Update command-line.md

Author: yibenhuang

command-line.md

@@ -296,7 +296,7 @@ This is an example where the input is a .tex document and the output, `-o`, is a
 
 You can get quite fancy with **pandoc**, for example you can translate a whole book's worth of latex into a Word doc complete with a Word style, a bibliography via biblatex, equations, and figures. Nothing can save Word from being painful to use, but **pandoc** certainly helps.
 
-[**exa**](https://the.exa.website/) is an upgrade on the `ls` command. It is designed to be an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. Follow the instructions on the website to install it on your operating system. To replace `ls` with `exa`, you can use a terminal *alias*. There's a good guide [available here](https://ericmjl.github.io/data-science-bootstrap-notes/create-shell-command-aliases-for-your-commonly-used-commands/).
+[**eza**](https://eza.rocks/) is an upgrade on the `ls` command. It is designed to be an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. Follow the instructions on the website to install it on your operating system. To replace `ls` with `eza`, you can use a terminal *alias*. There's a good guide [available here](https://denisrasulev.medium.com/eza-the-best-ls-command-replacement-9621252323e).
 
 **nano** is a built-in text editor that runs *within* the terminal. This can be really useful if you're working on the cloud (but it's not got the rich features of a GUI-based text editor like VS Code). To open a file using **nano**, the command is `nano file.txt`. Nano displays instructions on how to navigate when it loads up but exiting is the hardest part: when you're done, hit `Ctrl+X`, then `y` to save, and then `enter` to exit.