Simple and fast variant, not using external programs. Another variation:
complete -W "$(while read line; do echo ${line%%[, ]*}; done < ~/.ssh/known_hosts)" ssh
HashKnownHosts must be off, of course.
Outputs contents of virtual hosts containing PATTERN. Particularly useful for pefrorming complex searches. E.g. search for docroot of www.example.com:
sed -n '/^[^#]*<Virtual/{:l N; /<\/Virtual/!bl;}; /www\.example\.com/p' /etc/apache2/sites-enabled/* |grep DocumentRoot
Note that "Virtual" here is case sensitive. In GNU sed you may add I (capital i) modifier for case-insensitive matching:
sed -n '/^[^#]*<Virtual/I{:l N; /<\/Virtual/I!bl;}; /PATTERN/p' ...
Binary clock with separate H:M:S. Show Sample Output
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