How to sort lines based on a sub string in the line
Use the following command
sort -n -t = -k 2 your_filegives me
alex@rhyme ~ $ ash$ cat <<EOF | sort -n -t = -k 2> aaa=12> bbb=124> cccc=1> dddd=15> EOF cccc=1aaa=12dddd=15bbb=124$ which sort/usr/bin/sort$ LANG=C sort --versionsort (GNU coreutils) 8.21Copyright (C) 2013 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law.Written by Mike Haertel and Paul Eggert.Check the sort manpage for other sort options