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Full Discussion: how can I delete lines without actually going into the file
Top Forums Shell Programming and Scripting how can I delete lines without actually going into the file Post 17098 by thehoghunter on Monday 11th of March 2002 09:39:56 AM
Old 03-11-2002
You can use sed or awk because I don't believe there is any such command that will delete a line without creating a new file.

Simply - use grep -v and search for the specific line (as long as your grep statement is correct you will remove only that line). Send the output to a new temp file and then move it back to the original filename. If you try to use grep -v and send the output to the original file, you would be left with a 0 byte file.
thehoghunter
 

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LEARN ABOUT DEBIAN

xmlstarlet

XMLSTARLET(1)							 xmlstarlet Manual						     XMLSTARLET(1)

NAME

       xmlstarlet - command line XML/XSLT toolkit

SYNOPSIS

       xmlstarlet [<options>] [<command>] [<cmd-options>]

INTRODUCTION

       XMLStarlet is a set of command line utilities (tools) which can be used to transform, query, validate, and edit XML documents and files us-
       ing simple set of shell commands in similar way it is done for plain text files using UNIX grep, sed, awk, diff, patch, join, etc commands.
       This  set of command line utilities can be used by those who deal with many XML documents on UNIX shell command prompt as well as for auto-
       mated XML processing with shell scripts.

OPTIONS

       --version
	      Display the version of xmlstarlet.

       --help Display help.

COMMANDS

       Type: xmlstarlet <command> --help <ENTER> for command help

       Available commands include:

       ed (or edit)
	      Edit/update XML document(s).

       sel (or select)
	      Select data or query XML document(s) (XPATH, etc).

       tr (or transform)
	      Transform XML documents(s) using XSLT.

       val (or validate)
	      Validate XML document(s) (well-formed/DTD/XSD/RelaxNG).

       fo (or format)
	      Format XML document(s).

       el (or elements)
	      Display element structure of XML document.

       c14n (or canonic)
	      XML canonicalization.

       ls (or list)
	      List directory as XML.

       esc (or escape)
	      Escape special XML characters.

       unesc (or unescape)
	      Unescape special XML characters.

       pyx (or xmln)
	      Convert XML into PYX format (based on ESIS - ISO 8879).

       p2x (or depyx)
	      Convert PYX into XML.

REFERENCES

       XMLStarlet is a command line  toolkit  to  query/edit/check/transform  XML  documents  (for  more  information  see  http://xmlstar.source-
       forge.net/).

AUTHOR

       Mikhail Grushinskiy.

																     XMLSTARLET(1)
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