(cache)OpenBSD Jumpstart

history

Forked from NetBSD. Theo de Raadt is the founder and leader of the OpenBSD project. The first OpenBSD release 1.1/CVS appear on October 18, 1995.

why use openbsd

UNIX-like
Get the latest version of OpenSSH, OpenSMTPD, OpenRSYNC, OpenNTPD, OpenIKED, OpenBGPD, LibreSSL, mandoc
Get the latest PF (Packet Filter) features
Get carp(4), httpd(8), relayd(8), vmd(8)
Security focused Operating System (unveil(2), pledge(2)...)
Thorough documentation
Cryptography

openbsd innovations

Software and ideas developed or maintained by the OpenBSD project:

openbsd version numbers

openbsd's flavors

cvs repository

Choose your repository at:

cvsweb

CVSweb is a WWW interface for CVS repositories with which you can browse a file hierarchy on your browser to view each file's revision history in a very handy manner:

manual pages

Or view it on your browser at:

installation

Really simple, ready in 5 minutes (). The response file is emailed to the root user on next boot.

Get more information:

auto-install

Use or you can try package for a full unattended install/upgrade process.

networking files

Read: , , ,

networking

Networking (set at startup)

Example 1: configure static IP address for re0

Don't forget to run to apply changes to running system.

Networking (set at startup)

Example 2: configure DHCP for bge0

Don't forget to run to apply changes to running system.

Networking (set at startup)

Example 3: configure wireless

Don't forget to run to apply changes to running system.

routing

PF ruleset sample

Read:

PF (Packet Filter)

(Useful commands)

Read:

Debug PF with tcpdump

Read:

PF User's Guide

Manage users

Read:

Manage Groups

File: /etc/group

Members in wheel group can use to become root.

Read: ,

sudo replaced with doas(1)

Read: ,

Try website.

Install Packages

Look in for extra documentation.

Read: , ,

Packages

Read: ,

Packages (continued)

Read:

Install non-free firmware packages

Firmware is downloaded from release-specific directories at:

Read:

Manage daemons, services

File: /etc/rc.conf.local

Read:

Run a script at startup

File: /etc/rc.local

Read:

Update OpenBSD (-stable)

Any security or reliability fixes can be found at:

Errata patches are generated for the 2 last releases (, ).

Update OpenBSD (-stable), the tools

Use to update your kernel and userland, available for the last 2 release.

And to update packages.

Upgrade OpenBSD

To upgrade 6.4 to 6.6, you need to follow instructions from: and then

, is a utility to upgrade OpenBSD to the next release or a new snapshot.

OpenBSD Filesystem

OpenBSD Filesystem (continued)

Read:

OpenBSD Kernels

Pure kernel executable (the operating system loaded into memory at boot-time).

In case of multiple processors will rename /bsd to /bsd.sp and finally /bsd.mp to /bsd

OpenBSD Kernels (continued)

Pure kernel executable, a resume from hibernation (handled by the bootloader).

OpenBSD Kernels

Old kernel, next boot it will use the new kernel /bsd (kernel relinking).

OpenBSD Kernels (continued)

Pure kernel executable for single processor.

OpenBSD Kernels (continued)

Pure kernel executable for multiprocessor machines.

OpenBSD Kernels (continued)

Installation kernel. The built-in RAM disk contains utilities which can be run without an external file system, so this kernel is useful for limited system maintenance too.