/usr/share/nagios-plugins/templates-standard/ is in nagios-plugins-standard 1.5-3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/nagios-plugins/templates-standard/breeze.cfg
/usr/share/nagios-plugins/templates-standard/disk-smb.cfg
/usr/share/nagios-plugins/templates-standard/dns.cfg
/usr/share/nagios-plugins/templates-standard/flexlm.cfg
/usr/share/nagios-plugins/templates-standard/fping.cfg
/usr/share/nagios-plugins/templates-standard/games.cfg
/usr/share/nagios-plugins/templates-standard/hppjd.cfg
/usr/share/nagios-plugins/templates-standard/ifstatus.cfg
/usr/share/nagios-plugins/templates-standard/ldap.cfg
/usr/share/nagios-plugins/templates-standard/mailq.cfg
/usr/share/nagios-plugins/templates-standard/mrtg.cfg
/usr/share/nagios-plugins/templates-standard/mysql.cfg
/usr/share/nagios-plugins/templates-standard/netware.cfg
/usr/share/nagios-plugins/templates-standard/nt.cfg
/usr/share/nagios-plugins/templates-standard/pgsql.cfg
/usr/share/nagios-plugins/templates-standard/radius.cfg
/usr/share/nagios-plugins/templates-standard/rpc-nfs.cfg
/usr/share/nagios-plugins/templates-standard/snmp.cfg