clark@web ~ %
 ls
contact.txt   
experience
   github.txt
clark@web ~ %
 ls -l experience
total 4713
-rw-r--r--  1 clark  staff  4096  2026  thinking machines
-rw-r--r--  1 clark  staff  4096  2021  jump
-rw-r--r--  1 clark  staff  4096  2016  yale
clark@web ~ %
 cat contact.txt
me [at] clarkxie.com
clark@web ~ %