11-15-2005
extracting lines from a file
Hi all,
I need to extract some lines from a file based on a condition. For ex:
My file will contain 50 lines and i need to extract line which has "File" in it and then the line which has "date" in it. Which command will be the most efficient way to do it. I have tried two ways
1. reading the file line by line and seperating the line if the line has the filed "File"
2. grep the file for the field "File" .
Since i need to open around 1000 files and perform the operation , can anyone provide me the most optimal way to do it .
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LEARN ABOUT DEBIAN
unrar-free
UNRAR-FREE(1) General Commands Manual UNRAR-FREE(1)
NAME
unrar-free -- extract files from rar archives
SYNOPSIS
unrar-free [-xtfp?V] [--extract] [--list] [--force] [--extract-newer] [--extract-no-paths] [--password] [--help] [--usage] [--ver-
sion] ARCHIVE [FILE ...] [DESTINATION]
DESCRIPTION
unrar-free is a program for extracting files from rar archives.
OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is
included below.
-x --extract
Extract files from archive (default).
-t --list
List files in archive.
-f --force
Overwrite files when extracting.
--extract-newer
Only extract newer files from the archive.
--extract-no-paths
Don't create directories while extracting.
-p --password
Decrypt archive using a password.
-? --help
Show program help.
--usage Show short program usage message.
-V --version
Show version of program.
NON-FREE UNRAR COMPATIBLE SYNOPSIS
unrar-free [elvx] [-ep] [-o+] [-o-] [-ppassword] [-u] [--] ARCHIVE [FILE ...] [DESTINATION]
This syntax should only be used in front-end programs which are using non-free unrar as a back-end. It is recommended to use this program
by GNU command line syntax.
e Extract files from archive without full path.
l List files in archive.
v Verbose list files in archive.
x Extract files from archive with full path.
-ep Don't create directories while extracting.
-o+ Overwrite files when extracting.
-o- Don't overwrite files when extracting.
-p Decrypt archive using a password.
-u Only extract newer files from the archive.
-- Disable further switch processing. Any switch after the -- are treated as filenames and destination.
BUGS
Advanced features of version 3.0 archives are not currently supported.
AUTHORS
unrar-free was written by Ben Asselstine based on UniquE RAR File Library by Christian Scheurer and Johannes Winkelmann.
This manual page was written by Niklas Vainio <niklas.vainio@iki.fi> for the Debian system (but may be used by others). Permission is
granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version pub-
lished by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
UNRAR-FREE(1)