If tree is not installed on your Centos system (I typically recommend server setups to use minimal install disk anyhow) you should type the following at your command line:
# yum install tree -y
If this doesn’t install it’s because you don’t have the proper repository. I would use the Dag Wieers repository:
http://dag.wieers.com/rpm/FAQ.php#B
After that you can do your install:
# yum install tree -y
Now you’re ready to roll. Always read the man page: http://linux.die.net/man/1/tree
So quite simply the following will return a tree:
# tree
Alternatively you can output this to a text file. There’s a ton of options too.. Again, read your man page if you’re looking for something other than default output.
# tree > recursive_directory_list.txt
(^^ in a text file for later review ^^)