Ny tool for setting up proxy with pac file

I think pretty much all linux/unix software that uses networking will honor the http_proxy and ftp_proxy environment variables. Depending on how your distribution is set up, /etc/environment will exist and be read by default by login shells.

You can add a line saying

http_proxy=123.45.67.89:1011

in /etc/environment easily enough, but changes in that file will only take hold the next time you start a shell process -- and only in that shell process. I don't think you can modify global variables in a shell other than your current one.

The following is for general proxy, apt and wget and you can remove the user:password@ for a proxy that doesn't require it:

For General proxy:

touch /etc/profile.d/proxy.sh

add the following:

export ftp_proxy=ftp://user:password@host:port
export http_proxy=http://user:password@host:port
export https_proxy=https://user:password@host:port
export socks_proxy=https://user:password@host:port

For APT proxy:

touch /etc/apt/apt.conf.d/99HttpProxy

add the following:

Acquire::http::Proxy "http://user:password@host:port";

For wget:

nano /etc/wgetrc 

find and uncomment proxy lines or add them if not present

http_proxy = http://user:password@host:port
https_proxy = ...
...