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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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
View 3 Replies View Relatedwhat is the purpose of using hard links instead of being a shortcut to some file ?
View 5 Replies View RelatedI 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
View 1 Replies View Relatedis 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
View 4 Replies View Relatedi 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
View 7 Replies View RelatedI'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
View 10 Replies View RelatedI 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:
Code:
So that sends me an E-mail with most of the output of the following code:
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.
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?
View 4 Replies View RelatedIs 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...
we can save the users password in /etc/password file itself.then why a special file /etc/shadow is created to save the encripted password of users.
View 2 Replies View Relatedwhen 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?
View 2 Replies View RelatedOn a production Centos 5.3 system, I want to raise the hard & soft limits of open file handles from 1024 -> 8192 (not a "biggie", I'd think) Right now, "sysctl -a | grep file" shows fs.file-max=463144 (a default, I'd guess) I'm guessing file-max is the maximum number of open file handles on the system, vs the per-user limits seen with "ulimit -Hn" and "ulimit -Sn". Right? If so, I shouldn't think I'd have to touch this on a server with few users.
Also, after doing a lot of reading, I still don't understand the mentions of needing to also add: "session required pam_limits.so" to /etc/pam.d/loginor adding "session required /lib/security/$ISA/pam_limits.so" to /etc/pam.d/system-auth Maybe I've gotten off into the deep weeds in goggling about raising file handle limits.
can anybody tell the use of make file in Nis server.
View 1 Replies View RelatedWhat is the purpose of bash scripting? Is it just for file manipulation?
View 4 Replies View RelatedI've always been confused about this issue of boot partitions. In the past when I install linux I usually have 2-3 partitions.
1. Main OS partition mounted on /
2. Storage partition mounted on /home
3. Swap partition
Why and when would I need to have a boot partition? Even if I dual boot two OSs, I just make one more partition for that other OS. So what's the purpose of a boot partition?
Can you explain me what is purpose of shebang in scripts? I have noticed that my scripts will run without shebang. i.e. When i save my crontab file it says that scripts will be executed in i.e. /bin/sh shell. So, what is the point if I put #!/bin/ksh at the start of script?
View 8 Replies View RelatedI have a folder that may contain text documents, pictures, MP3s, video clips, all sorts of stuff. Supposing that, within reason, I'm not too bothered how long it takes to compress and uncompress them. And suppose I don't care if it's free or open source (well, has to be free as in beer). What's the best compression format/algorithm (whatever it is that I install in Synaptic and choose from the drop down menu in the compression tool) I should use?
View 9 Replies View RelatedThe last time I wrote code for anything was about 15 years ago using Turbo Pascal. I would like to get back into it, most likely to create some mobile apps or enhance web sites. What is the best general purpose language to learn? And what is a good method for learning, preferably free?
View 1 Replies View RelatedI want to create a general switch that I can use to send a signal to my ubuntu server when it is activated/deactivated. Here's an example: I want to know when a certain door is open, so I can have a switch closed when the door is closed and opened when the door is opened. When opened or closed, the computer will receive a signal and I can have some software intercept this signal and process it to my liking (i.e. ring a bell/text message me/email me/etc).
I know I will have to create a simple driver, software to make use of this signal, etc... I am willing to do whatever it takes to make it happen. I'm just wondering if anyone can point me in the right direction as far as which interface I should use to communicate with my server (i.e. usb, serial), which references I should read, and any personal experience you have with something like this...
What is the purpose of libc in an operating system?
Is the libc is common for all OS or it is different for different OS!?
I mean source of libc build for RH is same for Ubuntu !?
I have been trying out in learning with logrotate command and logrotate configuration file )logrotate.conf custom logfile for an process is 'test.log'
Code:
#cat /etc/logrotate.d/test
/var/log/test.log {
rotate 4
[code]....
whenever the log file (test.log) exceeds 100M a new file will be created with the file name as test.'date'.'gz'(new file is created with a current date and in a compressed format of gz) and also with permission mentioned above). I really dont know what is the role of rotate( will this be carried on only for next 4times i mean upto 400MB; (4times*file reaches 100MB)? and also what could be the purpose of postrotate?
I'm confuse about different beetwen console and terminal in linux system? And what purpose them for?
View 5 Replies View RelatedI 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/college.sh
But, the file do not get executed at a given time.
What is the difference between the crontab located in /etc/crontab and the crontab that can be edited using crontab -e?
View 2 Replies View RelatedWhat good does getting into single user mode do?And what's the basic purpose of it , i.e is it maintaining purpose???
View 2 Replies View Related"Life has been made easier with all Microsoft systems, all versions of Dos and Windows, because each of them has to be installed in an active primary partition and so hence will always has a boot loader in the root partition." So if I already have Windows 7 installed (in a 100gig partition of a 1t hdd) how do I modify the windows booting process so that I can go on to create many additional partitions that will be used for linux distros?
View 7 Replies View RelatedA 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.
View 4 Replies View RelatedI 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.
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
