SSH: login without password

ssh-keygen -R remote-host ssh-keygen -R 1.2.3.4 ssh-keygen ssh-copy-id -i ~/.ssh/id_rsa.pub user@remote-host ssh user@remote-host chmod -cv 700 ~ chmod -cv 700 ~/.ssh chmod -cv 600 ~/.ssh/authorized_keys

Debuggex: Online visual regex tester. JavaScript, Python, and PCRE

Test your regex by visualizing it with a live editor. JavaScript, Python, and PCR https://www.debuggex.com/ http://regex.larsolavtorvik.com/