Shell useful hacks

example.sh

# searching through files content in current directory, not in .git subdir
find . -type f -not -path ".git" -exec grep --color -Hn "hello" {} \;

# VoIP
# reciever
nc -l -p 12345 | aplay
# sender
aplay | nc 192.168.0.2 12345

# view the file while it is still updating
less +F file

# tunneling with SSH
ssh -N -L localhost:12345:REMOTE_MACHINE:12345 BRIDGE_MACHINE_USER@BRIDGE_MACHINE