UNIX for Dummies Questions & Answers

Hello,
I have a file Test.txt with 9 columns that looks like this:

1g12 A 14 19 2OAY A 326 331 AAAASA
1l7v A 68 73 1l7v A 68 73 AALAIS
1l7v A 68 73 1XVW B 72 77 AALAIS
1l7v A 68 73 1XXU A 65 70 AALAIS
1l7v A 68 73 1XXU B 65 70 AALAIS
1l7v A 68 73 1XXU C 65 70 AALAIS
1l7v A 68 73 1XXU D 65 70 AALAIS
1j1n A 439 444 1j1n A 439 444 ADVRTY
1j1n A 439 444 1FUI B 360 365 ADVRTY

I am trying to remove repetitive entries from this file. The repetitive entry is where Col1=Col 5 AND Col 2=Col 6 AND Col 3=7 AND Col 4=Col 8. Examples of this are in bold above.

Is there a way to remove these repetitive entries and print the rest? I have read through some threads and tried to copy some awk scripts.. I have tried it at least for the first condition of Col1!=Col 5 but I get syntax errors. The code I wrote:

awk -F" " '{if($1!=$5){print $1" "$2" "$3" "$4" "$5" "$6" "$7" "$8" "$9"} }' Test.txt

Can someone advise me how to write this properly, extend it to all the conditions I mentioned, and print the whole line if all conditions are met?

Thanks in advance!
DG

Code:

$ cat Test
awk '
  ($1 == $5) && ($2 == $6) && ($3 == $7) && ($4 == $8) { next }
  1
' file1

$ ./Test
1g12 A 14 19 2OAY A 326 331 AAAASA
1l7v A 68 73 1XVW B 72 77 AALAIS
1l7v A 68 73 1XXU A 65 70 AALAIS
1l7v A 68 73 1XXU B 65 70 AALAIS
1l7v A 68 73 1XXU C 65 70 AALAIS
1l7v A 68 73 1XXU D 65 70 AALAIS
1j1n A 439 444 1FUI B 360 365 ADVRTY

another way:

Code:

awk -F" " '{if($1!=$5||$2!=$6||$3!=$7||$4!=$8){print $0}}' test.txt
1g12 A 14 19 2OAY A 326 331 AAAASA
1l7v A 68 73 1XVW B 72 77 AALAIS
1l7v A 68 73 1XXU A 65 70 AALAIS
1l7v A 68 73 1XXU B 65 70 AALAIS
1l7v A 68 73 1XXU C 65 70 AALAIS
1l7v A 68 73 1XXU D 65 70 AALAIS
1j1n A 439 444 1FUI B 360 365 ADVRTY

Yours would've worked if you remove the " after $9.

Code:

awk '$1" "$2" "$3" "$4!=$5" "$6" "$7" "$8' infile

Code:

sed '/\(\([^ ]* \)\{4\}\)\1/d' infile

Code:

sed -r '/(([^ ]* ){4})\1/d' infile

Code:

egrep -v '(([^ ]* ){4})\1' infile

Code:

egrep -v '((\w* ){4})\1' infile

Thank you all for your replies!
Works fine now!