Sort unique shell trickery

I wanted to know all the different kinds of symbols in a particular version of the Linux kernel’s System.map. I used the following:

$ cut -d ‘ ‘ -f 2 /boot/System.map-2.6.18-5-686 | sort | uniq
A
b
B
d
D
r
R
t
T
W

I was previously unaware of the `uniq` command, which is why I made this post.

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