A shell script to run command behind the proxy.

proxy.sh

#!/usr/bin/env bash

# 0. (Optional) Rename this script name to "proxy"
# 1. Replace the <protocol>, <ip> and <port> to the actual value of your proxy respectively.
# 2. Run this command `sudo chmod +x <path to proxy>` to make sure this script is executable.
# 3. Add this script path to the PATH environment variable.
# 4. Run your actual command like this: `proxy ping www.google.com`.

PROXY="<protocol>://<ip>:<port>"
export ALL_PROXY=$PROXY
export HTTP_PROXY=$PROXY
export HTTPS_PROXY=$PROXY
export SOCKS_PROXY=$PROXY
export FTP_PROXY=$PROXY
export TELNET_PROXY=$PROXY
export RSYNC_PROXY=$PROXY
("${@}")
unset ALL_PROXY
unset HTTP_PROXY
unset HTTPS_PROXY
unset SOCKS_PROXY
unset FTP_PROXY
unset TELNET_PROXY
unset RSYNC_PROXY

good