compressed file Post: 302506040

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Import data from compressed file

HI I need to import data from a file which is in comressed format but system doesn't have enough space to uncompress file Is there any way so that i can do import from compressed file.

2. Shell Programming and Scripting

Check if file compressed or not

Is there a way I can check if a file is comppressed or not? (Be it tar/gzip or compress). trying to write a generic housekeeping scrit that will delete files over 6 months old and compress any uncompressed files if less than 6 months old. But not sure if there is a clever way to check except for...

3. UNIX for Advanced & Expert Users

How to search for text within compressed file

I was wondering if there's a way to search within a file that's been compressed. i.e. if file a is inside file a.zip or a.gz, is there a a command that will retrieve the string of data I'm looking for in file a, and list which compressed file it found it in? Please help! Thanks.

4. UNIX for Advanced & Expert Users

Is it possible to see the content of the compressed file?

How we can view the content of the file,if it compressed (or) Zipped ,without uncompress ? I have one file ,i compressed it,without uncompressing the file.Is it possible to see the content of the file?

5. Shell Programming and Scripting

check to see if a file is compressed before trying to compress

I simply need to compress all files in a directory that are not already compressed and that are older than 10 days? I have this so far. I need to add to this so I don't try and compress file that are already compressed. Or if you think this can be simplified let me know. Thx. find...

6. UNIX for Dummies Questions & Answers

compressed file

I compressed a file by using gzip command gzip <<xx>> filename changed to xx.gz How to view this xx.gz file. Any idea. Thanks in advance.

7. Shell Programming and Scripting

Process a compressed file

Hi i have a filename.tar.bz2 and i have to parse it with a tool that doesn't support compressed files. I have to do it for many big files, so i can't decompress and then process. I'd like to do something like: tar -jxvf namefile.tar.bz2 | parsing_tool i mean analyze it directly,...

8. UNIX for Dummies Questions & Answers

compressed and tar file integrity

How can I ensure the folder that I tar and compress is good to be archive in DVD or tape? Must I uncompress and untar the file, or there is any way to tell the integerity of the compressed file before send to archive? I have bad experience on this, which the archive compressed file cold not be...

9. UNIX for Dummies Questions & Answers

Size of compressed file

Hi All, Is there is any way to find the size of compressed file without doing decompression. The size should give the original uncompressed data size Thanks Arun

10. UNIX for Dummies Questions & Answers

Zgrep output to another compressed file

Hi, I have a big (~15G) compressed file having around 170M records and I need to exclude around 4k bad records (\n in the string) . The typical steps would have been 1. zgrep required records into new file zgrep big15GFile.dat.gz > newBig64GFile.dat 2. zip back new file gzip...

LEARN ABOUT OSF1

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)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Import data from compressed file

Discussion started by: ap_gore79

2. Shell Programming and Scripting

Check if file compressed or not

Discussion started by: badg3r

3. UNIX for Advanced & Expert Users

How to search for text within compressed file

Discussion started by: HLee1981

4. UNIX for Advanced & Expert Users

Is it possible to see the content of the compressed file?

Discussion started by: bobprabhu