host.conf(5) File Formats Manual host.conf(5) host.conf - /etc/host.conf . . : trim . (':') (';') (',') . DNS. . ( : trim NIS hosts(5). .) multi on off. on /etc/hosts . off . reorder on off. on ( ) gethostbyname(3). . off. /etc/host.conf: RESOLV_HOST_CONF /etc/host.conf. RESOLV_MULTI multi. RESOLV_REORDER reorder. RESOLV_ADD_TRIM_DOMAINS (':') (';') (',') . RESOLV_OVERRIDE_TRIM_DOMAINS (':') (';') (',') . trim. /etc/host.conf /etc/resolv.conf /etc/hosts . spoof RESOLV_SPOOF_CHECK off nowarn warn. . nsswitch.conf(5) . glibc 2.4 : order . . bind hosts nis. RESOLV_SERV_ORDER order. glibc 2.0.7 glibc 2.24 : nospoof on off. on rlogin rsh. : . . off. spoofalert on off. on nospoof syslog. off. spoof off nowarn warn. off syslog. warn syslog. nowarn syslog. nowarn. RESOLV_SPOOF_CHECK nospoof spoofalert spoof spoof. off nowarn warn. gethostbyname(3), hosts(5), nsswitch.conf(5), resolv.conf(5), hostname(7), named(8) 3 . . : . 6.18 8 2026 host.conf(5)