General :: Difference Between /etc/crontab And "crontab -e"

May 29, 2011

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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General :: Crontab Not Working \ Edited Crontab File Using Crontab -e?

Apr 27, 2010

I am using Linux 64 bit Redhat Linux. I am trying to setup simple crontab as follow...1. Edited crontab file using crontab -e2. Listed the file once to verify it using crontab -l. This will display as.. 18 5 * * 2-3 ksh $HOME/testScript.sh > $HOME/testscript.out3. Logged in a root and restarted cron deamon using "/etc/init.d/crond restart"As per my understanding now my testScript should start running at 5:18 am Thuesday

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General :: Possible Disabling Crontab Job Without Deleting Crontab Description Entry

Jun 23, 2011

is it possible disabling a crontab job without deleting the crontab description entry (by crontab -e)?I could also accept to change the entry itself. Now it's:0 0 * * 0-6 /home/me/cron/script.csh

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General :: Difference Between Manual Run And Crontab Run?

Jan 15, 2010

My predecessor wrote a perl file that is run manually twice a month to send a set of emailed reports to one of our clients. My boss has requested that I look into automating this; it seemed simple enough, and I thought I had it set up, but I'm running into a rather strange problem.

Both the emailing program (in perl) and the report files themselves are kept on a Novell server reached from our Linux box via /mnt/srv/path/to/file/. From the linux box, I can see and manipulate them fine. The files are displayed as having 755 permissions across the board. The Linux box itself is running SuSE 9.3.

A manual run of the emailing program works fine; the files are sent out as expected. However, when I tried to set up a crontab entry for this, I'm running into trouble. I manually edited /etc/crontab to include a line setting the program to run at '0 21 * * 1,2,3,4,5'. The program itself runs fine, but errors out every time it tries to attach a file; the error message is one that various perl sites indicate means 'could not read the path to this file'.

What's the difference between a cron run and a manual run? What are some possible reasons the former fails and the latter works?

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Ubuntu Servers :: After Using Crontab With /etc/crontab / Giving Error "can't Find Command Root"?

Aug 26, 2010

I have a question about using crontab with /etc/crontab...

I had a cron job that I needed to run as root. At the time I thought that sticking it in /etc/crontab would be a good idea. However, I used the crontab command to edit /etc/crontab, which I guess is not standard procedure? Specifically, I configured /etc/crontab as my local user's crontab (i.e. sudo crontab /etc/crontab) then added my cron job as I would a local user crontab (i.e. sudo crontab -e).

Originally, my cron job looked like this:

30 * * * * root /my/batch/script &> /dev/null

After adding the new cron job I started seeing errors. Something to the effect of "can't find command root" or something similar. So I removed the 'root' user definition from the cron job and the job started running fine. However, because this is /etc/crontab, there are other system related cron jobs that have been defined to run under the root account (e.g. "17 * * * * root cd / && run-parts --report /etc/cron.hourly" runs as root, etc.). So these pre-existing system cron jobs, which up until now have been running smoothly, are now generating "can't find command root" errors. But I think that the system cron jobs _are_ successfully being run someplace because logrotate seems to be working.

So what I _think_ is happening is that /etc/crontab is being run twice: once as the system crontab, and once as my sudoed local user's crontab. When I run crontab -l I see nothing, but when I run sudo crontab -l I can see the contents of /etc/crontab. I am reluctant to delete my sudoed local user's crontab, because then in the process I would be deleting the system crontab, and I do not know how I should restore the system crontab's contents. (I am still not sure as to the most appropriate way to edit the system crontab).

How can I get out of this mess? I want /etc/crontab to go back to the way it was before--running _once_ as the system crontab. As for my new cron job, I'm willing to reconfigure it anywhere so long as I am still able to run it as root. Any ideas? (I am using Ubuntu 8.04 Server LTE)

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Software :: Scheduling Backup In Crontab When Put This File In Crontab To Schedule The Backup Program It Wont Run?

Apr 9, 2011

I have installed an application manager(monitoring application) on my linux server. Now, i need to have backup schedule for my application. The application itself has executive file to backup database.But when i put this file in my crontab to schedule the backup program it wont run!50 09 * * * root /opt/ME/AppManager9/bin/BackupMysqlDB.sh

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Fedora :: Write A Crontab Entry Using "crontab -e"

Jul 21, 2011

I was trying to write a crontab entry using "crontab -e"


Code:
0 0 * * * cp /var/log/httpd/domains/mydomain.net.log
/home/admin/logs/mydomain.net.log

crontab is giving me this error:

Code:
"/tmp/crontab.XXXXfMOnRS":2: bad minute
errors in crontab file, can't install.

I've tried a dozen different values for the minute, but it's still giving me the same error.

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General :: Crontab Can't Run / Why Is So?

Feb 1, 2010

I want to run a crontab job but it isnt working. I am writing in the crontab file with crontab -e Then I am waiting time but it isnt working. code...

