[[!meta copyright="Copyright © 2007, 2008, 2010, 2011 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] A persistent object is an object that survives reboot. On [[Unix]], files and directories are persistent but processes and [[unix/file_descriptor]]s are not. [[microkernel/EROS]] is an example of an orthogonally persistent system: processes and [[capabilities|capability]] also survive reboot. To a process, it generally only looks as if it had not been scheduled for a long time; the rest of its environment remains essentially the indistinguishable. # GNU/Hurd The GNU/Hurd is not a persistent system: there are no persistent [[capabilities|capability]]. All data that is stored in files in the file system, is serialized. # Further Reading [[!toggleable id=shapiro_capintro_1999 text="""[[!template id=note text="*[[shapiro\_capintro\_1999|capability]]*: {{$capability#shapiro_capintro_1999}}. {{$capability#shapiro_capintro_1999_text}}."]]"""]] * Section *Writing Things Down* in [[!toggle id=shapiro_capintro_1999 text="[shapiro\_capintro\_1999]"]]. [[!tag open_issue_documentation]]