Description:

nss-myhostname is a plugin for the GNU Name Service Switch (NSS)
functionality of the GNU C Library (glibc) providing host name
resolution for the locally configured system hostname as returned by
gethostname(2). A lot of software relies on that the local host name
is resolvable via DNS to an IPv4 or IPv6 address. When using dynamic
hostnames this is usually achieved by patching /etc/hosts which
however is suboptimal since it requires a writable /etc file system
and is fragile because the file might also be edited by the
administrator. nss-myhostname simply returns the IPv4 address
127.0.0.2 (wich is on the local loopback) and the IPv6 address ::1
(which is the local host) for whatever system hostname is configured
locally. Patching /etc/hostname is thus no longer necessary.