adb-kill-server

Stop the adb server

$ adb kill-server

$ adb kill-server && adb start-server

adb kill-server

adb kill-server terminates the running adb server process on your computer. The adb server is a background process that manages communication between adb clients and connected devices.
Killing the server is useful when troubleshooting connection issues, freeing up USB resources, or when the server becomes unresponsive. The server automatically restarts when you run any adb command.

All active adb connections are terminated when the server is killed. Any port forwards, reverse forwards, and wireless connections will be lost. Running adb commands after this will automatically start a new server.

The client-server architecture of adb has been part of the Android SDK since its initial release in 2008. The kill-server command provides a way to reset the server when troubleshooting issues.

adb(1), adb-start-server(1), adb-devices(1)