The term you must be referring to/confusing this with, is the Linux/Unix term "root/(ing)", which in all reality is the same idea, different word. HOWEVER, moving on, there is a guide to check out listed here: LINK!
*NOTE!: Be weary though that AS MENTIONED there is ALWAYS a chance to brick your wii, whether it be in "softmodding" it or removing the "softmod" BUT just take heed that there is definitely risk involved.
REMEMBER: There is definitely a "search" button, use it wisely