General :: Do Scheduling Using /etc/crontab File?

Feb 11, 2011

i want to do scheduling using /etc/crontab file instead of using crontab -e that is crontab command on the terminal.i am appending to the crontab file in the /etc directory but the scheduling is not happening

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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/

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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/ > $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 :: Purpose Of /etc/crontab File?

Jun 7, 2010

I attempted to run various cron jobs as root - just general server make-tidy stuff. But if I edit the /etc/crontab file directly, these tasks don't get run. However, if I use crontab -e as root, these jobs appear to work. Any idea why this might be the case? Also, I understand that user cron jobs are stored in /var/spool/cron/<user> (including root). If this is the case, what's the purpose of the /etc/crontab file?

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General :: Create A Crontab That Renames A File?

Oct 8, 2010

I've tried to create a crontab that renames a fil extension every minute. This is what I've tried:*/1 * * * * / rename /home/bodil/Avräkningsfiler/'s/.txt/dat/' *.txtBut it doesn't seem to work.I've also tried to create a .sh file in the catalog itself with the command executing directly in the catalog but even though running the command by typing it in, it doesn't run automatically by cron

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General :: E-Mailing Whole Output Of A File With Crontab

May 3, 2011

I have this code that is 'bashed' regularly with crontab and basically it will send me an E-Mail of most of the output but it misses out some of it!

Here is the crontab code to automatically run the script:


So that sends me an E-mail with most of the output of the following code:


It sends me everything up to echo "*******" "Begin compressing and transferring files" "*******" but it wont output the tar bit.. so it should give me a list of files that have been tarred.

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General :: Cron / Crontab - Do Not Edit This File

Mar 19, 2011

I am trying to have the files from /user/directory copy every hour to /backup/user/directory. It would seem that cron or crontab is what I need to use. Looking at previous posts and other documentation only shows how much I don't know. When I type crontab -e I get a blank file I can type into, seemingly using vi as the editor. I have no problem with that but when I type cron -l, I get my text after a message about "Do Not Edit this File". What I am reading just makes no sense, I am not understanding even the most fundamental aspects of cron or crontab. Where I can get the most basic of basic instructions to try to understand this function?

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General :: Script File Fails When Run From Crontab / Sort It?

Dec 29, 2010

Is been a while since I was last here requesting help. Now I need some of that LQ magic. I have a script file that extracts data for a date range, create a zip file for the data and then ftp it to a remote server.
Now the script is working perfectly if it is run manually, but now I want it to execute automatically. So I use the crontab, but for some reason the script fails when run from the crontab.code...

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General :: Unable To Find Directory Listed In /etc/crontab File?

Feb 10, 2011

when a script in /etc/cron.d directory will be executed?. I know that scripts in cron.daily will be executed daily [ set in /etc/crontab file]? Cant able to find this directory listed in /etc/crontab file?

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General :: Cron Job Not Scheduling?

Jan 9, 2011

I have a cron job to schedule the task on the third sunday of the month.I saw the previous threads but didn't find any solution.

How the cron syntax can be written.

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General :: Earliest Deadline First Scheduling?

May 28, 2009

kindly give me example of earliest deadline first scheduling?

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General :: Kernel Scheduling Algorithm

Sep 8, 2010

is linux kernel is priority preemptive kernel?if it is. where it is using round robin scheduling algorithm?when processes are scheduled for the processor process will be allocated as which sechudling alogorithm?

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General :: Scheduling Script Using /etc/cron.d?

Mar 10, 2011

iam try to schedule my job in a file made in /etc/cron.d file as follows* * * * * tomcat6 /home/etika/Desktop/ /home/etika/Desktop/ea/etika.txt abc@gmail.comwhere belongs to etika which is the root and etika.txt belong to tomcat6 this command is not running iam confused about the name of the owner written after the *'s please tell me whose name is written after the *'s(the schedule of the script) the owner of the script or the owner of the file which iam passing as an argument to the shell script

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Ubuntu :: How To Run .sh File Using Crontab

Aug 4, 2010

I have a .sh file which i want to run using crontab at a specific time with root privilege.

I put an entry in root's crontab as the following:

sh /home/vivek/ifconfig/

But, the file do not get executed at a given time.

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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 :: CGROUPs And Fair Group Scheduling?

Apr 23, 2010

I have played around a little bit with CGROUPS and the fair group scheduler ( using kernel version 2.6.31). When you have CGROUPS in a flat structure, with only one layer from the root-cgroup, everything works as you might expect when setting the cpu.shares parameter, i.e. a fraction of the total. But when I experimented with having deeper levels of CGROUPs it did'nt make any sense sometimes. For example, I had one CGROUP with the maximum number of shares (260000 something) , and two childgroups with quite little shares, 5000. Then I created some cpuhogging processes ( while(1); ) and put most of them in childgroups and one in the parentgroup. The logical thing would be if the parentgroups single process took almost all CPU-time, as it had the maximum number of shares, but instead the processes in the childgroups got the most CPU-time.

