a2query è un programma che ci permette di ottenere informazioni sulla configurazione di Apache.

Sulla mia Debian me lo sono trovato già installato insieme al server; suppongo valga per tutti.

Detto ciò, vediamo qualche esempio.

Recuperare i moduli attivi:

# a2query -m
access_compat (enabled by maintainer script)
authn_file (enabled by maintainer script)
status (enabled by maintainer script)
proxy (enabled by site administrator)
autoindex (enabled by maintainer script)
ssl (enabled by site administrator)
filter (enabled by maintainer script)
rewrite (enabled by site administrator)
authz_core (enabled by maintainer script)
negotiation (enabled by maintainer script)
reqtimeout (enabled by maintainer script)
authn_core (enabled by maintainer script)
dir (enabled by maintainer script)
deflate (enabled by maintainer script)
socache_shmcb (enabled by site administrator)
mime (enabled by maintainer script)
php7.3 (enabled by site administrator)
setenvif (enabled by maintainer script)
proxy_http (enabled by site administrator)
auth_basic (enabled by maintainer script)
env (enabled by maintainer script)
authz_user (enabled by maintainer script)
http2 (enabled by site administrator)
authz_host (enabled by maintainer script)
alias (enabled by maintainer script)
mpm_prefork (enabled by maintainer script)

Recuperare i virtual hosts:

# a2query -s
default-ssl (enabled by unknown)
000-default (enabled by site administrator)

Visualizzare i moduli multi-processo attivi:

# a2query -M
prefork

Visualizzare la versione di Apache:

# a2query -v
2.4.38

Enjoy!