1 enable algorithm-type md5 | scrypt | sha 256 secret corresponding to Class 7 Class 8 Class 9
2 security passwords min-length: minimum password length
3 Set user and password may be provided to Class 7 Class 8 Class 9, exec-timeout maximum overtime limit,
4: dir nvram view the file size and w (wirte) and save the file permissions
5: delete system files command: erase startup-config