I would like to have a script that would change my current working directory. However, any time I execute a 'cd' command in a script, it holds only for the life of that script -- the working directory on exit is the same as when the script was initiated. Is it possible to have the script return... (3 Replies)
:confused:
Hi All,
This script is not working. I want to change the directory as per users selection in current shell. Looks like it is spawning sub-shell internally.
I have used
. changedir.sh
source changedir.sh
./changedire.sh
But did not work. Currently shell directory remain the... (4 Replies)
Hi,
I'm struggling to write a script to do the following,
-will go through each line in the file
-in a specific character positions, changes
the value to a new value
-These character positions are fixed througout the file
-----------------------
e.g.: file1.sh will have the following 3... (4 Replies)
Hi,
I am trying to change the directory in my script, & want to check if the directory is present or not .
Ex:
cd /home/xyz/temp/logs
if the logs directory is not present i want to show the error in script instead of shell script error.
Can anybody please help me on the same
Thx in... (2 Replies)
HI,
I need to change the working directory by using the shell script
/Export/home/user_name
I have to go one step back like
/Export/home
Please help on this.:confused: (3 Replies)
Hi All,
I am using the awk command to replace ',' by '\t' (tabs) in a csv file. I would like to apply this to all .csv files in a directory and create .txt files with the tabs.
How would I do this in a script?
I have the following script called "csvtabs":
awk 'BEGIN {
FS... (4 Replies)
Hello,
I must change files and dirs name which contains che "?" char, I try this:
rename 's/?/-/' *.*
nothing, what's the problem?
thanks (14 Replies)
Discussion started by: ionral
14 Replies
LEARN ABOUT V7
ppmtopgm
ppmtopgm(1) General Commands Manual ppmtopgm(1)NAME
ppmtopgm - convert a portable pixmap into a portable graymap
SYNOPSIS
ppmtopgm [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original
image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b.
Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can
read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting
color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original
colors, not necessarily a way that looks like a black and white photograph.
QUOTE
Cold-hearted orb that rules the night
Removes the colors from our sight
Red is gray, and yellow white
But we decide which is right
And which is a quantization error.
SEE ALSO pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
10 April 2000 ppmtopgm(1)