how to delete duplicate lines in a text file in unix bash?
bash
Solution
One way using `awk`:
awk '!a[$0]++' file.txt
Problem
I just have a file.txt with multiple lines, I would like to remove duplicate lines without sorting the file. what command can i use in unix bash ? sample of file.txt ``` orangejuice;orange;juice_apple pineapplejuice;pineapple;juice_pineapple orangejuice;orange;juice_apple ``` sample of output: ``` orangejuice;orange;juice_apple pineapplejuice;pineapple;juice_pineapple ```