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General :: Crontab: 12 3 12 4 4 Cat /etc/passwd?

Jan 5, 2010

If I configure a crontab like below.12 3 12 4 4 cat /etc/passwd I know that the cat command will get executed at the configured time. But where will the output of that command go?If it is something like below, then out put will be routed to /tmp/file1.12 3 12 4 4 cat /etc/passwd > /tmp/file1

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General :: How To Edit The Job Using Crontab

Jun 1, 2010

I setup a cron job to trigger a script that I wrote every morning at 12:00 AM, but it does not seem to be working.

This is how I edit the job using crontab -e

Why it isn't triggering at 12:00 am every night. If I run the script manually it works just fine so I know is not the script causing troubles.

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General :: How To Set Cronjob In /etc/crontab

Apr 10, 2011

I know crontab -e sets a cronjob in /var/spool/cron but how do I set a cronjob to run from /etc/crontab? Is there a command used for this or would I have to manually edit a certain file?

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General :: Set Up A Crontab So That From Machine {which Is 192.168.0.99}?

Dec 5, 2010

I want to set up a crontab so that from my machine {which is 192.168.0.99}whatever I create in a directory called "/information" {suppose some texts files}will be copied to 192.168.0.100 and 192.168.0.101's machine "/readinfo" directory at 5.30 pm. everyday."/readinfo" is directory which is accessible by all users on that machines {192.168.0.100 & 192.168.0.101}is this crontab right?30 5 * * * /bin/cp -rf /information/* 192.168.0.100:/readinfo30 5 * * * /bin/cp -rf /information/* 192.168.0.101:/readinfoI guess first these 100 and 101 machines should allow me {99} ssh connection without passowrd.

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General :: Clock Correction In GNU - Crontab?

Oct 20, 2010

My laptop's clock (Acer Extensa 5220) seems to be slow. I've corrected it 5 minutes forward last week and now have just corrected minute forward again. Is there a program [apart from time servers] to correct clock properly, for example, by shifting it a bit every hour? Is there already a program to put it to crontab or I should hack up a script? Or I should check more things?

I have found that HW clock is right, but system time is slow: about a second each 2.1 hours.
root@vi-notebook:~# dmesg | egrep 'clock|unstable'
[ 0.103785] Switching to clocksource tsc
[ 0.265274] Marking TSC unstable due to TSC halts in idle
[ 0.265514] Switching to clocksource acpi_pm
[ 1.321408] rtc_cmos 00:09: setting system clock to 2010-10-30 00:10:48 UTC (1288397448)
Is placing "hwlock --hctosys" to crontab a right thing?

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General :: Running Scripts From Crontab

Nov 1, 2010

Im new to linux, using ubuntu 10.04. I have been playing around with crontab and have no problems scheduling a job which runs a script file containing the following command:

However, when I try to do the following in the script file nothing happens..

Similarly the following doesnt do anything either:

Is there something im missing?

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General :: Commented Out Lines In Crontab Still Run?

Sep 20, 2010

Silly question here. My crontab looks like this:

Quote:
0 22 * * * /usr/sbin/logrotate /var/log/VRTSralus/VRTSralus.logrotate
#0-59/10 * * * * /root/memmon.sh >> /var/log/memmon.txt
0 8 * * 1 /root/SHC.sh
#0 21 * * * /root/scripts/ralus_restart.sh > /dev/null 2>&1

As you can see two of the lines are commented out. However, both commented out commands are still running. I get emails stating that the RALUS agent restarted (another mystery since it's supposed to go to dev null according to the line above), and I can see that the memmon script is also running daily. Am I missing a step? Some other place I should be looking? Commenting out lines in your crontab is pretty much a no-brainer, so I appear to have less than no brain as this is a mystery to me.

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General :: Crontab - Schedule Job To Run Every Minute?

Apr 14, 2010

I am setting crontab to run a script every minute irrespective of the current hour's value:

Code:

[root@localhost bin]# ls
sec.php showTime.sh
[root@localhost bin]# crontab -l
1 * * * * /root/bin/showTime.sh
[root@localhost bin]#

But it is not working. Does the line mean: "Run this script every day at hour:01"?

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General :: Crontab Shutdown Not Working?

Jan 2, 2010

I'm running Ubuntu server 8.04.3 with eBox on a Dell GX280. I want to power off my box automatically every night, so as root I added a crontab entry "05 1 * * * /sbin/shutdown -P now". The command runs on schedule but most days the PC goes into a coma instead of powering off. It doesn't respond to key presses or mouse movement or Ctrl-Alt-Delete, I have to push its power button to complete the shutdown. I have tried a variety of alternatives such as "/sbin/shutdown -h" and "runlevel 0", they all behave the same way

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General :: Remove Line From Crontab?

Aug 26, 2010

I have exactly same line like in crontab and I want to remove it via shell script. How to do it?

