Say you have downloaded many txt files from the internet/torrent. And you have something like this >
Once done, copy the folder (which contained all the txt files) to a Linux.
Apply the following commands:
1) #cd /root/Desktop/Wordlist --------> Cd into your folder that contains the text files
2) #cat *.* > /root/Desktop/Wordlist/Biglist.txt -------> This will compile all the txt files into one huge list
3)#cat Biglist.txt | sort | uniq > Biglist2.txt ----------> This will sort it and remove duplicates