Aimin Yan wrote: > i have a file, I want to sort this file based on the 2nd column, and > start from 1st row.how can > I do use sort command to do in redhat linux. > for example, this is file I want to sort sort -k2 -n orignal_file -o sorted_file -r will reverse the sort order man page for sort is fairly small, and worth a read if your using it. Regards, Sean