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Full Discussion: remove lines from file
Top Forums Shell Programming and Scripting remove lines from file Post 302296809 by vidyadhar85 on Wednesday 11th of March 2009 11:08:06 PM
Old 03-12-2009
first check wthether you have latest version of sed which comes with -i option
you can check this in man page if you have that you can do
Code:
sed -i '1,10000d' huge_file > temp_file

if you don't have the -i option
Code:
sed -n '1,10000p' huge_file > file1
sed -n '10001,$p' huge_file > temp_file
cat temp_file >huge_file

 

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Arch::TempFiles(3pm)					User Contributed Perl Documentation				      Arch::TempFiles(3pm)

NAME
Arch::TempFiles - help to manage temporary files/dirs SYNOPSIS
use Arch::TempFiles qw(temp_file_name temp_file temp_dir); # all will be removed automatically on the script completion my $file_name1 = temp_file(); my $file_name2 = temp_file_name("status"); my $dir_name = temp_dir("arch-tree"); use Arch::TempFiles; my $tmp = new Arch::TempFiles; $tmp->root($tmp->dir); my $file_name = $tmp->name; open OUT, ">$file_name"; close OUT; DESCRIPTION
This module deals with temporary file names. It is similar to File::Temp, but simplier and more focused. Also, File::Temp is relatively new and was not shipped with older perl versions. Both function interface and object oriented interface are supported. FUNCTIONS
/METHODS The following functions are available: temp_root, temp_name, temp_file_name, temp_dir_name, temp_file, temp_dir. The corresponding class methods are available too: root, name, file_name, dir_name, file, dir. temp_root [dir] $tmp->root [dir] Change or return the root of the temporary files and dirs. The default is either $ENV{TMP_DIR} or "/tmp". temp_name [label] $tmp->name [label] Return the unused temporary file name. The default file name is "/tmp/,,arch-XXXXXX" where XXXXXX is a random number. To change this name use "temp_root" and/or provide label that replaces "arch". Please note, that the operation of acquiring the file name using this function/method and actual creating of this file is not atomic. So you may need to call this method again if the creation is failed, for example if some other process created the same file in the middle. temp_file_name [label] $tmp->file_name [label] Like "temp_name", but stores the name in the file list that will be removed on the end (on object destruction). temp_dir_name [label] $tmp->dir_name [label] Like "temp_name", but stores the name in the dir list that will be removed on the end (on object destruction). temp_file [label] $tmp->file [label] Like "temp_file_name", but also creates the file. temp_dir [label] $tmp->dir [label] Like "temp_dir_name", but also creates the dir. BUGS
Awaiting for your reports. AUTHORS
Mikhael Goikhman (migo@homemail.com--Perl-GPL/arch-perl--devel). SEE ALSO
For a different interface, see File::Temp. perl v5.10.1 2005-04-22 Arch::TempFiles(3pm)
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