luyện

Practice until you can't make it wrong.

Example: Join server named WSUS to ipractice domain

netdom join wsus /domain:ipractice /UserD:install1 /PasswordD:*

Using Powershell to join server named EX1 to ipractice domain

Add-Computer -NewName EX1 -Domain ipractice -Credential ipractice\install1 -Restart

"John the Ripper is an Open Source password security auditing and password recovery tool available for many operating systems."

sudo, sudoedit — execute a command as another user

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Everything is practice.

— Pelé