Ubuntu 21.04 Server: Administration and Reference

This book is designed as an Ubuntu 21.04 Server administration and reference source covering the Ubuntu servers and their support applications. Server tools are covered as well as the underlying configuration files and system implementations. The emphasis is on what administrators will need to know to perform key server support and management tasks. Coverage of the systemd service management system is integrated into the book. Topics covered include software management systemd service management AppArmor security OpenSSH the Chrony time server and Ubuntu cloud services. Key servers are examined including Web FTP CUPS printing NFS and Samba Windows shares. Network support servers and applications covered include the Squid proxy server the Domain Name System (BIND) server DHCP distributed network file systems IPtables firewalls and cloud computing.