Ravi Sir's Cards › AWS
[ ] vs [[ ]]
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
![[ ] vs [[ ]]: POSIX, quote everything.; Bash, safer word handling.](/aws/ravi-sirs-cards/cards/en/cmp-lx7-test-vs-dbl.webp)
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What this card says
Test
[ ]
POSIX, quote everything.
[[ ]]
Bash, safer word handling.
Key points
No patterns.
Glob and regex match.
Example
[ -f "$f" ]
Use when
sh scripts.
bash scripts.