pushd
namepushd
+
npushd
The first form changes the working directory to name and adds it to the directory stack. The second form rotates the nth entry to the beginning, making it the working directory. (Entry numbers begin at 0.) With no arguments, pushd switches the first two entries and changes to the new current directory. See also dirs and popd.
5%dirs
/home/bob /usr 6%pushd /etc
Add /etc to directory stack /etc /home/bob /usr 7%pushd +2
Switch to third directory /usr /etc /home/bob 8%pushd
Switch top two directories /etc /usr /home/bob 9%popd
Discard current entry; go to next /usr /home/bob