Yes the most of the linux systems follow a common standard in file naming at the basic level. But things can vary based upon distribution. Can you please specify on your requirement? Please let us know which part of the directory structure interests you.
First I want to see all the main directories, then look into the Plesk directory and things like that...
Start off in / and use ls -d * as linuxcares said.
# cd /
# ls -d *
then go more specific, e.g.
# cd /usr
# ls -d
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as for psa and swsoft, it is the target :-). check out on psa directory for user files and you will also wish to check the swsoft directory. They might have additional softwares for you in the vault. ;-)
The linux command is simple it displays the whole file list with the attributes like ownership permissions and other details like creation date .. and the like. This is what the first part does, and for the second part, i.e, the part after " | " filters off all the files and restrict linux in displaying only directories.