I am trying to extract a file using tar. I cd'ed to the directory I wanted to start in. I had the tar file in the same directory. I executed tar xvf filename . It appeared that it was extracting into the directory the tar file was created from instead of into the directory I was in. How do I... (1 Reply)
Hi,
Does anyone knows the command syntax for the following Unix commands:
at
mount
The OS is the Chorus/Mix 4.3 BSD Unix.
The "at" command does the following: at a precise date and hour it executes a desirede command.
Many thanks !!!
Regards, Pedro Pereira (3 Replies)
Here's my situation. I am trying to move all files from one directory to another. I have the following requirements:
1) Move all files in /myfiles/wip matching pattern "*.tif" to /work/in that are at least 10 minutes old (or older).
2) When the files are moved, they need to be moved into... (2 Replies)
Hi there.
I spent too much time away from Unix, now I can't remember how to issue a simple until command in ksh :mad:
could you tell me what is wrong with the following code sample:
export v = "1"
until
do
echo 'executing repeat_until'
v = `expr $v + 1`
done
I've... (3 Replies)
Can anyone tell me what the syntax is for the bind command in bash? I'm using OS X and the book i have ias written in 2005 ('Learning the bash shell') I'm guessing it was for an earlier version. It says something about single and double quotes, but I'm not sure exactly in what order they're... (2 Replies)
hi All,
how can i make my own commamnds for unix shell scripts.
lets xmple..
1-i want to use "down arrow key" for previous runned unix commands.
then how to acheive it.
2-Generally TAB --- complete filename or command up to the point of uniqueness ..but here its not working ..
I m new to... (1 Reply)
Hi all,
I want to add a shortcut "xmll" to my .cshrc file. By using "xmll" I want the following command to be executed:
find . -type f -name 'T*.xml' > xml_list.txt
BUT:
alias xmll 'find . -type f -name 'T*.xml' > xml_list.txt'
doesn't work.
What is the correct syntax?
Thank... (7 Replies)
Hey gang,
I'm confused about the 'exec' command. I get the basics. I can redirect stdout and stderr to one log file with:
exec >> $logFile 2>&1
However, that code requires admin rights. In other scripts, when faced with this, I'll call 'sudo' and then pass a hashed password like this:
... (8 Replies)
Discussion started by: hungryd
8 Replies
LEARN ABOUT LINUX
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)