Record this error encountered while creating the application
What I want to solve
do rails s
Address already in use-bind(2) for "127.0.0.1" port 3000 (Errno::EADDRINUSE)
I can not run rails s because it is displayed in the terminal
Check if rails s is already running on another terminal.
If you can’t see that rails s is running
% ps ax | grep rails
Enter the process number that came out
% Kill -9 process number
It can be solved by stopping the process with.