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2<!DOCTYPE sections SYSTEM "/dtd/book.dtd"> 2<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3 3
4<!-- The content of this document is licensed under the CC-BY-SA license --> 4<!-- The content of this document is licensed under the CC-BY-SA license -->
5<!-- See http://creativecommons.org/licenses/by-sa/2.5 --> 5<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
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7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-working-use.xml,v 1.54 2013/07/23 20:14:45 swift Exp $ --> 7<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-working-use.xml,v 1.55 2013/12/17 11:29:20 swift Exp $ -->
8 8
9<sections> 9<sections>
10 10
11<abstract> 11<abstract>
12USE flags are a very important aspect of Gentoo. In this chapter, you learn to 12USE flags are a very important aspect of Gentoo. In this chapter, you learn to
13work with USE flags and understand how USE flags interact with your system. 13work with USE flags and understand how USE flags interact with your system.
14</abstract> 14</abstract>
15 15
16<version>5</version> 16<version>6</version>
17<date>2013-07-23</date> 17<date>2013-12-17</date>
18 18
19<section> 19<section>
20<title>What are USE flags?</title> 20<title>What are USE flags?</title>
21<subsection> 21<subsection>
22<title>The ideas behind USE flags</title> 22<title>The ideas behind USE flags</title>
279If you have altered your USE flags and you wish to update your entire system to 279If you have altered your USE flags and you wish to update your entire system to
280use the new USE flags, use <c>emerge</c>'s <c>--newuse</c> option: 280use the new USE flags, use <c>emerge</c>'s <c>--newuse</c> option:
281</p> 281</p>
282 282
283<pre caption="Rebuilding your entire system"> 283<pre caption="Rebuilding your entire system">
284# <i>emerge --update --deep --newuse world</i> 284# <i>emerge --update --deep --newuse @world</i>
285</pre> 285</pre>
286 286
287<p> 287<p>
288Next, run Portage's depclean to remove the conditional dependencies that 288Next, run Portage's depclean to remove the conditional dependencies that
289were emerged on your "old" system but that have been obsoleted by the new USE 289were emerged on your "old" system but that have been obsoleted by the new USE

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