OpenBSD

Wireless configuration

Open /etc/hostname.<interface>, e.g. /etc/hostname.wlan0

lladdr = link layer address (MAC address)

lladdr random nwid <network name> wpakey "passphrase"
dhcp

For Ethernet only the second line for DHCP configuration is required.

Start the network service.

sh /etc/netstart

Update

doas fw_update
doas sysmerge

system stats:

systat

Update all packages

pkg_add -u

Delete no longer needed dependencies

pkg_delete -a

Get a list of installed packages

pkg_info -mz > list

Install with

pkg_add -l list

Release Upgrade

pkg_info -mz > installed_packages
sysupgrade
Run sysmerge again after boot to merge configuration files that could not be merged automatically during boot
Check configuration changes
Remove old files if any
Check special package notes
syspatch (check errata page of release)
Update system packages pkg_add -u
Delete unneeded dependencies pkg_delete -a

debug issues with X

At the bootprompt do "boot -s"
Enter on the "Enter pathname of shell or RETURN for sh" prompt
mount /
mount -a
swapon -a
rcctl disable xenodm
exit
Now log in and get the dmesg and the error that happens when you "rcctl -f start xenodm"

OpenBSD version you're running

sysctl -n kern.version

OpenBSD X.Y-beta           = ongoing development *before* X.Y
OpenBSD X.Y with no suffix = release
OpenBSD X.Y-stable         = stable branch based on the X.Y release
OpenBSD X.Y-current        = ongoing development *after* X.Y

Capturing traffic on a server

-i sets the interface, and -s sets the size parameter to the maximum. Otherwise, only the first 116 bytes are captured by default.

doas tcpdump -i lo0 -w output.pcap -s 65535

Interface configuration

doas ifconfig vio0 INTERFACE_IP/22
doas route add default GATEWAY_IP