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Full Discussion: How to copy only some lines from very big file?
Top Forums UNIX for Beginners Questions & Answers How to copy only some lines from very big file? Post 302965774 by vidyadhar85 on Tuesday 2nd of February 2016 11:59:08 PM
Old 02-03-2016
If you have latest grep you have below options in grep
Context Line Control
Quote:
-A NUM, --after-context=NUM
Print NUM lines of trailing context after matching lines. Places a line containing a group separator (--) between contiguous
groups of matches. With the -o or --only-matching option, this has no effect and a warning is given.
-B NUM, --before-context=NUM
Print NUM lines of leading context before matching lines. Places a line containing a group separator (--) between contiguous
groups of matches. With the -o or --only-matching option, this has no effect and a warning is given.
-C NUM, -NUM, --context=NUM
Print NUM lines of output context. Places a line containing a group separator (--) between contiguous groups of matches. With
the -o or --only-matching option, this has no effect and a warning is given.
or you can use awk


awk 'c-->0;/pattern/{c=98}' Infile
This User Gave Thanks to vidyadhar85 For This Post:
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LEARN ABOUT X11R4

head

HEAD(1) 							   User Commands							   HEAD(1)

NAME

       head - output the first part of files

SYNOPSIS

       head [OPTION]... [FILE]...

DESCRIPTION

       Print the first 10 lines of each FILE to standard output.  With more than one FILE, precede each with a header giving the file name.

       With no FILE, or when FILE is -, read standard input.

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

       -c, --bytes=[-]NUM
	      print the first NUM bytes of each file; with the leading '-', print all but the last NUM bytes of each file

       -n, --lines=[-]NUM
	      print the first NUM lines instead of the first 10; with the leading '-', print all but the last NUM lines of each file

       -q, --quiet, --silent
	      never print headers giving file names

       -v, --verbose
	      always print headers giving file names

       -z, --zero-terminated
	      line delimiter is NUL, not newline

       --help display this help and exit

       --version
	      output version information and exit

       NUM  may have a multiplier suffix: b 512, kB 1000, K 1024, MB 1000*1000, M 1024*1024, GB 1000*1000*1000, G 1024*1024*1024, and so on for T,
       P, E, Z, Y.

AUTHOR

       Written by David MacKenzie and Jim Meyering.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report head translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 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

       tail(1)

       Full documentation at: <http://www.gnu.org/software/coreutils/head>
       or available locally via: info '(coreutils) head invocation'

GNU coreutils 8.28						   January 2018 							   HEAD(1)
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