NSS-MYHOSTNAME(8) nss-myhostname NSS-MYHOSTNAME(8) (NAME) nss-myhostname - IP (SYNOPSIS) libnss_myhostname.so.2 (DESCRIPTION) nss-myhostname (NSS Name Service Switch) (glibc) gethostname(2) . : o IP (scope) -- -- IPv4 127.0.0.2 ( ) IPv6 ::1 ( ). o "localhost" "localhost.localdomain" ( ".localhost" ".localhost.localdomain" ) IP 127.0.0.1 ::1 . o "_gateway" (metric) . . o "_outbound" IPv4 IPv6 . ( ) IP . . IP . . /etc/hosts . /etc/ . nss-myhostname /etc/hosts . NSS "myhostname" "hosts:" /etc/nsswitch.conf . "myhostname" "files" "dns" . "localhost" . nss-resolve /etc/hosts . nss-myhostname ( nss-resolve) -- IP . DNS . (EXAMPLE) /etc/nsswitch.conf nss-myhostname : passwd: files systemd group: files [SUCCESS=merge] systemd shadow: files systemd gshadow: files systemd hosts: mymachines resolve [!UNAVAIL=return] files myhostname dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis getent(1) glibc : $ getent ahosts `hostname` ::1 STREAM omega ::1 DGRAM ::1 RAW 127.0.0.2 STREAM 127.0.0.2 DGRAM 127.0.0.2 RAW omega . (SEE ALSO) systemd(1), nss-systemd(8), nss-resolve(8), nss-mymachines(8), nsswitch.conf(5), getent(1) systemd 261.2 NSS-MYHOSTNAME(8)