I have tried to figure out how it works by looking at the source code, but I can't really understand it. How does the hierarchical structure of the cgroup-tree interact with the flat aspect of it, i.e. siblings? Or do I misunderstand the whole concept?

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General :: Modify Kernel With Non-Preemptive Scheduling

May 1, 2010

How to modify kernel to non-preemptive process scheduling only. Suggest any site that provides this kind of source code.

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General :: Write A Scheduling Script In Java?

Mar 2, 2011

am newbie and i have problem to write a scheduling script in java, this script should do something in certain time interval... Could anybody help me, maybe give some example or source that maybe useful

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General :: Kernel With Non-preemptive Process Scheduling?

May 1, 2010

how to modify kernel source to make its process scheduling to non-preemptive and FCFS ?

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General :: Scheduling Shutdown After Download Completion?

May 20, 2010

Is there any way to schedule shutdown, from terminal,right after some currently running download in mozilla completes??

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Ubuntu :: Can't Create A New File Using Crontab

Apr 15, 2010

A couple days ago I noticed cron stopped working and now I can't create a new file using crontab -e. When I hit crontab -e I get the editor but after saving nothing comes up under crontab -l and the file is blank when I reopen it. I don't have a cron.allow or a cron.deny.

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Red Hat / Fedora :: Get Mail From The Crontab Log File?

May 6, 2010

I want to get mail from the crontab log file....

How to set log file in crontab and the second and how can i get mail from the crontablog file.

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General :: Scheduling Product That Is Available To Handle The Production Code?

Oct 12, 2010

I am proposing moving from the mainframe to Linux. Problem is that I am not aware of a scheduling product that is available to handle the production code. Currently using CA7. Is there anything out there that accomplishes the same thing? As you can tell, I am NEW to Linux!

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Fedora :: Crontab To Set A File Playing At A Certain Time?

Jun 6, 2010

I used crontab to set a file playing at a certain time, this works fine; however I want this to run even if no-one is logged in (but the computer is on). I can't get it to do this

Line is: 30 06 * * * env DISPLAY=:0.0 /usr/bin/totem /home/adunaic/Playlist.pls

Okay I think the problem was with needing a GUI.

Using this instead works, but i only hear the sound when I log in. I think something needs to be doen to start the audio perhaps?

14 17 * * * export DISPLAY=:0.0 && /usr/bin/mpg123 /home/adunaic/alarm.mp3

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Ubuntu :: Adding Text To A File From Crontab?

Jul 14, 2010

I want to append a text string onto an existing file from crontab. These do not work:

0 1 * * * cp "test" >> /home/xys/myfile.txt
0 1 * * * mv "test" >> /home/xys/myfile.txt
0 1 * * * cp 'test' >> /home/xys/myfile.txt
0 1 * * * mv 'test' >> /home/nys/myfile.txt

How can this be done?

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Ubuntu :: Run Rsnapshot From Cron Via Root's Crontab File

Nov 21, 2010

I am trying to run rsnapshot from cron via root's crontab file (crontab -e). If I run rsnapshot from the command line with sudo it works perfectly, however, if I run it from cron:

* * * * * /usr/bin/rsnapshot hourly >/tmp/crontab.out 2>/tmp/crontab.err
This does not work. The crontab.err file shows:


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Server :: Stop Squid Before Executing Crontab File?

Mar 14, 2011

I am using squid 2.6 on my cent os 5 .I want to shutdown the system at 7:00 pm for that purpose I write in# crontab -e 0 19 * * * /sbin/shutdown -h nowThe thing which I want to clear that when the system will going to turn off it will also stop squid service? If not then how can I automatically stop squid service and then crontab file execute

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General :: When Type "crontab -e" To Edit The File, It Is Not Opening In The Editor & Showing Output As "285"?

Aug 8, 2011

when I type "crontab -e" to edit the file, it is not opening in the editor & showing output as "285". I just wanted to edit crontab, So could anybody please tell me which is the real file of crontab, so I can manually edit that file using vi editor or nano. Or if that default editor is corrupted when I type "crontab -e", how can I change default editor before using "crontab -e" command. I will be waiting for your kind reply

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Ubuntu Servers :: Crontab Or Other (script) To Automatically Replace File?

May 18, 2011

I have been searching for a few hours now trying to figure out the best way to have Ubuntu Server 8.10 copy and replace a file every week.

So for example:

File A (original file)
File B (replacement file)

I would want to copy File B from its location and replace File A each week automatically with out removing or destroying File B.

I've thought of doing a cron since I already have a job set for email piping. but I'm unsure of the best way to complete this task.

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