Ubuntu – How to make terminal start maximized?

You can use the Compiz Window Rules plugin for this.

1. Make sure you have the CompizConfig Settings Manager installed and run it.

2. Then, enable the Window Rules plugin:

   

   and set it so that windows with the class Gnome-terminal are matched:

   

If you're using a different terminal, use the + button to build up a match expression for your terminal.

If you'd like your terminal to be fullscreen instead, you can use the appropriate rule in the plugin's config dialog.

In newer versions of Ubuntu (definitely in 16.04) you need to have compiz-plugins installed package to access Window Rules.
If you don't have it you need to install it with sudo apt install compiz-plugins and reboot.

Terminal is not net application. Maybe is better to say, in your case, terminal is container for net application like ssh, telnet, lftp, wget, lynx ...

Edit your:

sudo -H gedit /etc/profile.d/proxy.sh

Enter the details in this format.

export http_proxy=http://username:password@proxyhost:port/ 
export ftp_proxy=http://username:password@proxyhost:port/
export telnet_proxy=http://username:password@proxyhost:port/

This is for when using wget, ftp, lftp, telnet in terminal

ssh has no native SOCKS client support, you need to use a ProxyCommand for that, for instance with socat:

ssh -o ProxyCommand='socat - SOCKS4A:myproxy:%h:%p,socksuser=nobody' user@host

Or use things like tsocks to transparently use SOCKS for TCP traffic.

For SOCKS5 with socat 2:

ssh -o ProxyCommand='socat - "SOCKS5:%h:%p|tcp:myproxy:1080"' user@host

For HTTP Proxy CONNECT method with socat 2:

ssh -o ProxyCommand='socat - "PROXY:%h:%p|tcp:myproxy:80"' user@host