Recovering Ubuntu Boot Space Without Removing Your Recovery Path
Old kernels can fill a small boot volume, but cleanup should preserve a known-good fallback and use the package manager’s own dependency decisions.
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Random Passwords from the Shell: A Small Tool with Security Boundaries
A secure random string is useful in a lab, but generation is only one part of credential security. Here is a practical shell pattern and the limits that matter.
Bash History Is Operational Memory—and Sometimes Sensitive Data
A cleaner shell history improves retrieval, but the more important design question is what should be retained, synchronized, or removed in the first place.