Making the sudo command work on macOS Ventura

sudo works just fine in Ventura. I use it all the time.

Did you give macOS Terminal "Full Disk Access"?

Did you give iTerm2 "Full Disk Access"?

System Settings -> Privacy & Security -> Full Disk Access

Are you logging into an 'admin' account or a 'standard' account? This would be System Settings -> Users & Groups, and it should say 'admin' under your account name.

I've also never had any issues like that. What happens when you did attempt to use "sudo"? And what commands were you attempting to use? There are some areas where on the macOS boot drive where even an admin user with "sudo" will be unable to make modifications to the file system. The complete macOS system area now resides on a read-only signed & sealed system volume that cannot be modified by anyone. Basically users are restricted to writing to the "/Users" folder area and some system configuration files which have been linked to a writeable volume.

In addition to the excellent points & questions by @BobHarris, Are you running any anti-virus apps, cleaning/optimizer apps, or third party security software? These types are known to cause all sorts of problems and interfere with the normal operation of macOS.

I see you posted in the macOS Ventura forum, is that indeed the OS you are currently using which has this problem? I know that Sonoma has some very odd configuration defaults where some macOS system utilities don't even have "Full Disk Access" by default.

FYI, we have been seeing a lot of posts on these Apple forums recently where Homebrew has been causing people a lot of headaches by improperly configuring the system causing some basic macOS functionality to be broken at least in regards to using the command line. So be careful.