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)
- NETCONF & YANG: Automate Network Configs via Python - April 2, 2026
- Palo Alto – How to Configure Your Next-Generation Firewall - April 2, 2026
- How to Harden Linux SSH: Keys, Fail2ban & Ciphers - March 1, 2026
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