Code:
find / -type d -iname 'name of your folder optionally including wild cards'
If you run that as a normal user there will be places it cannot look which result in error messages so discard them with
Code:
find / -type d -iname 'name of your folder optionally including wild cards' 2>/dev/null
If the folder is under your home directory then quicker to use
Code:
find ~ -type d -iname 'name of your folder optionally including wild cards'