Check if a string represents a valid number.
Code
General[[ "$str" =~ ^-?[0-9]*\.?[0-9]+$ ]] && echo "true" || echo "false"Parameters
The string to check
Server
More Bash Snippets
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Check if a password meets strength requirements (8+ chars, uppercase, lowercase, number, special).
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Is Alphanumeric
Check if a string contains only letters and numbers.
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Check if a value is empty.
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Check if a string is a valid email address.
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Check if a string is a valid hex color code.