Ubuntu Internet access steps

Go to kitty's folder

cd /opt/clash

Run the ./cfw file

./cfw

Modify the configuration file

sudo chmod 666 /etc/environment

edit file

gedit /etc/environment

Fill in the following content and save

http_proxy=http://127.0.0.1:7890/
https_proxy=http://127.0.0.1:7890/
ftp_proxy=http://127.0.0.1:7890/
HTTP_PROXY=http://127.0.0.1:7890/
HTTPS_PROXY=http://127.0.0.1:7890/
FTP_PROXY=http://127.0.0.1:7890/

Change to original read-only status

sudo chmod 444 /etc/environment