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Full Discussion: Replacing a string in nth line
Top Forums Shell Programming and Scripting Replacing a string in nth line Post 302202387 by maxmave on Wednesday 4th of June 2008 05:12:37 PM
Old 06-04-2008
Replacing a string in nth line
Hello All,

How to replace a string in nth line of a file using sed or awk.

For Ex: test.txt

Line 1 : TEST1 TEST2 TEST3
Line 2 : TEST1 TEST2 TEST3 TEST4
Line 3 : TEST1 TEST2 TEST3 TEST5
Line 4 : TEST1 TEST2 TEST3 TEST6
Line 5 : TEST1 TEST2 TEST3 TEST7

i want to go to 4th line of a file and replace the word TEST2 in that line with the word DEV2.

Note : this is not a homework. just need some ideas in SED or AWK

Thanks

Rahul
 

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gtypist

GTYPIST(1)							   User Commands							GTYPIST(1)

NAME

       gtypist - a typing tutor with lessons for different keyboards and languages

SYNOPSIS

       gtypist [ options... ] [ script-file ]

DESCRIPTION

       `gtypist' is a typing tutor with several lessons for different keyboards and languages.	New lessons can be written by the user easily.

OPTIONS

       -b     --personal-best
	      track personal best typing speeds

       -e %   --max-error=%
	      default maximum error percentage (default 3.0); valid values are between 0.0 and 100.0

       -n     --notimer
	      turn off WPM timer in drills

       -t     --term-cursor
	      use the terminal's hardware cursor

       -f P   --curs-flash=P
	      cursor flash period P*.1 sec (default 10); valid values are between 0 and 512; this is ignored if -t is specified

       -c F,B --colours=F,B
	      set initial display colours where available

       -s     --silent
	      don't beep on errors

       -q     --quiet
	      same as -s, --silent

       -l L   --start-label=L
	      start the lesson at label 'L'

       -w     --word-processor try to mimic word processors

       -k     --no-skip
	      forbid the user to skip exercises

       -i     --show-errors
	      highlight errors with reverse video

       -h     --help
	      print this message

       -v     --version
	      output version information and exit

       -S     --always-sure
	      do not ask confirmation questions

       --banner-colors=F,B,P,V set top banner colours (background, foreground,
	      package and version respectively)

       --scoring=wpm,cpm
	      set scoring mode (words per minute or characters per minute)

       If not supplied, script-file defaults to '/usr/local/share/gtypist/gtypist.typ'.  The path $GTYPIST_PATH is searched for script files.

EXAMPLES

	      To run the default lesson in english `gtypist.typ':

	      gtypist

	      To run the lesson in spanish:

	      gtypist esp.typ

	      To instruct gtypist to look for lesson `bar.typ' in a non standard directory:

	      GTYPIST_PATH="/home/foo" gtypist bar.typ

	      To  run  the  lesson  in	the  file  `test.typ' of directory `temp', starting at label `TEST1', using the terminal's cursor, and run
	      silently:

	      gtypist -t -q -l TEST1 /temp/test.typ

AUTHOR

       Written by Simon Baldwin

REPORTING BUGS

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COPYRIGHT

       Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Simon Baldwin.
       Copyright (C) 2003, 2004, 2008, 2011 GNU Typist Development Team.  This program comes with ABSOLUTELY NO WARRANTY; for details  please  see
       the file 'COPYING' supplied with the source code.
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SEE ALSO

       The full documentation for gtypist is maintained as a Texinfo manual.  If the info and gtypist programs	are  properly  installed  at  your
       site, the command

	      info gtypist

       should give you access to the complete manual.

gtypist 2.9.1							   November 2011							GTYPIST(1)
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