Some helpers for using connection via proxy in bash, when you don't want to save your credentials in standard locations (for eg. in shared PCs).

.bash_aliases

myproxy()
{
	read -p "Username: " USER
	read -s -p "Password: " PW
	echo

	hostname="proxy.example.com"
	port="3128"
	PROXY="$(jq -rn --arg x $USER '$x|@uri'):$(jq -rn --arg x $PW '$x|@uri')@$hostname:$port"

	export http_proxy="http://$PROXY"
	export https_proxy="https://$PROXY"
	export ftp_proxy="ftp://$PROXY"
	export Proxy="$http_proxy"

	export HTTP_PROXY="$http_proxy"
	export HTTPS_PROXY="$https_proxy"
	export FTP_PROXY="$ftp_proxy"

	unset USER
	unset PROXY
	unset PW

	# For checking if we connect properly.
	curl https://raw.githubusercontent.com/siddhpant/1-byte-file/main/1_byte_file
	echo
}


alias proxy-apt='sudo -E apt -o Acquire::http::proxy="$http_proxy" -o Acquire::https::proxy="$https_proxy" -o Acquire::ftp::proxy="$ftp_proxy"'

alias proxy-pip='python3.11 -m pip --proxy "$http_proxy"'

Run myproxy every time you open the terminal.