How to open the AVD manager on Ubuntu Linux from the command line?
I created shortcut with this command
/path/to/Android/emulator/emulator -avd Nexus_5X_API_26
Where "Nexus_5X_API_26" is my virtual device I created in Android Studio (2.3.3). Correct name can be checked from ~/.android/avd/ folder, where are one subfolder (with extension .avd) and one file (with extension .ini) for each. There are qcow2 files which I think could be also run directly with qemu (have not tested yet).