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Full Discussion: Using awk or sed to find a pattern that has lines before and after it
Top Forums Shell Programming and Scripting Using awk or sed to find a pattern that has lines before and after it Post 302974121 by ran_bon_78 on Wednesday 25th of May 2016 06:39:21 PM
Old 05-25-2016
Using awk or sed to find a pattern that has lines before and after it
Dear gurus,
Please help this beginner to write and understand the required script. I am looking for useing awk for sed.

I have a few thousand lines file whose contain are mostly as below and I am trying to achieve followings.
1. Find a string, say user1. Then hash the line containing the string along with 2 lines before and 1 line after.
2. The script should not hast other lines like user10,11,12 etc.

The file looks like as below.
Code:
        start {
                UID 5001
                NAME  user1
                }
        start {
                UID 5002
                NAME  user2
                }
        start {
                UID 5003
                NAME  user3
                }
        start {
                UID 5004
                NAME  user4
                }
        start {
                UID 5005
                NAME  user5
                }
        start {
                UID 5006
                NAME  user6
                }
        start {
                UID 5007
                NAME  user7
                }
        start {
                UID 5008
                NAME  user8
                }
        start {
                UID 5009
                NAME  user9
                }
        start {
                UID 5010
                NAME  user10
                }
        start {
                UID 5011
                NAME  user11
                }
        start {
                UID 5012
                NAME  user12
                }
        start {
                UID 5013
                NAME  user13
                }
        start {
                UID 5014
                NAME  user14
                }
        start {
                UID 5015
                NAME  user15
                }
        start {
                UID 5016
                NAME  user16
                }
        start {
                UID 5017
                NAME  user17
                }
        start {
                UID 5018
                NAME  user18
                }
        start {
                UID 5019
                NAME  user19
                }
        start {
                UID 5020
                NAME  user20
                }

Thanks in advance
Randy
Last edited by Scott; 05-25-2016 at 08:15 PM.. Reason: Please use code tags
 

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LEARN ABOUT DEBIAN

pyp

PYP(1)							      General Commands Manual							    PYP(1)

NAME

       pyp - The Pyed Piper: A Modern Python Alternative to awk, sed and Other Unix Text Manipulation Utilities

SYNOPSIS

       pyp [options] files ...

DESCRIPTION

       pyp,  the  Pyed Piper, is a command line tool for text manipulation. It is similar to awk and sed in functionality, but its subcommands are
       Python based, and thus more familiar to many programmers.

       It can operate both on a per-line base and on the complete input stream.  Different features can be pipelined in a single command by  using
       the pipe character familiar from shell commands.

       pyp  backs  up  its  input  for reruns with modified commands, and can save commands as macros. On the downside, the rerun feature makes it
       unsuitable for continuous pipe operation.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.	For a complete description, use --manual.

       -h, --help
	      Show this help message and exit.

       -m, --manual
	      Prints out extended help.

       -l, --macro_list
	      Lists all available macros.

       -s MACRO_SAVE_NAME, --macro_save=MACRO_SAVE_NAME
	      Saves current command as macro. use "#" for adding
	      comments	EXAMPLE:
	      pyp -s "great_macro # prints first letter" "p[1]".

       -f MACRO_FIND_NAME, --macro_find=MACRO_FIND_NAME
	      Searches for macros with keyword or user name.

       -d MACRO_DELETE_NAME, --macro_delete=MACRO_DELETE_NAME
	      Deletes specified public macro.

       -g, --macro_group
	      Specify group macros for save and delete; default is user.

       -t TEXT_FILE, --text_file=TEXT_FILE
	      Specify text file to load. For advanced users,
	      you should typically cat a file into pyp.

       -x, --execute
	      Execute all commands.

       -c, --turn_off_color
	      Prints raw, uncolored output.

       -u, --unmodified_config
	      Prints out generic PypCustom.py config file.

       -b BLANK_INPUTS, --blank_inputs=BLANK_INPUTS
	      Generate this number of blank input lines; useful for
	      generating numbered lists with variable 'n'.

       -n, --no_input
	      Use with command that generates output with no input;
	      same as --dummy_input 1.

       -k, --keep_false
	      Print blank lines for lines that test as False.
	      default is to filter out False lines from the output.

       -r, --rerun
	      Rerun based on automatically cached data from the last run.
	      Use this after executing "pyp", pasting input into the shell,
	      and hitting CTRL-D.

SEE ALSO

       awk(1), grep(1), sed(1).

AUTHOR

       pyp was written by Toby Rosen <tobyrosen@gmail.com>.

       This manual page was written by Khalid El Fathi <khalid@elfathi.fr>, for the Debian project (and may be used by others).

								  March 19, 2012							    PYP(1)
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