[HN Gopher] Virtual Machine Administration Using QEMU Monitor
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       Virtual Machine Administration Using QEMU Monitor
        
       Author : whereistimbo
       Score  : 28 points
       Date   : 2024-04-25 20:38 UTC (2 hours ago)
        
 (HTM) web link (documentation.suse.com)
 (TXT) w3m dump (documentation.suse.com)
        
       | sunday_serif wrote:
       | I was so pleased when I finally discovered the QEMU Monitor.
       | 
       | It is an excellent tool that covers a lot of the gaps in the QEMU
       | documentation.
       | 
       | Curious which devices are memory mapped to which regions on your
       | virtual board and the docs aren't specific? Check the device info
       | in the monitor!
       | 
       | Want to know what interrupt signals a device might generate and
       | can't find that info in the docs, use the monitor to check!
       | 
       | It's honestly a life saver.
       | 
       | A cool tip I recently found to make using the Monitor easier when
       | you are running your QEMU machine in nographic mode is that you
       | can have QEMU read and write the monitor to a file on your
       | system. Then you can use a tool like socat to have one terminal
       | running your QEMU machine and another running your monitor! Super
       | convenient.
       | 
       | This stack exchange answer explains the details:
       | 
       | https://unix.stackexchange.com/questions/426652/connect-to-r...
        
       | malux85 wrote:
       | QEMU monitor is a really unappreciated little gem.
       | 
       | I have a bunch of helper scripts that create / restore machine
       | snapshots - then I run Jupyter server inside the VM and use
       | create / restore as a time travelling debugger
        
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       (page generated 2024-04-25 23:00 UTC)