How do I delete a file using Xterminal?

Hi , recently in the interest of playing Doom thro my N900 - I copied 3 wad files thro xterminal to opt/doom/wads..
Now i guess this is occupying my root memory? do you know how i can delete the files using Xterminal. pls let me know
thx.

if it is in /opt, it shouldn't be!!
/opt is actually linked into /home
/home is a 2GIG partition on the EMMC that stores /opt (for optified packages.. all packages you download should sit in /opt) and all your settings / content (like address books and conversations)
To delete it using an x terminal, you really mean using a shell.. the shell is what you see inside the x terminal..
cd /opt/blah/dir
rm filename
rm is delete.. or more accurately remove!! It came in a time when keypresses were expensive
cp is copy
mv is move /rename
ls is list (as in dir)
df is diskspace free
du is diskspace used (as in by a file or directory)
there are loads of things like that
be careful.. rm is the easiest way to ruin a system!

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