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Top Forums Shell Programming and Scripting How to delete strings in a file? Post 302906933 by jim mcnamara on Tuesday 24th of June 2014 03:42:38 PM
Old 06-24-2014
Sure.
Try awk:
Code:
awk 'substr($1,1,1)=="^" 
           {print $1; next}
       {print $0 } '   infile  > tmpfile
# review the tempfile to be sure it is okay.
mv tmpfile infile

 

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explain_tmpfile_or_die(3)				     Library Functions Manual					 explain_tmpfile_or_die(3)

NAME
explain_tmpfile_or_die - create a temporary file and report errors SYNOPSIS
#include <libexplain/tmpfile.h> FILE *explain_tmpfile_or_die(void); FILE *explain_tmpfile_on_error(void); DESCRIPTION
The explain_tmpfile_or_die function is used to call the tmpfile(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_tmpfile(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_tmpfile_on_error function is used to call the tmpfile(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_tmpfile(3) function, but still returns to the caller. RETURN VALUE
The explain_tmpfile_or_die function only returns on success, see tmpfile(3) for more information. On failure, prints an explanation and exits, it does not return. The explain_tmpfile_on_error function always returns the value return by the wrapped tmpfile(3) system call. EXAMPLE
The explain_tmpfile_or_die function is intended to be used in a fashion similar to the following example: FILE *result = explain_tmpfile_or_die(); SEE ALSO
tmpfile(3) create a temporary file explain_tmpfile(3) explain tmpfile(3) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2009 Peter Miller explain_tmpfile_or_die(3)
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