Learn how to generate UUIDs with uuidgen on Linux. Covers random, time-based, and namespace UUIDs with practical shell scripting examples.

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A comprehensive guide to generating UUIDs on Linux using the uuidgen command. Covers all four UUID versions: Version 1 (time-based, encodes MAC address), Version 3 (MD5 namespace hash), Version 4 (random, default), and Version 5 (SHA-1 namespace hash). Explains installation on Debian/Ubuntu (uuid-runtime) and RHEL/Fedora (util-linux), practical shell scripting patterns including loops, command substitution, and filename generation. Also covers alternative methods like reading from /proc/sys/kernel/random/uuid and Python's uuid module. Includes a comparison table of all methods with RFC 4122 compliance notes and guidance on choosing the right UUID version for database keys, distributed systems, and idempotent operations.

Generate UUIDs with uuidgen on Linux

Generating Namespace-Based UUIDs (Version 3 and Version 5)

Alternative Methods to Generate UUIDs on Linux