01-08-2012
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am writting a daemon in python which should start at system start up with all inet.d services
on an NIS server. Then it should listen to any user login and then start a new process for that user on his login which will continue throughout his entire session.
Can anyone give any help or any... (1 Reply)
Discussion started by: thinkgeek
1 Replies
2. UNIX for Dummies Questions & Answers
Hello everyone, traditionally a user can log in on more than one machine as much as they want. In AIX 4.3, Is there a way to make it so that if the user is already logged on, the system will not let them log on, therefor not run their logon profile script again? (limit the user to one machine at a... (1 Reply)
Discussion started by: raidzero
1 Replies
3. Solaris
I want to apply patches in multiuser mode but stop logins of other users while I do it?
What is the best way to do this?
I will be connected to the system via a putty session over a serial cable from another system (console is messed up)...
Should I put in a dummy passwd and shadow file... (7 Replies)
Discussion started by: NewSolarisAdmin
7 Replies
4. AIX
I want to know how I can turn off and turn on login logging. We have a server that appears to have stopped logging user logins. Running the who command shows nothing and the last command shows no logins for a month. The var/adm/wtmp file isn't full and there is plenty of space in the var file... (2 Replies)
Discussion started by: daveisme
2 Replies
5. Solaris
Is the below logins are needed in the machine.....
nuucp , uucp ,smmsp , svctag , listen , webservd , ip ( We are not using printers),
Can you help in these?
Regards,
kumar (3 Replies)
Discussion started by: rajeshkumarvg
3 Replies
6. UNIX for Advanced & Expert Users
in a multi user system of 3 users X,Y,Z, if i know that X is presently online, is it possible to determine for how long has he been online? i mean the time duration (3 Replies)
Discussion started by: arindamlive
3 Replies
7. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
List the last 3 times you logged into the hottub and the command(s) you used to obtain this information
2.... (12 Replies)
Discussion started by: iw2198
12 Replies
8. Red Hat
Hi team,
I tried to modify the /etc/security/limits.conf file to limit the root user for more one login. I added the line in limits.conf file like:
@root hard maxlogins 1
I also tried to modify /etc/ssh/sshd_config to limit the root userlogin by adding this:
... (10 Replies)
Discussion started by: leo_ultra_leo
10 Replies
9. Solaris
Ok got a strange one here. None of my user accounts are able to login into the system. When trying to ssh to the server i get the following.
Could not chdir to home directory /home/<homedir>: Permission denied
/bin/sh: Permission denied
I checked the permissions on the home directory and even... (7 Replies)
Discussion started by: JoeDirte
7 Replies
10. UNIX for Beginners Questions & Answers
Hi folks,
I am fairly a beginner when it comes to Solaris OS administration, but part of my job somehow has scope to provide L1-level of OS administration over a few solaris servers.
Now, we have a requirement to limit the number of simultaneous ssh logins/sessions to the server, sort of... (0 Replies)
Discussion started by: engrcha
0 Replies
LEARN ABOUT LINUX
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)