Lessons
Bash · Expert
Bash · Expert. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
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Lesson 1 · On the house
nounset + defaults
${var:-}
Lesson 2
indirect expansion
${!name}
Lesson 3
FD juggling
exec redirects.
Lesson 4
security: quoting
Word splitting landmines.
Lesson 5
security: injection
Don't eval user input.
Lesson 6
performance
Builtins vs externals.
Lesson 7
namespaces / subshells
( ) vs { }.
Lesson 8
DEBUG trap / xtrace
Tracing execution.
Lesson 9
completions sketch
compgen / complete.
Lesson 10
Expert capstone
Tempdir with trap.
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