Regular Expressions

Useful RegEx

Matches	Expression
IP Address	^\b((25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)\.){3}(25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)\b
Hostname (no domain)	\A(\w|-)+

Random Examples

• Filename
  • \d{4}-[A-Za-z]{3}-Week\d{1}.log
  • Example matches...
    • 2010-Feb-Week4.log
    • 2009-Dec-Week2.log
    • 1234-aBc-Week0.log