2000
Best practice
Informational
See if you can use ${#variable} instead.
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Shell rules
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2003
Best practice
Informational
expr is antiquated. Consider rewriting this using $((..))
2006
Best practice
Informational
Use $(...) notation instead of legacy backticked `...`.
2196
Best practice
Informational
egrep is non-standard and deprecated. Use grep -E instead.