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Top Forums UNIX for Dummies Questions & Answers Using awk to delete a certain line Post 302706549 by elixir_sinari on Thursday 27th of September 2012 02:04:10 AM
Old 09-27-2012
Code:
x=5
perl -ni_backup -e 'next if /\b'"$x"'\b/;print' num.txt

Please note that sed and awk are filters; they will read from the input source (standard input or files supplied as arguments) and throw back whatever you asked to output to standard output. They will not modify the input source.

Last edited by elixir_sinari; 09-27-2012 at 03:17 AM..
 

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POD2USAGE(1)						 Perl Programmers Reference Guide					      POD2USAGE(1)

NAME
pod2usage - print usage messages from embedded pod docs in files SYNOPSIS
pod2usage [-help] [-man] [-exit exitval] [-output outfile] [-verbose level] [-pathlist dirlist] file OPTIONS AND ARGUMENTS
-help Print a brief help message and exit. -man Print this command's manual page and exit. -exit exitval The exit status value to return. -output outfile The output file to print to. If the special names "-" or ">&1" or ">&STDOUT" are used then standard output is used. If ">&2" or ">&STDERR" is used then standard error is used. -verbose level The desired level of verbosity to use: 1 : print SYNOPSIS only 2 : print SYNOPSIS sections and any OPTIONS/ARGUMENTS sections 3 : print the entire manpage (similar to running pod2text) -pathlist dirlist Specifies one or more directories to search for the input file if it was not supplied with an absolute path. Each directory path in the given list should be separated by a ':' on Unix (';' on MSWin32 and DOS). file The pathname of a file containing pod documentation to be output in usage message format (defaults to standard input). DESCRIPTION
pod2usage will read the given input file looking for pod documentation and will print the corresponding usage message. If no input file is specified then standard input is read. pod2usage invokes the pod2usage() function in the Pod::Usage module. Please see "pod2usage()" in Pod::Usage. SEE ALSO
Pod::Usage, pod2text(1) AUTHOR
Please report bugs using <http://rt.cpan.org>. Brad Appleton <bradapp@enteract.com> Based on code for pod2text(1) written by Tom Christiansen <tchrist@mox.perl.com> perl v5.16.2 2013-08-25 POD2USAGE(1)
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