rebaseall: only ash or dash processes are allowed during rebasing
Exit all Cygwin processes and stop all Cygwin services.
Execute ash (or dash) from Start/Run... or a cmd or command window.
Execute '/bin/rebaseall' from ash (or dash).

打开任务管理器，找到3个进程

把ssh这个进程干掉，再去ash中执行/bin/rebaseall就可以了