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<p dir="auto">Looking at <code>gnutls-3.6.8/tests/scripts/common.sh</code>, it looks like you can remove <code>-l</code> for Linux and Solaris. The <code>-a</code> is present, and the <code>grep</code> is present:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">check_if_port_listening() {</span>
<span id="LC2" class="line" lang="plaintext"> local PORT="$1"</span>
<span id="LC3" class="line" lang="plaintext"> local PFCMD; have_port_finder</span>
<span id="LC4" class="line" lang="plaintext"> $PFCMD -anl|grep "[\:\.]$PORT"|grep LISTEN >/dev/null 2>&1</span>
<span id="LC5" class="line" lang="plaintext">}</span></code></pre>
<p dir="auto">Do you know why <code>-l</code> is present?</p>
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