title: write to a file after piping output from tail -f through to grep
body: <p>I'm looking to write to a file after piping output from tail -f through to grep.
  Say,write to a file "temp" for all lines with "Playing:" within in error_log "FreeSwitch.log".</p>
  
  <pre><code> tail -f "/var/lof/freeswitch/freeswitch.log" | grep "Playing:" &gt; temp
  </code></pre>
  
  <p>but not working ! It is a centos 5.5</p>