Grep multiple patterns

 

Grep will support pattern matching.

Example:

To grep b to f from string abcdefghijklmnopqrstuvwxyz using following example:

$ echo "abcdefghijklmnopqrstuvwxyz" | grep -P -o "b.*?f"

Output:

bcdef

With grep we can also match multiple patterns with a single expression. Lets try to print two patterns b to f and p to v by using following example:

$ echo "abcdefghijklmnopqrstuvwxyz" | grep -P -o "(b.*?f)|(p.*?v)"

Output:

bcdef
pqrstuv

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