通过shell，awk，bash排序？

Question

I am trying to learn bash/shell *nix commands /scripting. So rather than writing a python program, I thought of trying it out using bash/awk etc but am having a hard time. I have a huge text (its actually csv )file

 id_1, id_2, some attributes.

I want to sort this file based on id2? how do i do this? Thanks

Answer 1

Use the --key option for sort .

For example, the following sorts input.csv on the second field (using comma as a field separator) and writes the output to output.csv .

 sort --key=2,2 -t',' input.csv > output.csv

ps Don't forget to use the -n option if you're doing a numerical sort.

For more info, see the man page for sort .

Answer 2

You can use -k option of sort(1)

-k, --key=POS1[,POS2]

  start a key at POS1, end it at POS2 (origin 1) 

Answer 3

sort -t, -k2 filename.csv

我没有要验证的外壳，但是基本上您需要指定分隔符和排序键

Answer 4

checkout the command cut:

cat file.cvs | cut -d";" -f 2 | sort

I assumed your csv is semi-colon separated, but you can change it.

Save into a different name:

cat file.cvs | cut -d";" -f 2 | sort > newfile.txt