Hitchhiker's Guide to Openbsd

4.13.7 - I got an SHA256 mismatch during install!
Checksums are embedded in the install kernels for the file sets that are used for the system install. 
Actual -release file sets should all match their stored checksums. 
At times, snapshots may not have proper checksums stored with the install kernels. This will happen for various 
reasons on the building side, and is not reason to panic for development snapshots. If you are concerned about this, wait 
http://www.openbsd.org/faq/faq4.html (40 of 43)9/4/2011 10:01:58 AM

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4 - OpenBSD 4.9 Installation Guide
for the next snapshot. 
4.14 - Customizing the install process
siteXX.tgz
 file
The OpenBSD install/upgrade scripts allow the selection of a user-created set called "
siteXX.tgz
", where XX is the 
release version (e.g. 49). The 
siteXX.tgz
 file set is, like the other 
file sets
, a 
gzip(1)
 compressed 
tar(1)
archive rooted 
in '/' and is un-tarred like the other sets with the options 
xzphf
. This set will be installed last, after all other file sets. 
This file set allows the user to add to and/or override the files installed in the 'normal' sets and thus customize the 
installation or upgrade. 
You can also create and use hostname-specific install sets, which are named 
siteXX-.tgz
, for 
example, "
site49-puffy.tgz
". This allows easy per-host customized installations, upgrades, or disaster recovery. 
Some example uses of a 
siteXX.tgz
file: 
●
Create a siteXX.tgz file that contains all the file changes you made since first installing OpenBSD. Then, if you 
have to re-create the system you simply select siteXX.tgz during the re-install and all of your changes are 
replicated on the new system. 
●
Create a series of machine specific directories that each contain a siteXX.tgz file that contains files specific to 
those machine types. Installation of machines (e.g. boxes with different graphics cards) of a particular category 
can be completed by selecting the appropriate siteXX.tgz file. 
●
Put the files you routinely customize in a same or similar way in a siteXX.tgz file -- 
/etc/skel
 files, 
/etc/
pf.conf
, 
/var/www/conf/httpd.conf
, 
/etc/rc.conf.local
, etc.