Also, I would suggest that you use double quotes around your variable references or (part of) the script will fail if there are funny file names with spaces in them for example:
Some further things to consider that are more related to the method used in the script:
there is not return code checking of the above operation so if part of it fails then we end up with a backup where not all files are being copied, but if in the second part those files that have been copied
some files and some dirs in the backup dir now have a .bac extension and most do not.
the backup dir itself is part of the backup, it should be part of a different tree,
the cp command does not preserve access rights
I think it is better to use tar, cpio, rsync etc.. so that special files are copied as they are.
why /home/yannick/* instead of /home/yannick? For one the hidden directories and files will not be part of the copy operation. Also it is a messier process IMO.
What is the function of a double copy? Suppose you stop in mid air. Then the script will still redo the whole operation. Also the script will fail since it cannot create the .bac files and directories an/or there will be .bac.bac files
If you ever need to do a restore then files and directories that were deleted long time ago in the original directory will suddenly resurface..
I'm sitting here late at night, reading linux from scratch, and I come to this part:
http://lfs.osuosl.org/lfs/view/stable/chapter06/creatingdirs.html
my question to you, the all knowing unix.com'ers is this: what's the difference between using the install command as they do, and using the... (1 Reply)
Hi,
I look for a script to create 150 directories :
d000
d001
d002
...
...
d149
would you help me please ?
I think it would be
for i
mkdir d$i
Many thanks.
PS :
#uname -a
AIX fserver 3 5 0050691A4C00 (2 Replies)
Is there ant way to increase max number of folders in the directory from the 32766:
Problem UFS:
shell>mkdir mmm
mkdir: mmm: Too many links
But there are no links, just folders.
shell>ls | wc -l
32766 (3 Replies)
Hi, please help me with this small script
#!/bin/sh
curdir=`pwd`
n20=$curdir'/n20/'
msat=$curdir'/n20/msat/'
if
then
mkdir $n20
fi
if
then
mkdir $msat
fi
for a in 30 40 50 60 70 80
do (4 Replies)
Hi all, i am new to Linux and need some help.
I used the command: mkdir super
Directory super is created
When i try to change to this directory using: cd /super
I get: bash: cd: /super: No such file or directory
when i use: rm super
I get: rm: cannot remove 'super': Is a directory
What... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Do the procedure, which if there are 5 parameters then it creates 4 directories with names of 4 parameters, in... (2 Replies)
Howdy,
Puttering around in unix, and read this in the mkdir man page:
"The mkdir utility creates the directories named as operands..."
What does this mean, i.e. as operands?
Many thanks,
DN (2 Replies)
Hi, I used "mkdir job{0001..10}" do get directories. Now I want to create directories with a variable, for exemple "mkdir job{0001..$a}". When a=5 I get the directory "job{0001..5}". What have i to change to get job0001,...,job0005 :/
Thx for ur help :) (1 Reply)
hi linux expert
what is a difference between:
mkdir test and mkdir ./test
and also
if ( -e /test ) then and if ( -e ./test ) then
thanks in advance
Please use icode or code tags next time for your code and data (1 Reply)
Discussion started by: abdossamad2003a
1 Replies
LEARN ABOUT REDHAT
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)