Tech Life Hacks

Port Forwarding Using SSH

Sometimes we are faced with the following situation:

graph LR
  A(Computer A)-->|SSH|B(Server A 192.168.1.3)
  B-->|has access via 192.168.1.2:80|C(Server B 192.168.1.2)
  A-->|does not have access|C

Computer A is the computer that we can operate on, and through SSH, we can access Server A. Server A has access to Server B by a GUI web server running on Server B 's port 80. Theoretically we can have access to Server B, but since SSH does not a GUI, its's difficult to do so.

The ideal way of tacking this situation is somehow forwarding the 80 port on Server B to a port on our local computer. By doing so, we can have access to Server B by visiting the URL in our browser as if we are operating Server A.

SSH provides a function called port forwarding to do the exact job.

ssh -L 3311:192.168.1.2:80 [email protected]

This command forward the port at 192.168.1.2:80 to localhost:3311.

Life Saver When Fixing Someone's Internet

How to get MAC address?

Method 1. On Windows, open terminal and type in getmac -V

Method 2. On Windows, open terminal and type in ipconfig -all, this command can also give out the DNS server being used.

Method 3. On Windows11 only, right click the network button on the button right corner and select Network and Internet settings, then click the network adapter you want to check MAC address for and it will show all the information.

Deal with Windows11 Start Menu Search Not Working

Use Task Manager to restart Windows Explorer.

PowerToys | Powerful Windows Toolbox

Find it in Microsoft Store.

Win + Number | Open Taskbar Apps

e.g. Win+1

Ctrl+D | Detach from Something

Using this shortcut keys, users can detach from various things. Such as:

  • ssh connection, basically replacing the command exit
  • screen in linux. Though Ctrl+D is not enough, you should use Ctrl+A+D

Oh My Posh | A Theme Engine for Any Shell

Docs

Jump to the Installation part and do according to the docs based on your OS.

Then, read the Prompt part and setup the terminal profile.

Restart the terminal and you should be ready to enjoy the beautiful terminal.

Personally, I use theme atomic on my Windows machine and thecyberden on my linux servers.

Also, Nerd Fonts are recommended. Check out this site to install them.

Personally, I use FuraCode Nerd Font Retina in any editor and FiraCode Nerd Font Retina in any terminal. This is because FuraCode is thinner than FiraCode and thus can make the code looks compact while FiraCode has better Nerd Pattern display.

Transfer SSH keys to a New Computer (Windows)

If you purchased a new computer and still want to use the ssh keys on the old computer to log in to your server. Just copy the .ssh folder under C:\User\yourUserName in the old computer to the exact path in the new computer. Simple.

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