Linux Security
Linux Permissions and ACLs for Shared Hosting
Linux permissions and ACLs for shared hosting
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Linux Security
Practical Linux Security guides from East4Serv.
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Linux Security
Rotate SSH Keys Without Locking Out Your Team
SSH key rotation is a controlled change to the set of public keys that can authenticate to a server. It is not completed when a new key is generated: the new path must work, old ke...
Linux Security
Linux Firewall Security with nftables, UFW and Fail2ban
Linux firewalling controls which network packets may reach a host. UFW is a convenient Ubuntu frontend, nftables is the modern kernel packet-filtering framework, and Fail2ban reacts to...
Linux Security
Debian 12 Server Hardening: A Practical Security Checklist
Debian 12 hardening begins with knowing what the server actually runs and who can administer it. A checklist is useful only when each control has an owner and a validation step. A harde...
Linux Security
How to Secure an Ubuntu 24.04 Server After Installation
The first hour after an Ubuntu 24.04 server is provisioned is a good time to establish a recoverable security baseline. Hardening is not one magic command: it is a sequence of access, p...