How do you write a shell script that change the extension of all the files?
e.g
chext rtf doc
where .rtf is the original extension
and .doc is the new extension
is it something to do with basename?
do I need a for loop?
Please help!
Unix SuperNewbie (4 Replies)
Hi -
I'm stuck. I have a group of text files created using the split command. My files have the names "projectaa", "projectab", "projectac", etc. What I want to do is add the extension ".txt" to each file. I think I've got part of a sed command together, but I'm stuck on my regex - I keep getting... (9 Replies)
Hi
I am writing a script which does an FTP of a set of files onto another machine and then would have to rename the files into a different extension on the source machine.
for example if the file being sent via FTP is sample.txt. Once the file has been transferred i would want to modify the... (2 Replies)
Hi,
I want to write a script to read all the filenames with extension .xml in a directory and pass the name of the file, one by one, to another function.
Please help me out.
Regards.
Saurabh (3 Replies)
Hi there,
I'm pretty new to UNIX and have tried trawling through this forum to find an answer to what I want to try to do, which I'm sure is very simple but I don't know how to do it.
What I have a a folder that contains multiple files that I have copied from Windows and I want to remove the... (5 Replies)
I have a directory of files and each file has a random 5 digit string at the beginning that needs to be removed. Plus, there are some files that will be identically named after the 5 digit string is removed and I want those eliminated or moved.
any ideas? (17 Replies)
Hi I have abc_ahb_one.v
abc_ahb_two.v
abc_ahb_three.v
........l
like this
-----upto
abc_ahb_ninety.v in some directory.
I need to change those file names to like below.
... (5 Replies)
Hi, all:
I'd love to use shell script to change all filenames under different folders once for all:
I've got over 100 folders, in each of them, there is a file named "a.ppm". I wanna change all these "a.ppm" to "b.ppm", and still . Visually, the directory structure looks like:
and hope... (1 Reply)
hi,
i have a directory which contains some files and a subdirectory. i am writing only the files names to a file using the below code.
ls -ltr | grep "^-" | awk '{print $NF}' > /home/file_list$$
cat /home/file_list$$
s1_abc.txt
s2_def.xls
s3_def.xls
as you can see there is one .txt... (7 Replies)
Hello,
I made a mistake in a script and now need to go back and change allot of filenames. I need to change "v4" in filenames to "v3". I was thinking of something like this.
#!/bin/bash
FILELIST=$(ls -f -R *)
for FILE in $FILELIST
do
# create new filename
... (5 Replies)
Discussion started by: LMHmedchem
5 Replies
LEARN ABOUT SUNOS
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)AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
27 July 1990 ppmquantall(1)
02-06-2012
