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Full Discussion: How to replace all but the first 3 characters with sed?
Top Forums Shell Programming and Scripting How to replace all but the first 3 characters with sed? Post 302935009 by DGPickett on Thursday 12th of February 2015 10:43:54 AM
Old 02-12-2015
The '\(...\)' and '\1' feature has been known to be a bit slow relative to simpler choices.

Maybe awk could get the length of the line - 3 and substring a string of "***************" to produce the rest of the line, faster? Or do you need perl/python/ruby for that?
 

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LEARN ABOUT DEBIAN

ruby-switch

RUBY-SWITCH(1)															    RUBY-SWITCH(1)

NAME

       ruby-switch - switch between different Ruby interpreters

USAGE

       ruby-switch --list

       ruby-switch --check

       ruby-switch --set RUBYVERSION

       ruby-switch --auto

DESCRIPTION

       ruby-switch can be used to easily switch to different Ruby interpreters as the default system-wide interpreter for your Debian system.

       When run with --list, all supported Ruby interpreters are listed.

       When --check is passed, ruby-switch will check which Ruby interpreter is currently being used. If the settings are inconsistent -- e.g.
	 `ruby` is Ruby 1.8 and `gem` is using Ruby 1.9.1, ruby-switch will issue a big warning.

       When --set RUBYINTERPRETER is used ruby-switch will switch your system to the corresponding Ruby interpreter. This includes, for example,
       the default implementations for the following programs: ruby, gem, irb, erb, testrb, rdoc, ri.

       ruby-switch --set auto will make your system use the default Ruby interpreter currently suggested by Debian.

OPTIONS

       -h, --help
	   Displays the help and exits.

A NOTE ON RUBY 1.9.x
       Ruby uses two parallel versioning schemes: the `Ruby library compatibility version' (1.9.1 at the time of writing this), which is similar
       to a library SONAME, and the `Ruby version' (1.9.3 is about to be released at the time of writing).

       Ruby packages in Debian are named using the Ruby library compatibility version, which is sometimes confusing for users who do not follow
       Ruby development closely.

       ruby-switch also uses the Ruby library compatibility version, so specifying `ruby1.9.1' might give you Ruby with version 1.9.2, or with
       version 1.9.3, depending on the current Ruby version of the `ruby1.9.1' package.

COPYRIGHT AND AUTHORS

       Copyright (c) 2011, Antonio Terceiro <terceiro@debian.org>

       This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
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       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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       You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.

								    2011-11-20							    RUBY-SWITCH(1)
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