bsd netbsd virtualization php webdevelopment dotfiles git applemacosx versioncontrol ssh unix sysadmin xterm font unicode utf8 x11 fontconfig locale howto c programming freebsd zfs bhyve graphviz graph visualization diagram docker sendmail mailserver email xorg cli terminal vm java rhel linux oneliner sed shell script plaintext text plantuml tex latex documentation tutorial ruby github rs232serial console server hardware qemu kvm perl snapshot backup hpc automation configmanagement networking centos wm systemd smtp mta reference wiki webbrowser web tool markdown pdf writing technicalwriting staticsitegenerator notebook diary journal knowledge projectmanagement software coding opensource ansi ascii it computing history productivity gtd jail container