S390/z/VM tips and tricks

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These are some tips and tricks that are useful for z/VM.

CMS

COMMAND DESCRIPTION EXAMPLE
LISTFILES List files
FILELIST another list files, interactive
QUERY ARGS Query general VM state
Q ARGS Shortcut to the QUERY command
Q CPUS List allocated cpus
Q STORAGE List allocated memory
Q DASD List allocated disks
Q DISK List attached disks
Q ACCESSED List disks available under CP/CMS
Q OSA List allocated network devices
Q READER ALL Show all queued files in the reader spool queue
ERASE Erases files ERASE FILENAME DISK
COPY Copies files FIXME!
RENAME Renames files FIXME!

CP

COMMAND DESCRIPTION EXAMPLE
DISCONNECT Disconnect from the current VM, but leave the VM running
LOGOFF Shut the current VM off
IPL Restart the VM and launch the Initial Program Loader (i.e. the bootloader)
I Shortcut for the IPL command
IPL NUMBER Restart the VM and IPL a specific image IPL 150
IPL CMS Restart the VM and launch CMS
VI VMSG NUMBER ARGS After launching the IPL, select NUMBER and append ARGS to the program's command line
(e.g. the Linux kernel's command line)
VI VMSG 0 init=/bin/bb
CP SET RUN ON Maintain VM running when disconnecting from z/VM

Linux

To run CP commands from Linux while in the x3270 session, type: #CP COMMAND, e.g. #CP SYSTEM CLEAR. This would stop the VM.

References