Fix SDK installation guide on Linux (#11034)

_Description of what this PR is changing or adding, and why:_ 

Currently, the installation guide on Linux goes against the
[FHS](https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard).
According to FHS (Filesystem Hierarchy Standard):
- ```/usr``` should not be modified by the administrator, except when
installing or removing vendor-supplied packages.
- ```/usr/bin``` should only be managed by the package manager.
- There must be no subdirectories in ```/usr/bin```.

## Presubmit checklist

- [ ] This PR is marked as draft with an explanation if not meant to
land until a future stable release.
- [x] This PR doesn’t contain automatically generated corrections
(Grammarly or similar).
- [x] This PR follows the [Google Developer Documentation Style
Guidelines](https://developers.google.com/style) — for example, it
doesn’t use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first person).
- [x] This PR uses [semantic line
breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks)
of 80 characters or fewer.

Co-authored-by: Parker Lougheed <[email protected]>

src/_data/shells.yml

@@ -1,14 +1,14 @@
 - name: bash
- set-path: echo 'export PATH="/usr/bin/flutter/bin:$PATH"' >> ~/.bash_profile
+ set-path: echo 'export PATH="~/development/flutter/bin:$PATH"' >> ~/.bash_profile
 - name: zsh
- set-path: echo 'export PATH="/usr/bin/flutter/bin:$PATH"' >> ~/.zshenv
+ set-path: echo 'export PATH="~/development/flutter/bin:$PATH"' >> ~/.zshenv
 - name: fish
- set-path: fish_add_path -g -p /usr/bin/flutter/bin
+ set-path: fish_add_path -g -p ~/development/flutter/bin
 - name: csh
- set-path: echo 'setenv PATH "/usr/bin/flutter/bin:$PATH"' >> ~/.cshrc
+ set-path: echo 'setenv PATH "~/development/flutter/bin:$PATH"' >> ~/.cshrc
 - name: tcsh
- set-path: echo 'setenv PATH "/usr/bin/flutter/bin:$PATH"' >> ~/.tcshrc
+ set-path: echo 'setenv PATH "~/development/flutter/bin:$PATH"' >> ~/.tcshrc
 - name: ksh
- set-path: echo 'export PATH="/usr/bin/flutter/bin:$PATH"' >> ~/.profile
+ set-path: echo 'export PATH="~/development/flutter/bin:$PATH"' >> ~/.profile
 - name: sh
- set-path: echo 'export PATH="/usr/bin/flutter/bin:$PATH"' >> ~/.profile
+ set-path: echo 'export PATH="~/development/flutter/bin:$PATH"' >> ~/.profile

src/_includes/docs/install/flutter/download.md

@@ -34,11 +34,11 @@
  -d {{path}}
  {%- endcapture %}
 {% else -%}
- {% assign diroptions='`/usr/bin/`' %}
- {% assign dirinstall='`/usr/bin/`' %}
+ {% assign diroptions='`~/development/`' %}
+ {% assign dirinstall='`~/development/`' %}
  {% assign unzip='tar' %}
- {% assign path='/usr/bin/' %}
- {% assign flutter-path='/usr/bin/flutter' %}
+ {% assign path='~/development/' %}
+ {% assign flutter-path='~/development/flutter' %}
  {% assign terminal='a shell' %}
  {% assign prompt='\$' %}
  {% assign dirdl='~/Downloads/' %}

src/_includes/docs/install/reqs/linux/set-path.md

@@ -33,7 +33,7 @@ add Flutter to the `PATH` environment variable.
  :::note
  If the above doesn't work, you might be using a non-login shell.
  In that case, add the same line to ~/.bashrc: `console $ echo
- 'export PATH="/usr/bin/flutter/bin:$PATH"' >> ~/.bashrc `.
+ 'export PATH="~/development/flutter/bin:$PATH"' >> ~/.bashrc `.
  To ensure consistency across all shell types, source ~/.bashrc from
  ~/.bash_profile by adding the following to ~/.bash_profile: ` if [ -f
  ~/.bashrc ]; then source ~/.bashrc fi `.

src/content/get-started/test-drive/index.md

@@ -24,7 +24,7 @@ toc: false
  {% assign prompt2='$' %}
  {% assign dirdl='~/Downloads/' %}
 {% else -%}
- {% assign path='/usr/bin/' %}
+ {% assign path='~/development/' %}
  {% assign terminal='a shell' %}
  {% assign prompt1='$' %}
  {% assign prompt2='$' %}