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POSTINSTALL(8)            BSD System Manager's Manual           POSTINSTALL(8)

     postinstall -- check and fix installation after system upgrades

     postinstall [-a arch] [-d destdir] [-m machine]
                 [-s {srcdir | tgzdir | tgzfile}] operation [item [...]]

     The postinstall utility performs post-installation checks and/or fixes on
     a system's configuration files.  It is especially useful after system
     upgrades, e.g. after updating from NetBSD 1.6.2 to NetBSD 2.0.  The items
     to check or fix are divided in two groups: enabled by default and
     disabled by default.  The latter are items that are dangerous for some
     reason, for example because they remove files which may be still in use.
     If no items are provided, the default checks or fixes are applied.  Those
     which are disabled by default must be provided explicitly.

     Supported options:

           -a arch       MACHINE_ARCH.  Defaults to machine of the host
                         operating system.

           -d destdir    Destination directory to check.  Defaults to /.

           -m machine    MACHINE.  Defaults to machine of the host operating

           -s {srcdir | tgzdir | tgzfile}
                         The location of the reference files, or the NetBSD
                         source files used to create the reference files.
                         This may be specified in one of three ways:

                         -s srcdir      The top level directory of the NetBSD
                                        source tree.  By default this is

                         -s tgzdir      A directory in which reference files
                                        have been extracted from a binary
                                        distribution of NetBSD.  The files
                                        that are distributed in the "etc.tgz"
                                        set file must be present.  The files
                                        that are distributed in the "xetc.tgz"
                                        set file are optional.

                         -s tgzfile     The location of a set file (or "tgz
                                        file") such as "etc.tgz" or "xetc.tgz"
                                        from a binary distribution of NetBSD.
                                        Each set file is a compressed archive
                                        containing reference files, which will
                                        be extracted to the temproot
                                        directory.  Multiple -s options may be
                                        used to specify multiple set files.
                                        The "etc.tgz" set file must be
                                        specified.  The "xetc.tgz" set file is

     The operation argument may be one of:

           check    Perform post-installation checks on items.

           diff [diff(1) options]
                    Similar to check, but also show the differences between
                    the files.

           fix      Apply fixes that check determines need to be applied.  Not
                    all items can be automatically fixed by postinstall, and
                    in some cases an error will be reported, after which
                    manual intervention will be required.

                    Conflicts between existing files in the target file system
                    and new files from the NetBSD distribution are resolved by
                    replacing the existing file with the new file; there is no
                    attempt to merge the files.  See etcupdate(8) for an
                    alternative update method that is able to merge files.

           help     Display a short help.

           list     List available items, showing if they are enabled or
                    disabled by default.

           usage    Same as help.

     The postinstall utility exits 0 on success, and >0 if an error occurs or
     a problem was found.


     The postinstall utility first appeared in NetBSD 1.6.

     In NetBSD 4.0, the -s tgzfile option was added.

     In NetBSD 5.0, the ability to specify multiple colon-separated files with
     a single -s option was deprecated.

     In NetBSD 7.0, the ability to specify multiple colon-separated files with
     a single -s option was removed.  Multiple -s options must be used

BSD                             August 15, 2012                            BSD