How to sort lines in a text file from the terminal?

Nam     GPA    Something
xyz     3.4     99  
pqr     4.5     23  
abc     5.6     44  
dcd     4.4     22  
edr     2.2     78

If you have a file like above. You can use the command below to sort by GPA. (change the key to sort by any field : '-k value')

sort -k 2 filename

If you want the reverse order use -r option

sort -r -k 2 filename

PuTTy is just the program used to connect to a computer.

There's a lovely command called sort you may wish to try.

Another man for manual, will give you all sorts of good information.

Try man sort or even the manual for the manual man man.

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