如果你的目录层次很深的话，这个shell会很方便的直接切换到目的目录，例如
当前目录/usr/home，而目录desdir在/usr/home/app/local/opp/william/desdir
直接打入

　　$ cd desdir，便可直接从当前目录/use/home切换到/usr/home/app/local/opp/william/desdir
配置一下.profile，加入两行
　　. ./bin/chdir
　　alias cd='chdir'
　　file：chdir

　　# auto find your directory
　　# Writer: william 2006 beijing
　　# add the following two line in $HOME/.profile
　　# . ./bin/chdir
　　# alias cd='chdir'

chdir() { if [ -z "$1" ] ; then         cd         PS1="[$PWD]"         export PS1;         return elif [ "$1" = - ] ; then         cd -         PS1="[$PWD]"         export PS1;         return else         if [ -d "./$1" ] ; then         cd ./$1         PS1="[$PWD]"         export PS1;         return         fi fi for LINE in `find $HOME -type d -print | grep -c \/$1$` do if [ $LINE -eq 0 ] ; then         echo "your directory $1 is not exsit($LINE)!"         return fi done for Dir in `find $HOME -type d -print | grep \/$1$` do     if [ $LINE -gt 1 ] ; then         if [ ! -d "$Dir" ] ; then         echo "$Dir is not a directory"         return         fi         printf "$Dir\t\t...do you want to go? default(y)"         read YESNO #       echo "(y/n)="$YESNO         if [ -z "$YESNO" ] ; then                 YESNO=y         fi         case "$YESNO" in                 [yY]|[yY][eE][sS])                         YESNO=y ;;                 [nN]|[nN][oO])                         YESNO=n ;;                 *)                         YESNO="" ;;         esac         if [ "$YESNO" = y ] ; then                 cd $Dir                 PS1="[$PWD]"                 export PS1;                 return         else                 continue         fi   else                 cd $Dir                 PS1="[$PWD]"                 export PS1;                 return   fi done }