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Top Forums UNIX for Advanced & Expert Users replacing first line or lines in a file Post 302077777 by x96riley3 on Monday 26th of June 2006 10:37:14 AM
Old 06-26-2006
Since the source file and destination file are the same, consider doing something like this.

Input file called inputfile.txt contains just the word 'This'

commandline
perl -pi -w -e 's/This/I did it/g;' inputfile.txt
#This replaces the word This with I did it all from the commandline

inside script called myscript.pl
perl -pi -w -e 's/This/I did it/g;' $1
#Put this perl line inside a script and run it. Passing your input file to the script

Run script from commandline.

#myscript.pl inputfile.txt

-X
 

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GENCFU(1)							 ICU 50.1.2 Manual							 GENCFU(1)

NAME
gencfu - Generates Unicode Confusable data files SYNOPSIS
gencfu [ -h, -?, --help ] [ -V, --version ] [ -c, --copyright ] [ -v, --verbose ] [ -d, --destdir destination ] [ -i, --icudatadir direc- tory ] -r, --rules rule-file -w, --wsrules whole-script-rule-file -o, --out output-file DESCRIPTION
gencfu reads confusable character definitions in the input file, which are plain text files containing confusable character definitions in the input format defined by Unicode UAX39 for the files confusables.txt and confusablesWholeScript.txt. This source (.txt) format is also accepted by ICU spoof detectors. The files must be encoded in utf-8 format, with or without a BOM. Normally the output data file has the .cfu extension. OPTIONS
-h, -?, --help Print help about usage and exit. -V, --version Print the version of gencfu and exit. -c, --copyright Embeds the standard ICU copyright into the output-file. -v, --verbose Display extra informative messages during execution. -d, --destdir destination Set the destination directory of the output-file to destination. -i, --icudatadir directory Look for any necessary ICU data files in directory. For example, the file pnames.icu must be located when ICU's data is not built as a shared library. The default ICU data directory is specified by the environment variable ICU_DATA. Most configurations of ICU do not require this argument. -r, --rules rule-file The source file to read. -w, --wsrules whole-script-rule-file The whole script source file to read. -o, --out output-file The output data file to write. VERSION
1.0 COPYRIGHT
Copyright (C) 2009 International Business Machines Corporation and others ICU MANPAGE
24 May 2009 GENCFU(1)
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