Question : Using Unix sort command to sort both alphabetically and numerically

Suppose I have a text file like this:

Agassi,Andre,USA,US Open,1994,M
Agassi,Andre,USA,Wimbledon,1992,M
Williams,Venus,USA,Wimbledon,2008,F
Williams,Serena,USA,Australian Open,2009,F
Graf,Steffi,Germany,French Open,1993,F
Sampras,Pete,USA,US Open,2002,M
Sampras,Pete,USA,US Open,1993,M

I want to sort it by last name, first name, year, i.e.:

Agassi,Andre,USA,Wimbledon,1992,M
Agassi,Andre,USA,US Open,1994,M
Graf,Steffi,Germany,French Open,1993,F
Sampras,Pete,USA,US Open,1993,M
Sampras,Pete,USA,US Open,2002,M
Williams,Serena,USA,Australian Open,2009,F
Williams,Venus,USA,Wimbledon,2008,F

Can I use the sort command to sort this text file by those 3 fields and pipe the output to more?

Thanks
DTXCF

Answer : Using Unix sort command to sort both alphabetically and numerically

sort -t, -k1,2 -k5,5n file.txt
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