Moving Around Fixes and Updates (nushell#1672)

* Moving Around Fixes and Updates

* Fix title case

* Updates from review comments

Author: NotTheDr01ds

book/moving_around.md

@@ -1,16 +1,28 @@
-# Moving around the System
+# Moving Around the System
 
 A defining characteristic of a shell is the ability to navigate and interact with the filesystem. Nushell is, of course, no exception. Here are some common commands you might use when interacting with the filesystem:
 
 ## Viewing Directory Contents
 
-@[code](@snippets/moving_around/ls_example.sh)
+```nu
+ls
+```
 
-As seen in other chapters, the [`ls`](/commands/docs/ls.md) command returns the contents of a directory. Nushell's `ls` will return the contents as a [table](types_of_data.html#tables).
+As seen in the Quick Tour, the [`ls`](/commands/docs/ls.md) command returns the contents of a directory. Nushell's `ls` will return the contents as a [table](types_of_data.html#tables).
 
 The [`ls`](/commands/docs/ls.md) command also takes an optional argument to change what you'd like to view. For example, we can list the files that end in ".md"
 
-@[code](@snippets/moving_around/ls_shallow_glob_example.sh)
+```nu
+ls *.md
+# => ╭───┬────────────────────┬──────┬──────────┬──────────────╮
+# => │ # │        name        │ type │   size   │   modified   │
+# => ├───┼────────────────────┼──────┼──────────┼──────────────┤
+# => │ 0 │ CODE_OF_CONDUCT.md │ file │  3.4 KiB │ 9 months ago │
+# => │ 1 │ CONTRIBUTING.md    │ file │ 11.0 KiB │ 5 months ago │
+# => │ 2 │ README.md          │ file │ 12.0 KiB │ 6 days ago   │
+# => │ 3 │ SECURITY.md        │ file │  2.6 KiB │ 2 months ago │
+# => ╰───┴────────────────────┴──────┴──────────┴──────────────╯
+```
 
 ## Glob Patterns (wildcards)
 
@@ -21,21 +33,21 @@ The most general glob is `*`, which will match all paths. More often, you'll see
 Nushell also supports a double `*` which will traverse paths that are nested inside of other directories. For example, `ls **/*` will list all the non-hidden paths nested under the current directory.
 
 ```nu
- ls **/*.md
-╭───┬───────────────────────────────┬──────┬──────────┬──────────────╮
-│ # │             name              │ type │   size   │   modified   │
-├───┼───────────────────────────────┼──────┼──────────┼──────────────┤
-│ 0 │ CODE_OF_CONDUCT.md            │ file │  3.4 KiB │ 5 months ago │
-│ 1 │ CONTRIBUTING.md               │ file │ 11.0 KiB │ a month ago  │
-│ 2 │ README.md                     │ file │ 12.0 KiB │ a month ago  │
-│ 3 │ SECURITY.md                   │ file │  2.6 KiB │ 5 hours ago  │
-│ 4 │ benches/README.md             │ file │    249 B │ 2 months ago │
-│ 5 │ crates/README.md              │ file │    795 B │ 5 months ago │
-│ 6 │ crates/nu-cli/README.md       │ file │    388 B │ 5 hours ago  │
-│ 7 │ crates/nu-cmd-base/README.md  │ file │    262 B │ 5 hours ago  │
-│ 8 │ crates/nu-cmd-extra/README.md │ file │    669 B │ 2 months ago │
-│ 9 │ crates/nu-cmd-lang/README.md  │ file │  1.5 KiB │ a month ago  │
-╰───┴───────────────────────────────┴──────┴──────────┴──────────────╯
+ls **/*.md
+# => ╭───┬───────────────────────────────┬──────┬──────────┬──────────────╮
+# => │ # │             name              │ type │   size   │   modified   │
+# => ├───┼───────────────────────────────┼──────┼──────────┼──────────────┤
+# => │ 0 │ CODE_OF_CONDUCT.md            │ file │  3.4 KiB │ 5 months ago │
+# => │ 1 │ CONTRIBUTING.md               │ file │ 11.0 KiB │ a month ago  │
+# => │ 2 │ README.md                     │ file │ 12.0 KiB │ a month ago  │
+# => │ 3 │ SECURITY.md                   │ file │  2.6 KiB │ 5 hours ago  │
+# => │ 4 │ benches/README.md             │ file │    249 B │ 2 months ago │
+# => │ 5 │ crates/README.md              │ file │    795 B │ 5 months ago │
+# => │ 6 │ crates/nu-cli/README.md       │ file │    388 B │ 5 hours ago  │
+# => │ 7 │ crates/nu-cmd-base/README.md  │ file │    262 B │ 5 hours ago  │
+# => │ 8 │ crates/nu-cmd-extra/README.md │ file │    669 B │ 2 months ago │
+# => │ 9 │ crates/nu-cmd-lang/README.md  │ file │  1.5 KiB │ a month ago  │
+# => ╰───┴───────────────────────────────┴──────┴──────────┴──────────────╯
 ```
 
