06-20-2019
You need to generate ssh key pairs which are longer in length.
Modern computers can "break" the crypto based on brute force (millions of attempts of various keys, for example.)
The longer the length of the key, the larger the key domain and hence the stronger the crypto.
You are being advised to generate new keys which are stronger cryptographically because the key lengths will be longer.
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ypmatch(1) General Commands Manual ypmatch(1)
NAME
ypmatch - print values of selected keys in Network Information Service map
SYNOPSIS
domain]
Remarks
The Network Information Service (NIS) was formerly known as Yellow Pages (YP). Although the name has changed, the functionality of the
service remains the same.
DESCRIPTION
prints the values associated with one or more keys in a Network Information Service (NIS) map specified by mname. The mname can be either
a mapname or a map nickname. A map nickname is a synonym by which a NIS map can be referenced.
If multiple keys are specified, the same map is searched for an occurrence of each key. A match is made only when the case and length of a
key is the same as that stored in the database. No pattern matching is available. If a key is not matched, a diagnostic message is pro-
duced.
Options
recognizes the following command-line options:
Before printing the value associated with a key,
print the key followed by a colon This option is useful if the keys are not part of the values (as in a map), or so many
keys were specified that the output could be confusing.
Inhibit the translation of a map's
nickname to its corresponding mapname. For example, fails because there is no map named whereas, is translated to
Specify a
domain other than the default domain, that is, the one returned by (see domainname(1)).
Display the
nickname for each NIS map.
AUTHOR
was developed by Sun Microsystems, Inc.
SEE ALSO
domainname(1), ypcat(1), ypserv(1M), ypfiles(4).
ypmatch(1)