merge 3 lines into one line please

[hok1man]

hi guys,

as title so the input like this..
a, b, c
12
345
ert, test
again
again

the expected output is :
a, b, c, 12, 345
ert, test, again, again


every three lines..

thanks heaps guys

 

[cspilman]

How about this:

cnt=1 ; while read line
do
  if [ "${cnt}" -lt 3 ] ; then
        echo "${line} \c"
        ((cnt+=1))
  else
        echo "${line}"
        cnt=1
  fi
done < /path/to/file

Regards,
Chuck

 

[hok1man]

Thanks cspilman,

I found it
awk '{printf "%s,",$0;getline;printf "%s,",$0;getline;printf "%s,",$0}' /path/to/file

 

[fpmurphy]

Or you can use sed .....

sed -e 'N;N;s/\n/, /g' file