I'm not familiar with this grep usage, I probably miss something, your command executed as you posted :
Code:
grep -- -v $string
grep: -8x7YTVNk2KiuY-PWG5zzzjB-zzw: No such file or directory
gives me this error. My problem is that the variable $string has content that begins with "-" . the variable $text can very well be a file with lot of content. my problem is variable $string
Hi,
variable1="This is a car"
Now I want to replace the content of variable1, "car" to "dog". Is there any simple command I can use.
Thanks.
Joseph (4 Replies)
I got a sample BASH script like this :
$ cat test
MYVAR=$1
DUMMY1="This is tricky"
DUMMY2=24
echo $
$ ./test DUMMY1
./test: line 5: This is tricky: syntax error in expression (error token is "is tricky")
**I was expecting the output as "This is tricky", ah! but no luck
**But... (2 Replies)
I have a variable that contains filenames like this:
variable="file_1.extension<blank>file_2.extension<blank>file_3.extension<blank>file_4.extension and so on"
How can I make filenames to be separated by newline: (I tried Sed but it didn't worked well)
file_1.extension
file_2.extension... (6 Replies)
Hi all,
I have a file which will be updated every half an hour and time stamp will be printed in the beginning of the updation. i just want to grep the content between every hoalf an hour.
Pls help me on this issue. how to grep contents between tim stamp?
Ex of file:
29/09/2010... (20 Replies)
I need to know if is possible to use grep to check content of a local variable, for eg. i use read index and i want to check if the index i read is in correct form, how do i do that i tried with grep but i get errors all the time dont know how to make it work.. thanks! (3 Replies)
Hello all,
I do have a variable containing one line like this:
Waiting for job XXXXXX to start
I needed to get the 'XXXXXX' literal, so I did the following:
job_interno=`echo $log_exec | sed 's/.*Waiting for job \(*\).*/\1/' `
#other stuff
Now, my variable is have more... (5 Replies)
Tricky one:
I want to do several things all at once to blow away a directory (rm -rf <dir>)
1) I want to find all files recursively that have a specific file extension (.ver) for example.
2) Then in that file, I want to grep for an expression ( "sp2" ) for example.
3) Then I want to... (1 Reply)
1) Is it possible to get tags content by grep -E ? For example title. Source text "<title>My page<title>"; to print "My page".
2) which bash utility to use when I want to use regex in this format?
(?<=title>).*(?=</title) (11 Replies)
I have some large login files that I need to extract (user)@(server) from. Where it gets tricky is that there is usually more than one '@' sign on each line(although it does have a leading space if it's not part of the (user)@(server) string), I need only the (user)@(server) section, I need only... (6 Replies)
hi i just cant figure out how can i do this ls -lt > log.txt using $PWD
what i mean is how can i get the ls command content into a file using $PWD variable? :confused: (4 Replies)
Discussion started by: chinababy
4 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)
12-08-2011
