Output of

result_of_command_execution

# Server is listening on port #45000
$ ss -tan | grep :45000
LISTEN   0     1        10.20.1.1:45000        *:*

# A client connects to the server using it's source port 54762. A new
# socket is created and is seen in ESTABLISHED state, along with the
# earlier LISTEN socket.
$ ss -tan | grep :45000
LISTEN     0     1      10.20.1.1:45000        *:*
ESTAB      0     0      10.20.1.1:45000        10.20.1.100:54762

# Kill the server application.
$ pkill -9 my_server

# Restart the server application.
$ ./my_server 45000
bind: Address already in use

# Find out why
$ ss -tan | grep :45000
TIME-WAIT  0     0      10.20.1.1:45000        10.20.1.100:54762