Example:
In crontab there are:
*/1 * * * * /home/testdir/testcron.sh >/dev/null 2>&1
line, how to remove it using shell ?

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General :: Run Crontab At Various Time Zone?

Apr 21, 2011

My server is in CDT. I want to run one script @9.30am of EST5EDT

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General :: Configuring Crontab In Rhel-5?

Oct 7, 2010

I want to schedule a crontab for shutting down the oracle application services. I created crontab -e by login as oracleuser and added time and run-part(script path to execute the cron). But i unable to execute on the schedule time. exact procedure for creating and execution of cronjobs in RHEL-5.

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General :: Use Crontab -e To Set It Up Under The Root Account?

Jul 16, 2010

I have set up my crontab and whilst Im logged in and it works (It runs my shell script), however when Im not logged in, the script does not run. Initially I set the time/date to 0 0 * * * (Midnight every day), as this did not work, I tested it with to 0 * * * * (every hour) whilst logged in and the script starts.

I use crontab -e to set it up under the root account..Im sure you dont have to be logged in for it to run?, but maybe im missing a step or just overdosing on Linux and need a holiday:-)

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General :: Setup Do Not Run In The Blank Crontab

Aug 13, 2010

I used to get the below when I ran crontab, but now its disappeared and my tasks I set up do not run in the blank crontab

#lxpr weekly cron job - Kickstart generated entry
0 1 * * 0 /opt/lxpr/lxpr -st /var/lxpr
#lxpr monthly job to clear down old dumps - Kickstart generated entry
0 1 28 * * find /var/lxpr -name "lxpr.`uname -n`*" -type d -a -mtime +30 -exec /bin/rm -r {} ;

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General :: Crontab Fail To Start?

Jun 22, 2010

I type this 10,20,30,40,50 * * * * /root/auto.pl

my log file
Jun 23 10:10:01 localhost crond[7702]: (root) CMD (/root/auto.pl)
Jun 23 10:20:01 localhost crond[12022]: (root) CMD (/root/auto.pl)
Jun 23 10:30:01 localhost crond[14610]: (root) CMD (/root/auto.pl)
Jun 23 10:40:01 localhost crond[18676]: (root) CMD (/root/auto.pl)
Jun 23 10:50:01 localhost crond[22402]: (root) CMD (/root/auto.pl)
Jun 23 11:01:01 localhost crond[29476]: (root) CMD (run-parts/etc/cron.hourly)

but my application doesnt run at all. my script is in perl language

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General :: Crontab Either No Error Doesn't Run

Feb 16, 2010

Either no error and it doesn't run (The scripts all run fine manually and in the cron.daily, cron.hourly, etc. directories.) If it does try to run it, it shows this: Feb 16 12:59:01 buddha crond[3638]: (*system*) BAD FILE MODE (/etc/crontab). Here's my crontab:

[code]...

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General :: Crontab Not Running Php Script?

Apr 18, 2011

I have a crontab that is supposed to run 2 PHP scripts but they never run.

30 */3 * * * php /var/www/html/mkimages.php
0 */3 * * * php /var/www/html/import_historic_data.php

Both of these files are owned by root, is it a permissions thing? How can I get get cron to run the files?

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General :: Crontab Not Running Script?

May 17, 2010

I put below line in a sh file

#!/bin/bash
HOSTS=172.16.14.1
COUNT=4

[code]...

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General :: Crontab Is Not Running Script

Dec 20, 2010

I'm trying to get myself familiar with bash scripting.I created a script to delete all files and folders in a specific directory, and made an entry in crontab.Crontab will not run the script, but I can run it manually.

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General :: Crontab Path When Execute Job

Apr 1, 2010

I have and entry in a crontab for my user (appadmin) that when it executes it does not start with the proper path. It needs to start as the appadmin user as appadmin owns all the directories for glassfish. However, once glassfish restarts, the hudson application cannot find the default JDK. I get an error. If I initiate the restart via command line, all works as it should. I believe it has something to do with PATH in the crontab but am not sure what I need to set the PATH to in crontab.

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General :: Crontab Script Confirmation

Nov 22, 2010

I have a quick question involving crontab and a script I want to run with it. The script generates and sends an email to group members who are on-call for a given day, but when you run it this appears'Run This Script?' The script will run when you enter 'y' or 'yes' and then press enter.

I'm trying to give that input via another script which runs the first one and then waits for the prompt to input a 'y'.How can I make a script which waits for a prompt and then gives it input?

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General :: Copy 3 Dir's Contents To 1 Dir By Crontab?

Jun 7, 2010

how to copy 3 dir's content to 1 dir by crontab?suppose i want to copy /home/ftp1/* /home/ftp2/* /home/ftp3/* to /ftpdatathree ftp user data to one folder after every one minute by crontab methodso it goes like*/1 * * * * /bin/cp -rf ??? /ftpdata

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