let g:netrw_dirhistmax  =10
let g:netrw_dirhist_cnt =4
let g:netrw_dirhist_1='/usr/include'
let g:netrw_dirhist_2='/usr'
let g:netrw_dirhist_3='/usr/local'
let g:netrw_dirhist_4='/usr/local/include'