10-19-2001
PS
One more important thing about cron: it has no ENV set.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
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)
Discussion started by: gerwhelan
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2. HP-UX
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?
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Kelly (1 Reply)
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3. UNIX for Dummies Questions & Answers
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)
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4. Solaris
HI,
What is the differnece between at / con job? thanks in advance. (1 Reply)
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5. AIX
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.
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6. UNIX for Dummies Questions & Answers
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)
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7. UNIX for Dummies Questions & Answers
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...
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Dear all,
I wrote a script and set it as a cron job to automatically download the data from the website.
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I'm running a few cronjobs under a differnt user name that basically do the same thing:
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How to set cronjob for 48 hours.
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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)