history | awk ‘{print $2;}‘ | grep -v ‘^./‘ | sort -d | uniq -c | sort -nr | head -n 10
grep, ‘-v‘ means invert-match,‘^‘ specify the begin of a line.
sort, ‘-d‘ means dictionary order, ‘-n‘ means take the string as a number, ‘-r‘ means reverse.
uniq -c, can prefix lines by the number of occurences.
Find the Top 10 commands in your linux box!
原文：http://www.cnblogs.com/instona/p/3956586.html