Install Shadowsocks proxy on Debian or Ubuntu

Server:

• Install:
  sudo apt install shadowsocks-libev
• Restore config from backup if you have one:
  sudo cp -a backup/etc/shadowsocks-libev /etc
  or just:

  sudo tee /etc/shadowsocks-libev/config.json << EOF
  {
      "server":"0.0.0.0",
      "server_port":8388,
      "local_port":1080,
      "password":"<password>",
      "timeout":60,
      "method":"chacha20-ietf-poly1305"
  }
  EOF
  

• Disable server localhost access from clients:
  sudo sed -i -e 's|^DAEMON_ARGS=.*|DAEMON_ARGS="-u --acl acl/server_block_local.acl"|' /etc/default/shadowsocks-libev
• Restart:
  sudo systemctl restart shadowsocks-libev

Client:

• Install:
  sudo apt install shadowsocks-libev
• Disable server:
  sudo systemctl disable --now shadowsocks-libev
• Copy server config to /etc/shadowsocks-libev/<server name>.json, change server to server address, add local_address (usually 127.0.0.1), or just:

  sudo tee /etc/shadowsocks-libev/<server name>.json << EOF
  {
      "server":"<server address>",
      "server_port":8388,
      "local_address":"127.0.0.1",
      "local_port":1080,
      "password":"<password>",
      "timeout":60,
      "method":"chacha20-ietf-poly1305"
  }
  EOF
  

• Enable client service:
  sudo systemctl enable --now shadowsocks-libev-local@<server name>