No puedo instalar el paquete de chron en centos 7

Hi Camila, welcome!

Could you post the actual error message you are getting? or ideally, could you post a propper REPRoducible EXample (reprex) illustrating your issue?
So far you are not giving us enough information to help you.

Also, please try to make your questions in English, since its the preferred language here, by using Spanish you are excluding most people from the conversation and lowering your chances of getting help.