian 7

I want to get this script to run on startup on my Debian Wheezy server: /usr/bin/bitcoind so I go: $ sudo crontab -e @reboot /usr/bin/bitcoind 2>&1 >/tmp/bitcoind.out & Then save ...
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2answers
12k views

Difference between /etc/crontab and “crontab -e”

What is the difference between the crontab located in /etc/crontab and the crontab that can be edited using crontab -e?
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1answer
87 views

scheduling a script that accepts one argument in crontab

i am trying to schedule a shell script that runs for every 10 mins, and the script accepts some argument.. i have done it like this 0,10,20,30,40,50 * * * * sh ...
0
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4answers
5k views

Disable cron jobs for a specific user

I have a list of jobs in the crontabs for user1, user2. I want to prevent the jobs of user2 from running. I tried listing user2 in cron.deny, but that only prevents him from accessing his crontab. ...
2
votes
2answers
462 views

Run Crontab anytime after 4pm

I am trying to run a script through crontab in osx 10.8.5 that will run at 4:30. 30 16 * * 1-5 /Library/Frameworks/Python.framework/Versions/2.7/bin/python /Users/lego90511/PycharmProjects/Stock\ ...
0
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1answer
196 views

Why the command substitution in the crontab job doesn't work?

crontab -l: * * * * * /Users/michel/Desktop/myScript.sh myScript.sh: #!/bin/bash /usr/local/bin/growlnotify -t 'Fact' -m "$(/Users/michel/Desktop/anotherScript.sh data.txt)" -n 'myApp' it ...
0
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2answers
147 views

Automating python script on a mac not running

I have tried to have this question answered twice now(1, 2). While both were informative none of the solutions have worked, and I don't know why. The first solution was to use launchctl the second was ...
1
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1answer
65 views

crontab schedule rule misunderstanding

I've got some strange behavior of one rule working unexpected. */40 * * * * myshellcommand here I though it would run each 40 minutes, e.g. 00.00 00.40 01.20 02.00 etc but instead it runs 00.00 ...
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1answer
132 views

Why nothing happens after crontab?

After executing fllowing command cursor skips to new line and nothing happens user@machine:~$ sudo crontab Why?
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2answers
941 views

Automate python script mac

I want to set up a python script to run every weekday(not sunday and saturday) on my mac OSX 10.8.4. From what I have found so far, it looks like I want to use cron. But before I do something horrible ...
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3answers
462 views

Crontab job doesn't create db backups with `mysqldump` command

When I type in my VPS: $ mysqldump --opt --user=root --password=myPass dbName>/home/myuser/dbName.sql it works and makes a backup of my dbName, but if I do it from a crontab job, it creates an ...
0
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1answer
119 views

sending the date in the subject in crontab

In crontab I have the following cronjob working. 0 0 * * * mysqldump -e --user=root --password=MYPASSWORD MYDB | gzip | uuencode db_date +"\%Y-\%m-\%d".gz | mail -s 'date +"\%Y-\%m-\%d"_dump' ...
1
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2answers
1k views

Do I need postfix for /var/mail/root to work?

I want crontab to log errors. As far as I know, this is being logged to /var/mail/root, but it doesn't seem to be working. Do I need to install postfix for this to work?
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0answers
105 views

setting a cronjob in IST time [closed]

I am trying to set a cronjob run in a different timezone..i have goolged a lot and found editing /etc/default/cron is the way to go...but this file is deprecated and I see the following message,so I ...
0
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2answers
684 views

Linux - starting a visible terminal on boot

I have a C program I wrote for debian on the raspberry pi that asks the user to enter a number, 1-4 which it then stores in a configuration file. This only happens if the configuration file is ...
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3answers
804 views

Run crontab non-interactively from script

I would like to schedule some tasks on remote servers by script but am having an issue with crontab expecting to be run interactively the first time. As far as I understand crontab needs to be ...
2
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2answers
1k views

Working with git via crontab

I have the following shell script #!/bin/bash REPODIR=$HOME/work/repository/ cd $REPODIR var=`git fetch --dry-run 2>&1` echo $var > $HOME/error.txt I want to run my script every minute, ...
0
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1answer
189 views

How can I sync cronjobs from one server to another?

