The Bash shell is really useful and it is easy to do interesting things . . .
If you have a file with columns separated by spaces and/or tabs you can sort it using
$ sort -k columnfile.txt
To reverse the sort just type
$ sort -r -k columnfile.txt
If you want to extract columns 3, 5 and 6 you kan use the awk command
$ awk '{print $5, $3, $6 }' columnfile.txt
. . . the output will also rearrange the order if you like
You can also use perl to generate bash files that you can run later . . .
To remove the first line from a file you use
sed -i 1d columnfile.txt
To replace kr with SEK in the file you would use
sed -i 's/kr/SEK/' columnfile.txt
And to add chr to the beginning of each line use
sed 's/^/chr/' columnfile.txt