Repairs, tweaking, configuration, and builds.
Bash Scripting, cron jobs, logging, package maintenance.
Apache virtual hosting, LAMP.
wine, dosemu, Mysql / MariaDB, phpmyadmin, PHP, Dovecot email, mail utils, ssh, virtualbox vmware virtualizition, x11vnc, xrdp, libreoffice, thunderbird, pidgin, openfire chat server, sftp, jackd, linux DAWs Ardor, LMMS, kxstudio, audacity, reaper, alsa, external usb sound, pulse audio, alsa, Nextcloud / Owncloud hosting, XFCE tweaking, Ubuntu, Mint, Clonezilla, rsnapshot backups, Windows LAN backups to Linux Servers. etc.