Remove adjacent duplicate lines while keeping the order

uniq will do this for you:

$ uniq inputfile
Golgb1
Akna
Spata20
Golgb1
Akna

Awk solution:

awk '$1 != name{ print }{ name = $1 }' file.txt

The output:

Golgb1
Akna
Spata20
Golgb1
Akna

Try this - save the previous line and compare against current line

$ perl -ne 'print if $p ne $_; $p=$_' ip.txt
Golgb1
Akna
Spata20
Golgb1
Akna

You've tagged uniq as well - did you try it?

$ uniq ip.txt
Golgb1
Akna
Spata20
Golgb1
Akna

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