Help me with awk command in Unix please

[wazzup]

This is my file named students

Tom     Jones   100     90      80
Nancy   Jones    70     80      90
Terry   Sims     55     65      75
John    Terry    75     76      77
Ruth    Maier    100    100     100
Mike    Wolfe    90     95      98
Dennis  Cole     70     80      89
Ron     Maier    90     85      89
Susan   Miller   65     80      90
Mad     Bill     75     65      77

I want to print out the contents of students file such that first names and last names are swapped.

I plan to write a for loop print out one first name (first column) at the time, the take it to compare if it equal with any last name at second column by another nest for loop. But I can't. UNIX is new to me and awk is weird, it prints all at the time not like in C.

Please help me this!

[sicarie]

This is my file named students

Tom     Jones   100     90      80
Nancy   Jones    70     80      90
Terry   Sims     55     65      75
John    Terry    75     76      77
Ruth    Maier    100    100     100
Mike    Wolfe    90     95      98
Dennis  Cole     70     80      89
Ron     Maier    90     85      89
Susan   Miller   65     80      90
Mad     Bill     75     65      77

I want to print out the contents of students file such that first names and last names are swapped.

I plan to write a for loop print out one first name (first column) at the time, the take it to compare if it equal with any last name at second column by another nest for loop. But I can't. UNIX is new to me and awk is weird, it prints all at the time not like in C.

Please help me this!

What do you have so far?

[arthurzzk]

cat your_Text_File | awk '{print $2, $1}'

For example:
cat switchTwoColoumn.txt | awk '{print $2, $1}'

This command:
Switch coloumn 1 and 2 in switchTwoColoumn.txt file.
print then on screen.

output of your text file:

Jones Tom
Jones Nancy
Sims Terry
Terry John
Maier Ruth
Wolfe Mike
Cole Dennis
Maier Ron
Miller Susan
Bill Mad

[skp246]

This is my file named students

Tom     Jones   100     90      80
Nancy   Jones    70     80      90
Terry   Sims     55     65      75
John    Terry    75     76      77
Ruth    Maier    100    100     100
Mike    Wolfe    90     95      98
Dennis  Cole     70     80      89
Ron     Maier    90     85      89
Susan   Miller   65     80      90
Mad     Bill     75     65      77

I want to print out the contents of students file such that first names and last names are swapped.

I plan to write a for loop print out one first name (first column) at the time, the take it to compare if it equal with any last name at second column by another nest for loop. But I can't. UNIX is new to me and awk is weird, it prints all at the time not like in C.

Please help me this!

[code] awk '{print $2 "\t" $1 "\t" $3 "\t" $4 "\t" $5 }' students

[ghostdog74]

cat your_Text_File | awk '{print $2, $1}'
For example:
cat switchTwoColoumn.txt | awk '{print $2, $1}'

useless use of cat.

 awk '{print $2,$1}' file