Bash sort by regexp

Question

I have something about 100 files with the following syntax

ahfsdjfhdfhj_EPI_34_fdsafasdf
asdfasdf_EPI_2_fdsf
hfdjh_EPI_8_dhfffffffffff
ffffffffffasdfsdf_EPI_         


        

Answer 1

This might work for you:

 ls | sed 's/.*EPI_\([0-9]*\)/\1 &/' | sort -n | sed 's/\S* //'