-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[30959 0] ; cat file
I'm a student.
You are a teacher.
He is a farmer.
He is a farmer.
He is a farmer.
We are workers.
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[30959 0] ; awk '{ if (!seen[$0]++) { print $0; } }' file
I'm a student.
You are a teacher.
He is a farmer.
We are workers.
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[30959 0] ; bye
cax@ibm:~/Desktop> cat a
I'm a student.
You are a teacher.
He is a farmer.
He is a farmer.
He is a farmer.
We are workers.
cax@ibm:~/Desktop> cat a | sort
He is a farmer.
He is a farmer.
He is a farmer.
I'm a student.
We are workers.
You are a teacher.
cax@ibm:~/Desktop> cat a | sort | uniq
He is a farmer.
I'm a student.
We are workers.
You are a teacher.
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