Basic Regular Expressions
| ^abc | BOL | abc at the beginning of the line |
| abc$ | EOL | abc at the end of the line |
| A* | Any amount of characters | matches any sqec or more of A`s i.e A, AAAAAA, AA, AAAAAAAAAA |
| . | Any 1 Character | Any Character |
| .* | Any Characters | Any Characters |
| a[a-z0-9]c | Range | Between a and c any lowercase letter or number i.e a7c avc |
Rick Donato is a Network Automation Architect/Evangelist and the founder of Packet Coders.
Latest posts by Rick Donato (see all)
- How to Configure a BIND Server on Ubuntu - March 15, 2018
- What is a BGP Confederation? - March 6, 2018
- Cisco – What is BGP ORF (Outbound Route Filtering)? - March 5, 2018
Want to become a UNIX expert?
Here is our hand-picked selection of the best courses you can find online:
UNIX Administration Fundamentals
Vim Masterclass
and our recommended certification practice exams:
AlphaPrep Practice Tests - Free Trial