What is the configuration file that defines the cronjobs? I know you can crontab -e, but it points to a temporary file.
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0answers
127 views

Enabling crontab logging on openSUSE

I am trying to enable the crontab log on openSUSE 11.3. I searched the web but couldn't find how to do it. I only find information about Ubuntu. Tried editing the /etc/rsyslog.d/remote.conf file but I ...
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3answers
150 views

OsX Crontab having no effect

I am dynamically appending cron tasks to the user crontab The tasks seem to be getting adde, crontab -e looks like: */10 * * * * /bin/sh /Users/john/Kiosk/app/content/update.sh @reboot /usr/bin/open ...
1
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1answer
111 views

Job shows up in crontab -l but not in /etc/crontab

There is a certain job that shows up when I do $ crontab -l and I can verify that this is also running. However, the job is not listed in /etc/crontab. Say the job is /somedir/somefile I can't ...
1
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1answer
284 views

I created Cron but I get errors that don't really understand

I created a crontab like this: 0 22 * * 2 /bin/echo " Hello World " 0 1 * * * /bin/echo " Test" but I receive mails like this, what does it mean? Subject: Cron /bin/echo " Test" ...
0
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2answers
519 views

Linux - switch to “cron” user

Sometimes i have issues with cron jobs not running, and diagnosing why can be difficult. What would be useful is to switch to the same user as the cron jobs run under, so i can see if there's a ...
0
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1answer
167 views

Setup Crontab to work with Cucumber

I'm trying to setup crontab to work with cucumber. So far, I were able to get crontab to execute a ruby command, but not a cucumber command. This is what I have in crontab: ~/test.sh > ...
0
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1answer
104 views

crontab setup on Mac

I'm trying to setup a crontab on the Mac. It just simply prints the message "Hello there!" to the console at a specific time, but it doesn't seem to work. Below is what I have in the crontab: 28 16 * ...
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3answers
465 views

cannot access crontab with sudo after being added to /etc/sudoers list

My user "craig" is in the /etc/sudoers file on my CentOS 5.6 VM, however when I try to access the crontab using the command below I am presented with an error message: sudo crontab -e -u ...
2
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0answers
89 views

Mac Crontab Deleted

I was messing around with creating cron jobs and somehow I wound up deleting crontab out of /usr/bin. Does anyone know of a way that I can recover it without having to re-install multiple components ...
3
votes
2answers
2k views

I want to run an rsync command at midnight but make it stop at 8am. How can i schedule the start AND END of a command?

I want to run an rsync command at midnight but make it stop at 8am. How can i schedule the start AND END of a command? I've looked into cronjobs but that will only start at a certain time. Any ideas ...
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0answers
74 views

Crontab not wroking

I have created a script in Ubuntu. Here is the script: #!/bin/sh DISK_SPACE=`df -k | grep sda1 | awk '{print $5}' | sed '$s/%$//'` DISK_SPACE_LIMIT="58" if [ $DISK_SPACE -gt $DISK_SPACE_LIMIT ] ...
1
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1answer
312 views

Why crontab command is not available to me even I am root

I am using the CentOS release 6.3 (Final). My problem is that even I have logged in as a root to my centos server through ssh crontab command is not available to me . I got the following when ever ...
0
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1answer
43 views

two crons not running simultaniously? [duplicate]

MAILTO="" */10 * * * * /bin/bash /var/www/sym_monitor/sym_start.sh > /var/www/migrate/root_start.txt 2>&1 */10 * * * * /bin/bash /var/www/sym_monitor/stop.sh > ...
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0answers
13 views

shell script not running the other script inside it [duplicate]

#!/bin/bash value=$(</var/www/sym_monitor/man.txt) if [ "$value" == "true" ]; then ps -ef|grep sym |grep -v grep |awk '{ print $2 }'|sudo xargs kill -9; cd /var/www/symmetric-ds-3.1.6/bin; ...
3
votes
1answer
820 views

If I schedule a cron job to run at midnight, will it run at the start or end of the day?

If I schedule a cron job to run at midnight on a specific day, will the job run at the beginning of the day, or at the end of the day? For example: # Runs at midnight on 20th February: 0 0 20 2 *
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1answer
70 views

Long-lasting command in crontab

I want to put execution of my script in crontab every 1 hour. I wrote script that record stream using streamripper. Duration of each stream will be 7 minutes. Is it safe to put this in crontab? Maybe ...
0
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2answers
1k views

Execute a root command every 24 hours after startup

I want to execute a command as root on an Ubuntu 11.04 machine every 24 hours. This machine is not on all of the time, but when it is, it can be left on for days at a time. How should I correctly ...