How can I check if sp package (R software) is installed on my Linux and how can I install it? : <p>I have installed R on my Linux machine. Whenever I type </p>

<pre><code>&gt; library(ps)
</code></pre>

<p>I get </p>

<pre><code>Error in library(ps) : there is no package called ‘ps’
</code></pre>

<p>How can I check if sp package (R software) is installed on my Linux and how can I install it? </p>
