Editing CSV file in Centos command line - linux

Hi I have a complex CSV file, I would like to be able to open/edit this file so it fits an ELFF format,
im new to Centos / Linux in general. is there a way to open my CSV file so I can edit it to fit the ELFF format from the command line? or an application I can install todo this?
Thanks for all the help

I was being a bit of an idiot, I just used vi (I know this isn't really the place for this question) but just incase anyone else wanted to know the answer.

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