====== sound redirection ======

===== power line font =====
[[https://github.com/eugeii/consolas-powerline-vim]]

===== receive sound via SSH =====
<code bash>
ssh <user>@<remotehost> 'arecord -f cd -t raw | oggenc - -r' | mplayer -
ssh <user>@<remotehost> ffmpeg -f alsa -ac 1 -i hw:3 -f ogg - | mplayer - -idle -demuxer ogg
</code>

===== send sound via SSH =====
<code bash>
arecord -f cd -t raw | oggenc - -r | ssh <user>@<remotehost> mplayer -
ffmpeg -f alsa -ac 1 -i hw:3 -f ogg - | ssh <user>@<remotehost> mplayer - -idle -demuxer ogg
</code>

http://unix.stackexchange.com/questions/116919/redirect-sound-microphone-via-ssh-how-to-telephone-via-ssh

====== Disable reverse dns ======
vim /etc/ssh/sshd_config
<code bash>
UseDNS no
</code>

====== Show fingerprint ======
<code bash>
ssh-keygen -lf ~/.ssh/id_rsa.pub -E md5
</code>