Pastable version of Memory usage script

<div style="overflow:auto;border:solid 1px #ccc;background:#000;color:#F8F8F8">
 <div class="section">
 mem
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 <pre class="sunburst">#!/bin/sh

# 2008 Jon Mulder &lt;mulderje@muohio.edu&gt;

AWK=/usr/bin/awk
EGREP=/bin/egrep
FREE=/usr/bin/free
GREP=/bin/grep
HEAD=/usr/bin/head
PERL=/usr/bin/perl
PS=/bin/ps
SORT=/usr/bin/sort

TOTALMEM=`$FREE -m | $GREP Mem | $PERL -pe 's/Mem:\s+([0-9]+).*/$1/'`
RETVAL=0
case &quot;$1&quot; in
 nginx)
 $PS aux | $GREP nginx | $EGREP -v 'grep|/bin/sh' |
 $AWK -v totalmem=&quot;$TOTALMEM&quot; 'BEGIN { total=0; printf &quot;%-10s %-10s %-10s %s\n&quot;, &quot;USER&quot;, &quot;%MEM&quot;, &quot;PID&quot;, &quot;PROCESS TYPE&quot;
 print &quot;---------------------------------------------&quot; }
 { printf &quot;%-10s %-10.2f %-10s %s\n&quot;, $1, $4, $2, $12; total+=$4; }
 END { printf &quot;%-10s %-10.2f %-0.0f MB used\n&quot;, &quot;TOTAL:&quot;, total, (total/100)*totalmem }'
 RETVAL=$?
 ;;
 thin)
 $PS aux | $GREP thin | $EGREP -v 'grep|/bin/sh' |
 $AWK -v totalmem=&quot;$TOTALMEM&quot; 'BEGIN { total=0; printf &quot;%-10s %-10s %-10s %s\n&quot;, &quot;USER&quot;, &quot;%MEM&quot;, &quot;PID&quot;, &quot;SERVER:PORT&quot;
 print &quot;--------------------------------------------&quot; }
 { printf &quot;%-10s %-10.2f %-10s %s\n&quot;, $1, $4, $2, $13; total+=$4; }
 END { printf &quot;%-10s %-10.2f %-0.0f MB used\n&quot;, &quot;TOTAL:&quot;, total, (total/100)*totalmem }'
 RETVAL=$?
 ;;
 php)
 $PS aux | $GREP php5 | $EGREP -v 'grep|/bin/sh' |
 $AWK -v totalmem=&quot;$TOTALMEM&quot; 'BEGIN { total=0; printf &quot;%-10s %-10s %-10s %s\n&quot;, &quot;USER&quot;, &quot;%MEM&quot;, &quot;PID&quot;, &quot;EXECUTABLE&quot;
 print &quot;-------------------------------------------&quot; }
 { printf &quot;%-10s %-10.2f %-10s %s\n&quot;, $1, $4, $2, $11; total+=$4; }
 END { printf &quot;%-10s %-10.2f %-0.0f MB used\n&quot;, &quot;TOTAL:&quot;, total, (total/100)*totalmem }'
 RETVAL=$?
 ;;
 top)
 [ -n $2 ] &amp;&amp; [ $2 -eq $2 2&gt; /dev/null ] &amp;&amp; NUM=$2 || ( NUM=10 &amp;&amp; echo &quot;$2 is not a number - Using 10 by default&quot; )
 $PS aux | $SORT -nr -k 4 | $HEAD -$NUM |
 $AWK -v totalmem=&quot;$TOTALMEM&quot; 'BEGIN { total=0; printf &quot;%-10s %-10s %-10s %-10s %s\n&quot;, &quot;USER&quot;, &quot;%MEM&quot;, &quot;MEM&quot;, &quot;PID&quot;, &quot;EXECUTABLE&quot;
 print &quot;------------------------------------------------------&quot; }
 { printf &quot;%-10s %-10s %-10.2f %-10s %s\n&quot;, $1, $4, ($4/100)*totalmem, $2, $11; total+=$4; }
 END { printf &quot;%-10s %-10.2f %-0.0f MB used\n&quot;, &quot;TOTAL:&quot;, total, (total/100)*totalmem }'
 RETVAL=$?
 ;;
 *)
 echo &quot;Usage: mem {nginx|thin|php|top [number]}&quot;
 exit 1
 ;;
esac
exit $RETVAL
</pre>
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Refactor :my => 'code'

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Pastable version of Memory usage script