diff --git a/.env.dist b/.env.dist
index 1894108..9c87a60 100644
--- a/.env.dist
+++ b/.env.dist
@@ -3,14 +3,19 @@
 #
 
 [lemper]
-# Server IP address, leave blank for auto detection.
+# Default Timezone, leave it blank or "none" for current server setting
+# Ref: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+# Example: Asia/Jakarta
+TIMEZONE=""
+
+# Server IP address, leave it blank for auto detection.
 IP_SERVER=""
 
 # Default account username.
 LEMPER_USERNAME="lemper"
 
 # Password for default lemper account,
-# leave blank for auto generated secure password.
+# leave it blank for auto generated secure password.
 LEMPER_PASSWORD=""
 
 # Administration email. Don't leave it blank!
@@ -20,7 +25,7 @@ ADMIN_EMAIL="support@lemper.sh"
 # false for manual or guided installation.
 AUTO_INSTALL=true
 
-# Cleanup existing LEMP / LAMP installation.
+# Cleanup existing LEMP / LAMP stack installation.
 AUTO_REMOVE=false
 FORCE_REMOVE=false
 
@@ -46,9 +51,9 @@ SSH_PASSWORDLESS=true
 # Your RSA Public key.
 RSA_PUB_KEY="copy your ssh public rsa key here"
 
-# Hash length (bits), supported value 2048 | 4096
+# Hash length (bits), supported value 2048 | 4096 (take too long times)
 # length of bits used for generating RSA key / Diffie-Helman params.
-HASH_LENGTH=4096
+HASH_LENGTH=2048
 
 [firewall]
 # Install iptables-based firewall (value: true | false).
@@ -63,7 +68,7 @@ FW_ENGINE="ufw"
 INSTALL_NGINX=true
 NGINX_INSTALLER="source"
 
-# Supported Nginx version: stable | latest (mainline)
+# Supported Nginx version: stable (lts) | latest (mainline)
 NGINX_VERSION="stable"
 
 # Available custom SSL version: openssl-1.1.1c | libressl-3.0.0
@@ -128,16 +133,19 @@ PHP_PHALCON_INSTALLER="repo"
 # Available Phalcon version: 3.4.4 | latest
 PHP_PHALCON_VERSION="3.4.4"
 
-PHP_PHALCON_ZEPHIR="n"
+# Phalcon zephir transpiler.
+PHP_PHALCON_ZEPHIR=false
 
 [mysql]
 INSTALL_MYSQL=true
 MYSQL_SERVER="mariadb"
 MYSQL_VERSION="10.4"
 
-#MYSQL_ROOT_PASS=""
-#MARIABACKUP_USER="lemperdb"
-#MARIABACKUP_PASS=""
+# MariaDB backup user.
+MARIABACKUP_USER="lemperdb"
+
+# Leave it blank for auto generated secure password.
+MARIABACKUP_PASS=""
 
 [memcached]
 INSTALL_MEMCACHED=true
@@ -146,6 +154,9 @@ MEMCACHED_INSTALLER="repo"
 # Available version: 1.5.17 | latest.
 MEMCACHED_VERSION="latest"
 
+# Enable SASL authentication.
+MEMCACHED_SASL=false
+
 [mongodb]
 INSTALL_MONGODB=false
 MONGODB_VERSION="4.0"
@@ -154,13 +165,13 @@ MONGODB_VERSION="4.0"
 INSTALL_REDIS=true
 
 [certbot]
-INSTALL_CERTBOT="y"
+INSTALL_CERTBOT=true
 
 [dns]
 # TODO: Install DNS server.
 
 [mailer]
-INSTALL_MAILER=true
+INSTALL_POSTFIX=true
 
 [decorator]
 # Text colour decorator.