For tor daemon running on Ubuntu, first try this:

killall -HUP tor

If that does not work, enable the control port in your torrc file.

Then, set a password for the control port with tor --hash-password password

Open a telnet connection to the control port and issue the NEWNYM command:

printf 'AUTHENTICATE "password"

SIGNAL NEWNYM

' | nc 127.0.0.1 9051

sources:

• SuperUser: How do I tell tor, from the command-line, to give me a new identity in a Mac?


• Stack Overflow: How to request new TOR identity in terminal


• SuperUser: How to “flush tor circuit”