docs: Add sudo on commands, chmod before mv on install docs (#7009)

docs/getting-started/installation.md

@@ -61,7 +61,7 @@ brew install trivy
 Arch Linux Package Repository.
 
 ```bash
-pacman -S trivy
+sudo pacman -S trivy
 ```
 
 References: 
@@ -165,15 +165,15 @@ The plugin used by both tools is developped [here](https://github.com/zufardhiya
 
 1. Download the file for your operating system/architecture from [GitHub Release assets](https://github.com/aquasecurity/trivy/releases/tag/{{ git.tag }}).  
 2. Unpack the downloaded archive (`tar -xzf ./trivy.tar.gz`).
-3. Put the binary somewhere in your `$PATH` (e.g `mv ./trivy /usr/local/bin/`).
-4. Make sure the binary has execution bit turned on (`chmod +x ./trivy`).
+3. Make sure the binary has execution bit turned on (`chmod +x ./trivy`).
+4. Put the binary somewhere in your `$PATH` (e.g `sudo mv ./trivy /usr/local/bin/`).
 
 ### Install Script
 
 The process above can be automated by the following script:
 
 ```bash
-curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b /usr/local/bin {{ git.tag }}
+curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sudo sh -s -- -b /usr/local/bin {{ git.tag }}
 ```
 
 ### Install from source