cp /tmp/putty.msi .
scp -P 8080 cpfong@www.ifong.org:~/putty.msi .

tmux list-sessions
tmux list-windows

cat ~/bin/tmuxattach.sh
tmuxa<TAB>
create a new window at tmux Ctrl-A + c 
exit to exit this window
change window label (name) tmux Ctrl-A ,
cat ~/.ssh/config
ssh testfoo
to become root: sudo su
switch between windows tmux Ctrl-A number

# vi /etc/rc.conf       #take effect after reboot
hostname your-new-name  #right away
hostname                #ask my host name

copy file from Teacher to AWS
scp fileName.txt testfoo:

install a package
pkg search node | grep -E '^node'
pkg install -y node22
find out ALL packages on system  pkg info

telnet 127.0.0.1 6403 test 6403 port open or not
Ctrl+] to break
telnet> quit


node ./04createServer.js