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linux module updates

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course/content/operating-systems/linux/introduction/README.md
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@ -90,7 +90,7 @@ sudo userdel -r bob
### List users
User information in Linux is stored in the `passwd` file which exists in the `/etc` directly
User information in Linux is stored in the `passwd` file which exists in the `/etc` directory
View the content of the file with the `cat` command
@ -105,6 +105,8 @@ Another useful command to see who we are logged in as, is the `whoami` command
In order to navigate around, we will learn a couple of commands to navigate, but we also need to know what we are navigating </br>
* `ls` is a command we use to list contents in a directory. `/` id the root directory in Linux, which is the equivalent of `C:\` in Windows. Type `ls /` in the terminal to list out contents in the `/` root directory.
`ls -l` helps us return a "list" format so we can see type of files\folders and permissions on those.
'ls -a' helps us view hidden folders. In Linux, folders starting with a `.` is hidden. Just like the `.git` folders we saw in the previous chapter when working on GIT.
* <b>Home directories:</b> Under the `/` directory you will see a directory called `/root` which is the `$HOME` directory of the root user. </br> All other user folders are under `/home` </br>
The `~` also represents the full path to the home directory for your current user