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Full Discussion: How to delete all lines before a particular pattern when the pattern is defined in a variable?
Top Forums Shell Programming and Scripting How to delete all lines before a particular pattern when the pattern is defined in a variable? Post 303004061 by RudiC on Tuesday 26th of September 2017 04:20:12 AM
Old 09-26-2017
May not be the most efficient:
Code:
tac file | sed -n "/$var/q; p;" | tac
Line 4
Line 5

Last edited by RudiC; 09-26-2017 at 06:04 AM.. Reason: overread the request to use a variable.
This User Gave Thanks to RudiC For This Post:
drl
 

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LEARN ABOUT DEBIAN

tac

TAC(1)								   User Commands							    TAC(1)

NAME

       tac - concatenate and print files in reverse

SYNOPSIS

       tac [OPTION]... [FILE]...

DESCRIPTION

       Write each FILE to standard output, last line first.  With no FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -b, --before
	      attach the separator before instead of after

       -r, --regex
	      interpret the separator as a regular expression

       -s, --separator=STRING
	      use STRING as the separator instead of newline

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by Jay Lepreau and David MacKenzie.

REPORTING BUGS

       Report tac bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report tac translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2011 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       rev(1)

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

	      info coreutils 'tac invocation'

       should give you access to the complete manual.

GNU coreutils 8.12.197-032bb					  September 2011							    TAC(1)
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