openbsd cheatsheet

openbsd-cheatsheet.md

openbsd cheatsheet

manuals

manuals: man(1), apropos(1)

• man man - read the manual for the pkg_info command.
• man 5 ethers - read a manual in a specific section, such as ethers(5)
• apropos <manname> - search for manuals by name

packages

manuals: pkg_info(1), pkg_mgr(1), pkg_add(1), pkg_delete(1)

• pkg_info -Q <pkgname> - query for a package name
• pkg_mgr - curses package manager
• pkg_add -vi <pkgname> - install a package by name, prompting when an ambiguous package name is given
• pkg_delete <pkgname> - remove a package

firewall

manuals: pf.conf(5), pfctl(8)

• pfctl -vvsr | grep @ - view the expanded firewall rules with their rule number
• $EDITOR /etc/pf.conf - edit the firewall rules
• pfctl -Fr -f /etc/pf.conf - flush the current rules and load new ones from /etc/pf.conf

daemons

manuals: rc.d(8)

• /etc/rc.d/<daemon> restart - restart a daemon

network management

manuals: ethers(5), hosts(5), dnsmasq(8)

• $EDITOR /etc/ethers && $EDITOR /etc/hosts - add a static ip entry
• $EDITOR /etc/dnsmasq.conf && /etc/rc.d/dnsmasq restart - edit dnsmasq's config for dns and dhcp configuration and then restart it