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Old 08-07-2017, 05:42 AM   #16
GazL
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Even when you use sort, there are tricks you can use to maintain the input order.

Code:
test@ws1:/tmp$ cat input.txt 
4 ZZZ
1 ABC
1 DEF
1 MNO
2 PQR
2 UVW
3 XYZ
4 CCC
test@ws1:/tmp$ cat -n input.txt | sort -u -k 2,2 | sort -k 1n | cut -f2
4 ZZZ
1 ABC
2 PQR
3 XYZ
test@ws1:/tmp$
 
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