07-09-2011
Hi.
Using grep on the /etc/hosts file would provide advantages:
1) Not restricted to zsh,
2) Need not recall the beginning of the host string, only a unique segment,
3) Same technique could be used for any utility that looks up hosts,
Some scripting to diagnose no matches or too many matches could be useful.
Disadvantages -- for a simple script you may need to execute more than once if you make a mistake.
Best wishes ... cheers, drl
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HOSTS(5) BSD File Formats Manual HOSTS(5)
NAME
hosts -- host name data base
DESCRIPTION
The hosts file contains information regarding the known hosts on the network. For each host a single line should be present with the follow-
ing information:
Internet address
Official host name
Aliases
Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of
the line are not interpreted by routines which search the file.
Network addresses may either be specified for IP version 4 or version 6. IP version 4 addresses are specified in the conventional dotted
address notation. IP version 6 addresses are specified using the colon-separated notation described in RFC1924.
Host names may contain any printable character other than a field delimiter, newline, or comment character.
The hosts file is read by mDNSResponder(8) and used to supply results for calls to getaddrinfo(3), getnameinfo(3), etc. in addition to
results obtained from multicast and unicast DNS.
FILES
/etc/hosts
SEE ALSO
gethostent(3), getipnodebyname(3), getaddrinfo(3), getnameinfo(3)
RFC1924: A Compact Representation of IPv6 Addresses.
HISTORY
The hosts file format appeared in 4.2BSD.
4.2 Berkeley Distribution December 11, 1993 4.2 Berkeley Distribution