Bashscript #/bin/bash IFS=' ' hi=$(find /proc -maxdepth 3 -regex '/proc/[0-9].*[0-9]/fd'); for i in $hi; do count=$(ls -la $i 2>&1 /dev/null | wc -l ); container="$container\n$count $i"; done echo -e $container | sort -n

Set configuration (e.g.) /etc/systemd/journald.conf [Journal] Storage=auto SystemMaxFileSize=100 Create directory and activate it for journald mkdir -p /var/log/journal systemd-tmpfiles --create --prefix /var/log/journal systemctl restart systemd-journald

Installation pacman -S postgrey Activate configuration cp /usr/lib/systemd/system/postgrey.service /etc/systemd/system/ Add to Postfix configuration /etc/postfix/main.cf smtpd_recipient_restrictions = check_policy_service inet:127.0.0.1:10030 Add automated whitelist /etc/systemd/system/postgrey.service ExecStart=/usr/bin/postgrey --inet=127.0.0.1:10030 \ --pidfile=/run/postgrey/postgrey.pid \ --group=postgrey --user=postgrey \ --daemonize \ --greylist-text="Greylisted for %%s seconds" \ --auto-whitelist-clients=5 systemctl deamon-reload systemctl restart postgrey

Install pacman -S postfix dovecot Add User for Maildeamon useradd -u 5000 -s /usr/bin/nologin -d /var/spool/mail/vmail/ -m vmail mkdir -p /var/spool/mail/vmail/ Postfix Create database mysql -u root -p CREATE DATABASE postfix; CREATE USER “postfix_user”@“localhost” IDENTIFIED BY “blafoo”; GRANT ALL ON postfix.* TO “postfix_user”@“localhost”; FLUSH PRIVILEGES; Create tables Virtual domains CREATE TABLE `virtual_domains` ( `id` INT NOT NULL AUTO_INCREMENT, `name` VARCHAR(50) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; Virtual users

Installation pacman -S opendkim mkdir /etc/postfix/dkim chown root:opendkim /etc/postfix/dkim -R Create config /etc/opendkim/opendkim.conf AutoRestart Yes AutoRestartRate 10/1h UMask 002 Syslog yes SyslogSuccess Yes LogWhy Yes SendReports yes SoftwareHeader yes Selector mail Canonicalization relaxed/simple ExternalIgnoreList refile:/etc/postfix/dkim/TrustedHosts InternalHosts refile:/etc/postfix/dkim/TrustedHosts KeyTable refile:/etc/postfix/dkim/KeyTable SigningTable refile:/etc/postfix/dkim/SigningTable Mode sv SignatureAlgorithm rsa-sha256 UserID opendkim:opendkim Socket inet:12301@localhost OversignHeaders From Add Dkim to Postfix /etc/postfix/main.cf # DKIM milter_default_action = accept non_smtpd_milters = inet:localhost:12301 smtpd_milters = inet:localhost:12301 Create directory for socket mkdir /var/run/opendkim chown opendkim:opendkim /var/run/opendkim