install it yourself as:
$ gem install ftail
command example:
$ ftail <filename> $ ftail --grep [match-word] <filename> $ ftail --grepv [invert-match-word] <filename> $ ftail --grep [word] --grepv [word] <filename> $ ftail <filename> --grep [word]
grep example:
$ tail /var/log/td-agent/td-agent_fileoutput.log 2013-02-22T12:37:01Z fluent.info {"message"=>"", "date"=>2013-02-22T12:37:00Z} 2013-02-22T12:37:02Z fluent.info {"message"=>"", "date"=>2013-02-22T12:37:01Z} $ ftail /var/log/td-agent/td-agent_fileoutput.log Tailing /var/log/td-agent/td-agent_fileoutput.log 2013-02-22T12:37:01Z fluent.info {"message"=>"", "date"=>2013-02-22T12:37:00Z} ---------------------------------------------------------------------------------------------------------------------------------------- 2013-02-22T12:37:02Z fluent.info {"message"=>"", "date"=>2013-02-22T12:37:01Z} ----------------------------------------------------------------------------------------------------------------------------------------