Protobuf offers better data serialization & speed than JSON. It's perfect for mobile apps, real-time systems & gaming, with benefits like binary encoding, schema evolution & cross-language compatibility.

Setting up an Nginx reverse proxy is easy: configure it to handle all incoming traffic on ports 80/443, then route it to backend servers. This keeps them secure & handles SSL/TLS encryption & load balancing.

Bash script generates all possible permutations of characters from a given charset (0-9, a-z, A-Z). Uses recursion to build permutations. Usage: `permute 2` outputs all 2-character combinations.

Disable spindown on Linux: `hdparm -S 0 /dev/sdX` (replace X with HDD device) to prevent latency spikes & reduce wear on hard drives in busy environments.

Bash script generates permutations of characters from charset (0-9, a-z, A-Z). Function `permute` recursively appends each character to the permutation. Usage: `permute 2` outputs all possible 2-character combinations.

Disable spindown on Linux: `hdparm -S 0 /dev/sdX` (replace X with HDD device) to prevent latency spikes & reduce wear on hard drives in busy environments.