copying directories between servers compressed
How to efficiently copy and compress directories between servers using tar and SSH pipes.
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Find Out My Linux Distribution Name and Version
How to identify which Linux distribution and version you are running using terminal commands like lsb_release.
bash history
Tips for searching and using the Bash shell history interactively to improve command-line productivity.
Flushing the DNS cache on a Mac (OS X), Linux and Windows
Commands to flush the DNS cache on various versions of macOS (OS X), Linux, and Windows systems.
Test Credit Card Numbers
A reference list of valid credit card numbers for testing payment gateway integrations (Visa, MasterCard, Amex).
Global GIT ignore files
How to configure a global gitignore file to exclude .DS_Store and other system files on macOS.
Useful Unix find commands
A collection of useful Unix 'find' command one-liners for locating files by size, date, and type.
Setting up SSH access without a password?
A guide to generating SSH keys and configuring passwordless authentication between servers.