In the example above, find and display every file in /etc containing the string nameserver with the corresponding line, including line number, sample output:
/etc/ppp/ip-up.d/0dns-up:9:# Rev. Dec 22 1999 to put dynamic nameservers last.
/etc/ppp/ip-up.d/0dns-up:23:# nameservers given by the administrator. Those for which 'Dynamic' was chosen
/etc/ppp/ip-up.d/0dns-up:24:# are empty. 0dns-up fills in the nameservers when pppd gets them from the
/etc/ppp/ip-up.d/0dns-up:26:# 'search' or 'domain' directives or additional nameservers. Read the
/etc/ppp/ip-up.d/0dns-up:77:# nameserver lines to the temp file.