The best thing I can recommend would be to use full path names in the script to other jobs you are calling.
Also, cron normally changes directory to your home directory - this of course depends on your version/release of cron. So even if you execute the $HOME/cronscripts/tmp.job script, it will execute as if you were sitting in your home directory and typed cronscripts/tmp.job
Another quick hint that has made it easier when building scripts that call other executables:
If you have a bunch of files in similar or the same directory, use variables:
It just seems to keep it simpler, plus, if you ever have to move your script, they're easier to "fix".
Please can someone help me. I need to set up a cron job to measure CPU usage, Disk I/O and memory usage over a period of 1 minute along with the number of users logged into the system. I also need to send it to another user besides myself every hour. Please can someone help me! Thanks. (4 Replies)
Dear Guru,
I have submitted some cronjobs that has been running for quite sometimes. However, today I counter some cronjob did not run. Can you please explain what causes this to happen. Any system setting that limit number of cronjob per minutes to be started, etc?
Thanks.
Kelly (1 Reply)
hi
iam new at unix.iam running a cronjob,which i want to run on the first day of every month at 1AM.this is what i have specified:
00 01 1 * *
is this corect? (1 Reply)
Hi,
I want to schedule a script on daily basis in morning 8:00 A.M and 5:00 P.M , how can i achieve this, i want the parameter
0 ? * * *
what will be the second parameter in my case.
Regards (1 Reply)
hi everyone I'm newbie in this forum hope I can get some help here :)
I have a command in crontab that executed every 1 minute
sometime this command need more than 1 minute to finish
the problem is, the crontab execute this command although it's not finish processing yet and causing the system... (7 Replies)
Hi I am very new to linux. I want to run a cronjob every 15 minutes that checks a directory for files. If the directory contains more than ten files I want it to send an email to me.
All I have is this...
*/15 * * * * ls -l | wc -l | | mail -s "This is just a test"
I would... (2 Replies)
Dear all,
I wrote a script and set it as a cron job to automatically download the data from the website.
Here is the problem, when I run this script in terminal, it works well, while it can not download the files when I run it as a cron job, I feel so weird.
The script as follows:... (28 Replies)
I'm running a few cronjobs under a differnt user name that basically do the same thing:
/usr/bin/find /home/userid/userid/archives -mtime +30 -type f -exec /usr/bin/gzip -1vN {} \\\; ; /usr/bin/mv /home/userid/userid/archives/*.gz /msgs/archive_msgs >/dev/null 2>&1
Seems to be working except... (12 Replies)
How to set cronjob for 48 hours.
I can set for 2 days as shown below.
* * */2 * *
It is creating confusion for 30 days & 31 days per month. (3 Replies)
Discussion started by: Nishit
3 Replies
LEARN ABOUT REDHAT
ppmquantall
ppmquantall(1) General Commands Manual ppmquantall(1)NAME
ppmquantall - run ppmquant on a bunch of files all at once, so they share a common colormap
SYNOPSIS
ppmquantall [-ext extension] ncolors ppmfile ...
DESCRIPTION
Takes a bunch of portable pixmap as input. Chooses ncolors colors to best represent all of the images, maps the existing colors to the new
ones, and overwrites the input files with the new quantized versions.
If you don't want to overwrite your input files, use the -ext option. The output files are then named the same as the input files, plus a
period and the extension text you specify.
Verbose explanation: Let's say you've got a dozen pixmaps that you want to display on the screen all at the same time. Your screen can
only display 256 different colors, but the pixmaps have a total of a thousand or so different colors. For a single pixmap you solve this
problem with ppmquant; this script solves it for multiple pixmaps. All it does is concatenate them together into one big pixmap, run
ppmquant on that, and then split it up into little pixmaps again.
(Note that another way to solve this problem is to pre-select a set of colors and then use ppmquant's -map option to separately quantize
each pixmap to that set.)
SEE ALSO ppmquant(1), ppm(5)BUGS
It's a csh script. Csh scripts are not portable to System V. Scripts in general are not portable to non-Unix environments.
AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
27 July 1990 ppmquantall(1)