# Performing Scans on Directories and Files

Here are the commands and explanations for initiating scans:

## **Basic Scan**

To perform a basic scan on a specified directory:

<pre class="language-bash"><code class="lang-bash">fourclover snapshot <a data-footnote-ref href="#user-content-fn-1">mytargetdir</a>
</code></pre>

This command initiates a scan on the specified directory and generates a scan report.

## **Specifying Output File**

To save the scan report to a specific file:

<pre class="language-bash"><code class="lang-bash">fourclover snapshot mytargetdir -out <a data-footnote-ref href="#user-content-fn-2">scan_report.json</a>
</code></pre>

Use the `-out` option followed by the desired file name.

## **Hash Algorithm Selection**

To select specific hash algorithms for file verification:

<pre class="language-bash"><code class="lang-bash">fourclover snapshot mytargetdir -hashes <a data-footnote-ref href="#user-content-fn-3">sha256,md5</a>
</code></pre>

Use the `-hashes` option followed by a comma-separated list of hash algorithm names.

## **Excluding Files/Directories**

To exclude specific files or directories from the scan:

<pre class="language-bash" data-full-width="false"><code class="lang-bash">fourclover snapshot mytargetdir -exclude <a data-footnote-ref href="#user-content-fn-4">.git,node_modules</a>
</code></pre>

Use the `-exclude` option followed by a comma-separated list of file/directory names.

## **Focusing on File Extensions**

To scan only files with specific extensions:

<pre class="language-bash"><code class="lang-bash">fourclover snapshot mytargetdir -focus <a data-footnote-ref href="#user-content-fn-5">.py,.js,.txt</a>
</code></pre>

Use the `-focus` option followed by a comma-separated list of file extensions.

## **Adding a Report Name**

To add a name to the scan report (useful for comparison purposes):

<pre class="language-bash"><code class="lang-bash">fourclover snapshot mytargetdir -name <a data-footnote-ref href="#user-content-fn-6">"My Project"</a>
</code></pre>

Use the `-name` option followed by the desired name.

[^1]: This is your target directory. Sub directory part is not supported.

[^2]: This can be your desired file name.

[^3]: A comma-separated list of hash algorithm names.

[^4]: A comma-separated list of file/directory names.

[^5]: A comma-separated list of file extensions.

[^6]: The desired name of the snapshot. You can use it to track the snapshot.