Update 01_setting_up.md

formatting

new_basic_shell/01_setting_up.md

@@ -10,16 +10,16 @@ author: "Sheldon McKay, Mary Piper, Radhika Khetani, Emma Berdan"
 
 ## What even is shell?
 
-You have likely heard the words bash, shell, unix, and linux before but may not know what they mean or how they relate. Before we even access the shell let's try to understand these terms.
+You have likely heard the words **bash**, **shell**, **unix**, and **linux** before but may not know what they mean or how they relate. Before we even access the shell let's try to understand these terms.
 
-* Unix is simply an operating system much like Windows or macOS. Unix and its "flavors" are the operating systems you find on high perfomance computing clusters. 
-* Linux can be thought of as a clone or "flavor" of unix. The main difference between unix and linux is that unix is proprietary (i.e. requires a license) while linux is open source.
+* **Unix** is simply an operating system much like Windows or macOS. **Unix** and its "flavors" are the operating systems you find on high perfomance computing clusters (HPCs). 
+* **Linux** can be thought of as a clone or "flavor" of **unix**. The main difference between **unix** and **linux** is that **unix** is proprietary (i.e. requires a license) while **linux** is open source.
 
   ![Foxtrot by Bill Amend](img/open_sores.png)
   *Foxtrot by Bill Amend*
 
-* Shell is a general term for a command line interpreter, a program that lets users control their operating system with text commands. Shell has been described as user-facing “shell around the computer’s whirring innards” ([Louis Pouzin](https://en.wikipedia.org/wiki/Louis_Pouzin))
-* Since shell is a general term, there are many different shells. The most prevalent is bash which is short for "Bourne-Again SHell" which replaced the original Bourne shell that was NOT developed by [Jason Bourne](https://en.wikipedia.org/wiki/Jason_Bourne) but by [Stephen Bourne](https://en.wikipedia.org/wiki/Stephen_R._Bourne) a programmer at Bell labs. 
+* **Shell** is a general term for a command line interpreter, a program that lets users control their operating system with text commands. **Shell** has been described as user-facing “**shell** around the computer’s whirring innards” ([Louis Pouzin](https://en.wikipedia.org/wiki/Louis_Pouzin))
+* Since **shell** is a general term, there are many different **shells**. The most prevalent is **bash** which is short for "Bourne-Again SHell" which replaced the original Bourne shell that was NOT developed by [Jason Bourne](https://en.wikipedia.org/wiki/Jason_Bourne) but by [Stephen Bourne](https://en.wikipedia.org/wiki/Stephen_R._Bourne) a programmer at Bell labs. 
 
 ## Starting with the shell