The VM (Virtual Machine) operating system
An instance of Linux running under z/VM maintains its own security just as it would if it were running on a distributed system
Absolutely! Even though the mainframe itself typically lacks graphics display hardware, Linux can use the X11 network protocol to interact with a remote graphical display on another Linux or UNIX system, or on a dedicated X11 terminal
What are specific issues related to supporting Linux as a guest operating system?
What sort of things do you need to do to effectively support guest operating systems (z/OS, OS/390, VSE, Linux) in virtual machines?
SNA support is supplied by VM/VTAM.
VM NJE support is provided by VM RSCS, and supports a range of communications media, including NJE over IPv4 support.
As of z/VM 4.4, the native VM TCPIP stack does not support IPv6, and IBM has announced no plans to support IPv6 in the future
IP version 6 is not yet supported natively on VM. Linux guests provide a way to tunnel IPv6 packets via IPv4, however this support is limited and experimental.