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Full Discussion: Emptying the history
Top Forums Shell Programming and Scripting Emptying the history Post 302765841 by Corona688 on Sunday 3rd of February 2013 03:43:33 PM
Old 02-03-2013
They could back up your history file every time you login and logout, install rootkits, or any number of things. You cannot prevent root from being root.
 

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Devel::REPL::Plugin::ReadLineHistory(3pm)		User Contributed Perl Documentation		 Devel::REPL::Plugin::ReadLineHistory(3pm)

NAME
Devel::REPL::Plugin::ReadLineHistory - Integrate history with the facilities provided by Term::ReadLine DESCRIPTION
This plugin enables loading and saving command line history from a file as well has history expansion of previous commands using the !-syntax a la bash. By default, history expansion is enabled with this plugin when using Term::ReadLine::Gnu. That means that "loose" '!' characters will be treated as history events which may not be what you wish. To avoid this, you need to quote the '!' with '': my $var = "foo!"; or place the arguments in single quotes---but enable the "Term::ReadLine" attribute "history_quotes_inhibit_expansion": $_REPL->term->Attribs->{history_quotes_inhibit_expansion} = 1; my $var = 'foo!'; and to disable history expansion from GNU readline/history do $_REPL->term->Attribs->{do_expand} = 0; CONFLICTS
Note that Term::ReadLine::Perl does not support a history expansion method. In that case, you may wish to use the Devel::REPL History plugin which provides similar functions. Work is underway to make use of either History or ReadLineHistory consistent for expansion with either the Term::ReadLine::Gnu support or Term::ReadLine::Perl. perl v5.14.2 2010-06-13 Devel::REPL::Plugin::ReadLineHistory(3pm)
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