sort question

[machoq1]

I have a file with multiple node names in it. I need to know how many times does a node name appear in a file
I am looking for something to give result like
NodeA
NodeB

[Rick Garland · Accepted solution]

In addition to piping your results to the sort utility, also pipe to the uniq utility

... | sort | uniq -c

This list each item individually with a count of how many times it is listed.

[machoq1]

Thanks !

[Mel Burslan]

If this file contains nothing but the host names

you can use this:

myinfile=/path/somefilename
outfile=/path/myoutfilename

#in case multiple host names on one line we'll separate them
for h in `cat $myinfile`
do
echo $h > /tmp/temphostfile
done

for host in `cat /tmp/temphostfile|sort|uniq`
do
ct=`grep $host /tmp/hostfile |wc -l`
echo $host" "$count >> $outfile
done

if you can provide a section of your input file, you can get more sensible answers

[Alan Meyer_4]

Given a data file containing

NodeA
NodeC
NodeB
NodeB
NodeC
NodeA
NodeA
NodeA
NodeA
NodeC
NodeC

running the script

sort node.dat|uniq |while read node;do
echo "$node = \c"
echo "`grep $node node.dat |wc -l`"
done


produces

NodeA = 5
NodeB = 2
NodeC = 4