Temp Files

[gqpolo]

I am new to Linux and as a former Windows user I am used to deleting temp files(i.e. *.tmp)
My question is which file extension does Linux use to designate a temp file that is safe to delete, where they are kept, etc. I'm running Red Hat 9.0
Thanks in advance for helping,
Bill

[rid3r]

take a look to your /tmp directory, never heard of someone having to delete their temporary files under Linux, though.
It might be because of:
$ cat file.txt | sort > file_sorted.txt
instead of
$ cat file.txt > /tmp/file.tmp
$ sort /tmp/file.tmp > file_sorted.txt

What the other people think?