 Here, we're looking for any file that ends with ".md". The double-asterisks further specify _"in any directory starting from here."_
@@ -113,29 +125,73 @@ The quoting techniques above are useful when constructing glob-literals, but you
    ls $glob_pattern
    ```
 
+## Creating a Directory
+
+As with most other shells, the [`mkdir` command](/commands/docs/mkdir.md) is used to create new directories. One subtle difference is that Nushell's internal `mkdir` command operates like the Unix/Linux `mkdir -p` by default, in that it:
+
+- Will create multiple directory levels automatically. For example:
+
+  ```nu
+  mkdir modules/my/new_module
+  ```
+
+  This will create all three directories even if none of them currently exists. On Linux/Unix, this requires `mkdir -p`.
+
+- Will not error if the directory already exists. For example:
+
+  ```nu
+  mkdir modules/my/new_module
+  mkdir modules/my/new_module
+  # => No error
+  ```
+
+  ::: tip
+  A common mistake when coming to Nushell is to attempt to use `mkdir -p <directory>` as in the native Linux/Unix version. However, this will generate an `Unknown Flag` error on Nushell.
+
+  Just repeat the command without the `-p` to achieve the same effect.
+  :::
+
 ## Changing the Current Directory
 
-@[code](@snippets/book/moving_around/cd_example.nu)
+```nu
+cd cookbook
+```
 
 To change from the current directory to a new one, use the [`cd`](/commands/docs/cd.md) command.
 
 Changing the current working directory can also be done if [`cd`](/commands/docs/cd.md) is omitted and a path by itself is given:
 
-@[code](@snippets/book/moving_around/cd_without_command_example.nu)
+```nu
+cookbook/
+```
 
 Just as in other shells, you can use either the name of the directory, or if you want to go up a directory you can use the `..` shortcut.
 
 You can also add additional dots to go up additional directory levels:
 
-@[code](@snippets/book/moving_around/multiple_cd_levels.nu)
+```nu
+# Change to the parent directory
+cd ..
+# or
+..
+Go up two levels (parent's parent)
+cd ...
+# or
+...
+# Go up three levels (parent of parent's parent)
+cd ....
+# Etc.
+```
 
 ::: tip
 Multi-dot shortcuts are available to both internal Nushell [filesystem commands](//commands/categories/filesystem.html) as well as to external commands. For example, running `^stat ....` on a Linux/Unix system will show that the path is expanded to `../../../..`
 :::
 
 You can combine relative directory levels with directory names as well:
 
-@[code](@snippets/book/moving_around/relative_cd_levels.nu)
+```nu
+cd ../sibling
+```
 
 ::: tip IMPORTANT TIP
 Changing the directory with [`cd`](/commands/docs/cd.md) changes the `PWD` environment variable. This means that a change of a directory is kept to the current scope (e.g. block or closure). Once you exit the block, you'll return to the previous directory. You can learn more about this in the [Environment](./environment.md) chapter.
@@ -148,7 +204,6 @@ Nu also provides some basic [filesystem commands](/commands/categories/filesyste
 - [`mv`](/commands/docs/mv.md) to rename or move a file or directory to a new location
 - [`cp`](/commands/docs/cp.md) to copy an item to a new location
 - [`rm`](/commands/docs/rm.md) to remove items from the filesystem
-- [`mkdir`](/commands/docs/mkdir.md) to create a new directory
 
 ::: tip NOTE
 Under Bash and many other shells, most filesystem commands (other than `cd`) are actually separate binaries in the system. For instance, on a Linux system, `cp` is the `/usr/bin/cp` binary. In Nushell, these commands are built-in. This has several advantages:
@@ -157,4 +212,4 @@ Under Bash and many other shells, most filesystem commands (other than `cd`) are
 - They are more tightly integrated with Nushell, allowing them to understand Nushell types and other constructs
 - As mentioned in the [Quick Tour](quick_tour.html), they are documented in the Nushell help system. Running `help <command>` or `<command> --help` will display the Nushell documentation for the command.
 
-While the use of the Nushell built-in versions is typically recommended, it is possible to access the Linux binaries. See [Escaping to system](escaping.html#escaping-to-the-system) for details.
+While the use of the Nushell built-in versions is typically recommended, it is possible to access the Linux binaries. See [Running System Commands](./running_externals.md) for details.