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Note, as you have noticed that we can pass almost most launch_cvd’s parameters to assemble_cvd , but it is not always true that these two commands can support exact same parameters. If you want to check what’s the correct parameters for passed to assemble_cvd , you can firstly run launch_cvd and after it launching assumble_cvd is launched in the sub process, you can check the parameters for the running assumble_cvd process:

$ ps -e | grep assemble_cvd
 673381 ?        00:00:02 assemble_cvd
$  cat /proc/673381/cmdline | sed -e "s/\x00/ /g"; echo
/home/leoy/Dev2/aosp_cuttlefish_test/cf/bin/assemble_cvd --group_id=cvd_1 --report_anonymous_usage_stats=y --vm_manager=qemu_cli --webrtc_device_id=cvd_1-1 

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Same as the assemble_cvd command, it prevents we are prevent to directly run the run_cvd command. If we want to directly execute it, we can use the command:

$ true | HOME=$PWD ./bin/run_cvd 2>&1 | cat

run_cvd manages dozen of backend programs internally for emulating virtual devices (e.g. for WiFi, secure devices, etc). For the rough brief understanding of the run_cvd’s internal, you could refer to below diagram:

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