TÚ commands have irregular commands in the positive form only. For the most part, they're the GO verbs you learned about in the present tense:
Verb | POSITIVE COMMAND | NEGATIVE COMMAND |
tener | ten | no tengas |
salir | sal | no salgas |
poner | pon | no pongas |
decir | di | no digas |
venir | ven | no vengas |
hacer | haz | no hagas |
ser | sé | no seas |
ir | ve | no vayas |