Service Cheatsheets

Quick links to the seven service guides that match the 10–16 block in the foundations path (Chrony through Apache). Use this page when you want a hub into those full guides, not a flat index of every command list on the site.

How this differs from the cheatsheet index: the cheatsheet index lists all SysRef sections that are structured as look-up cheatsheets (including networking, security, and deep dives), ordered for scanning. Service cheatsheets (this page) is only the service vertical — the same seven hosts as items 10–16 on Start Here — so you can jump straight without hunting through a long master list. For a guided first pass through 01–18, start from Start Here: foundations.

Access: from any page, Ctrl+K / Cmd+K or / opens site search to jump by title (keyboard-first wayfinding; pair with the sidebar and site map).

10

Chrony

Time sync. Why time matters, config, chronyc commands, service checks.
11

Rsyslog

Log handling and forwarding. Config, facilities, severities, TCP/UDP forward.
12

Postfix

Mail transfer. main.cf, relay, queue, postconf, postfix check.
13

Dovecot

IMAP/POP3 and mailbox access. doveconf, doveadm, service checks.
14

Squid

Forward proxy. What a proxy is, ACL rules, access/cache logs.
15

Nginx

Web server and reverse proxy. Server blocks, nginx -t, reload.
16

Apache

Web server. VirtualHosts, apachectl configtest, apachectl -S.