sort based on the nth character

kumar23kan · 11-08-2015, 07:17 AM

I have file containg data like this

3u49
3u4c
3u4d
1iy8
3wye
1ipf
2ae2
2zat
1ipe
1geg
3gvc
2rhc

Based on the first 3 characters it has to be sorted and only unique line has to be printed based on the first 3 characters.

1geg
1ipe
1iy8
2ae2
2rhc
2zat
3gvc
3u49
3wye

I tried man for sort and uniq i couldn't figure out

thanks

pan64 · 11-08-2015, 07:27 AM

try sort -k and check KEYDEF (and look at the man page again)