Python math Module: Functions and Constants Explained
Python math module guide: constants, ceil and floor, square roots, logs, isclose, fsum, and integer math, with tested examples and the gotchas to avoid.
Paul Hill
15 min
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AWS Cloud Practitioner: CLF-C02 Exam Guide and Study Plan
AWS Cloud Practitioner guide: the CLF-C02 exam format, US$100 cost, 700 passing score, four domain weights, retake rules, and a study plan for beginners.
Paul Hill
11 min
Linux cut Command: Extract Columns and Fields
cut command guide: extract columns and fields from CSV, /etc/passwd, and logs with -d, -f, and -c, plus bash string splitting and the gotchas to avoid.
Paul Hill
13 min
CCNP Certification: Exams, Cost, and Which Track to Pick
CCNP certification guide: how the core and concentration exams work, US$700 in exam fees, all current tracks, the 2026 wireless split, and recertification.
Paul Hill
13 min
Linux ls Command: List Files and Directories
The ls command lists files and directories in Linux. Learn ls -l, ls -la, ls -lh, sort by date with ls -ltr, and read every column of the long listing output.
Paul Hill
16 min
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