Hi,
I have a shell script. What should I do to allow only single instance of the script to be run by a user at a time. That is, Only one user can run that script at a given point of time.
Please help..
Its very important for my project
Thanks in advance (4 Replies)
Hi,
I have a script. I want only one instance of the script to be running at any point of the time. How can I do it.
what would be the exact format of the ps command for doing this. For example the name of my script is "Inst.sh"
Thanx in advance (2 Replies)
Hi there, if i have a simple getopts like below ...how can i make it so that if somebody enters more than one -g argument for example, it will error with a " you cannot enter more than one -g" or something like that.?
I want to only allow one instance of a -g or a -h etc ..
while getopts... (1 Reply)
Hi All,
I have searched the forum but couldn't find exactly what I need. Hopefully someone may be able to help.
I'm trying to put a script together that will extract numbers from a text file and multiply them by, for example 1.5 or 1.2
Sample file looks like this...... (1 Reply)
There are a lot of ways to extract text from between two strings, but what if those strings occur multiple times and you only want the text from the first two strings? I can't seem to find anything to work here. I'm using sed to process the text after it's extracted, so I prefer a sed answer, but... (4 Replies)
Hello,
I did offline HACMP(PowerHA) upgrade 5.4.1 to 5.5 - basically stopped HACMP services and upgraded cluster.* filesets.
Tried to start services again - topsvcs refused to start on second node complaining that node instance numbers are different - and indeed they are different.
This is... (2 Replies)
Hi All
I need help
am having a source file as below
emp
dept
class
subclass
region
country
division
first i need to get line count and i need to divide by 3 it is an parameter passing value
number of lines 7 (8 Replies)
Hi I am part of a academic organization and I want to send a fax to the students however there must be a quicker way to get the fax numbers extracted from the online forms they sent me.
The file looks like this (numbers are fake in order to protect identity):
Biochemistry Major
Michael... (3 Replies)
Hi,
I want to write one program in C in Unix OS which will check the running status of a process time to time. If the process is stopped somehow by any means, it will ensure that the process is restarted and only one copy of the process image should run in memory at any point of time for the user.... (2 Replies)
I have a csv dataset like this :
C,rs18768
G,rs13785
GA,rs1065
G,rs1801279
T,rs9274407
A,rs730012
I'm thinking of use like awk, sed to covert the dataset to this format: (if it's two character, then keep the same)
CC,rs18768
GG,rs13785
GA,rs1065
GG,rs1801279
TT,rs9274407... (7 Replies)
Discussion started by: nengcheng
7 Replies
LEARN ABOUT DEBIAN
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS -raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO ppm(5)AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)