Merge two lists while removing duplicates

I think

sort file1 file2 | uniq
aaaaaa
bbbbbb
cccccc
mmmmmm
nnnnnn
yyyyyy
zzzzzz

will do what you want.

Additional Documentation: uniq sort

In just one command without any pipe :

sort -u FILE1 FILE2

Suppress duplicate lines

-> http://www.busybox.net/downloads/BusyBox.html

Another solution:

awk '!a[$0]++' file_1 file_2

Related