louiseadennis$ history|awk '{a[$2]++} END{for(i in a){printf "%5d\t%s \n",a[i],i}}'|sort -rn|head 175 cd 89 ls 47 less 38 xemacs 37 perl 19 cvs 16 exit 15 ss 12 pdflatex 12 SyntaxBNF-yl-parser-verbose