What if you jailbreak your iPod touch but you deleted cydia with cydelete how can I get it again
You deleted the Cydia installer package and to get it back, you must restore the iPod and then proceed to jailbreak it again. You can also run Redsnow and under the 'Jailbrake' tab, check the 'Install Cydia' tab alone.
Plug it to redsn0w and re-jailbreak. Check Cydia and you're good.