how to remove the multiple records and keep the original order

[dfs1988]

Hi,

I have an file like this


a13
a12
a11
a12
a11
a11
a13


I would like to have an output file like this, remove the multiple records and keep the order

a13
a12
a11

Regards


Mike

 

[PHV]

One way:

awk '!($1 in a){print;a[$1]}' input > output

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[dfs1988]

Thank you, Master!