tips

• • OSI model
  • How the web works: HTTP and CGI explained
  • IPtables frequently used rules
  • Unix Signals
  • PostgreSQL useful commands
  • The System Design Primer
  • Pyhton3 memo
  • Connect to the server behind bastino with key forward ssh -o ProxyCommand=’ssh -W %h:%p user@xxx.xxx.xxx.xxx -i ~/.ssh/key.pem’ -i ~/.ssh/tools-mgt.pem user@yyy.yyy.yyy.yyy xxx.xxx.xxx.xxx – bastion server IP, yyy.yyy.yyy.yyy – server IP