I'm feeling really, really stupid -- I cannot remember (and I can't seem to find) how to format a drive partition (or, for that matter, a second drive that I want to add later)! Yikes!

I have left-over free space on a hard drive, unformatted. Now I want to use that space and I can't recall what utility to use to format the blasted thing so I can run mkfs -t ext4 (and, maybe, mklost+found while I'm at it. I've already used cfdisk to add that space as sda10, written the partition table, done all that, have the entry in /etc/fstab (commented-out, of course).

Would some kind soul please give me a kick in the right direction?

So, "mkfs -t ext4 /dev/sda10" doesn't work?

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Well -- duh! -- it did. And golly-gee, lost+found was sitting there, too.

Cripes, I hate when I miss stuff -- been a lot of years since I last fiddled with a drive (the setup program does a nice job of fiddling, so...). Used to have to format the things, partition 'em, build file systems, yadda, yadda. So drag me kicking and screaming into the 21st century, eh?

Thank you.

If you want to use a graphical tool - 'gparted', from SlackBuilds.