📦 Installation Command
apt install memcached libmemcached-tools
Memcached Default Port & Configuration
memcached systemctl: memcachedHigh-performance distributed memory caching system. Simple key-value store, no persistence.
🔌 Default Ports
11211
tcp
Memcached protocol
11211
udp
Memcached UDP (disabled by default)
⚙️ Configuration Files
/etc/memcached.conf
📂 Default Directories
- config:
/etc/memcached.conf - data:
N/A (memory only) - logs:
/var/log/memcached.log - socket:
/var/run/memcached/memcached.sock (if configured)
🔐 Default Credentials
Username:N/A (no auth by default)
Password:N/A (no auth by default)
💡 No built-in authentication! Use SASL: apt install libmemcached-tools sasl2-bin, then configure SASL
📌 Dependencies
⚠️ Conflicts
✅ Works With
🛡️ Security Notes
Bind to localhost ONLY (never expose to internet), disable UDP, use SASL auth if remote access needed, firewall the port
❓ Frequently Asked Questions
What port does Memcached use?
Memcached uses port 11211 by default.
Memcached vs Redis?
Redis offers more features (persistence, data types). Memcached is simpler and faster for basic caching.
How to secure Memcached?
Bind to localhost (-l 127.0.0.1) and use firewall. Memcached has no built-in authentication.