dhcpcd configuration

You should read the  dhcpcd.conf man page and put your options into /etc/dhcpcd.conf. The default configuration file should work for most people just fine. Here it is, in case you lose it.

# A sample configuration for dhcpcd.
# See dhcpcd.conf(5) for details.

# We normally want to inform the DHCP server of our hostname for DDNS.
hostname

# A list of options we should request from the DHCP server.
option domain_name_servers, domain_name, domain_search, host_name
# Most distros have ntp support.
option ntp_servers

# We should behave nicely on networks and respect their MTU.
# However, a lot of buggy DHCP servers set invalid MTUs so this is not
# enabled by default.
#option interface_mtu

# We provide a hook script to lookup the hostname if not set by the DHCP
# server, but we should not run it by default.
nohook lookup-hostname

The  dhcpcd man page has a lot of the same options and more, which only apply to calling dhcpcd from the command line.

Feel free to edit this section to describe any workarounds to handle specific situations that other people may encounter.