In MVS™, you can edit z/OS UNIX files by using the TSO/E OEDIT command to invoke ISPF File Edit or by selecting File Edit on the ISPF menu, if it is installed.

In a shell, you can use the ed and sed editors for editing z/OS UNIX files. You can use the oedit shell command to invoke ISPF File Edit. If you use rlogin or telnet to login to the shell, you can also use the vi editor.