Dear All

From my previous posts , I learned from you to make use of 'sort' , 'grep' ,

and 'grep -v' to manipulate text files . At now, I have generated a large text file from my autoexpect script. To be more specific, I need to find how many distinct records are there in say column#1? How can I filter out the distinct records with number of occurances less than a pre-determined threshold?Can you please show my the power of CentOS in manipulating text files? Thank you