Extract a column from ps -aux command Post: 302830631

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PS -aux and PS

I am new to the Unix. Can someone tell me what is the difference between 'PS' command and 'PS -aux"? Isn't 'PS' mean the current running process? Isn't 'PS -aux' mean the current running process too? If they are the same, how come 'PS -aux' always has a lot more listing than 'PS'? Thanks,

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ps aux|grep getty

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for each different entry in column 1 extract maximum values from column 2 in unix/awk

Hello, I have 2 columns (1st column has multiple entries but the corresponding values in the column 2 may be the same or different.) however I want to extract unique values for each entry in column 1 by assigning the max value from column 2 SDF4 -0.211654 SDF4 0.978068 ...

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Need to extract data from Column having variable length column

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Hi again, well does anyone knows how can i grep a process that right know the only part of the process name that i know is "backup" then renice it if the cpu consumption is more then 90% ... for now i have : a=$(ps aux | grep -c backup ) while $a > 2 #pseudo code do if ; then #...

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Get extract and replace column with link in a column where it exists

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How to find the exact process using ps aux command?

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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. UNIX for Dummies Questions & Answers

PS -aux and PS

Discussion started by: a2715mt

2. UNIX for Dummies Questions & Answers

ps aux|grep getty

Discussion started by: gfhgfnhhn

3. Shell Programming and Scripting

for each different entry in column 1 extract maximum values from column 2 in unix/awk

Discussion started by: Diya123

4. Shell Programming and Scripting

Need to extract data from Column having variable length column

Discussion started by: ns64110