sorting numerically in unix [duplicate]

Question

I have question about sorting files,and my question is different from other questions about sorting I have a folder including hundereds of files looks like this

anacovaux_1052_summary_betai.out
anacovaux_1052_summary_Pdelta.out
anacovaux_1052_summary_pij.out
anacovaux_1053_DIC.out
anacovaux_1053_summary_betai.out
anacovaux_1053_summary_beta_params.out
anacovaux_1048_DIC.out
anacovaux_1048_summary_betai.out
anacovaux_1043_summary_pi_xtx.out
anacovaux_1058_DIC.out

I wanted to know is there any way that I could sort them numerically? I mean get something like this:

anacovaux_1043_summary_pi_xtx.out
anacovaux_1048_DIC.out
anacovaux_1048_summary_betai.out
anacovaux_1052_summary_betai.out
anacovaux_1052_summary_Pdelta.out
anacovaux_1052_summary_pij.out
anacovaux_1053_DIC.out
anacovaux_1053_summary_betai.out
anacovaux_1053_summary_beta_params.out
anacovaux_1058_DIC.out

Answer 1

Using ls from GNU coreutils (default on most Linux systems):

$ ls -v -1

This will list the filenames in one single column (-1), sorted using the natural sort order for numbers within the filename ("version sorting", -v). This assumes that all filenames have the same prefix string up to the actual number (anacovaux_ for example).

For systems without GNU ls:

$ print '%s\n' * | sort -t '_' -k2,2n

This will sort the names on the number after the first _ character in the name. Again, it assumes that the filename prefix is constant (this solution totally ignores the prefix up to the first _).

Answer 2

If you want to list files in a folder in custom sort order:

ls -1 yourfolder | sort -t'_' -k2,2n