How to have Linux ls command show second in time stamp

Does your version of ls support the --time-style option? If so:

ls -la --time-style=full-iso blah

-rw-r--r-- 1 root root 0 2011-11-08 18:02:08.954092000 -0700 blah

The more simple way is:

ls --full-time

which is equal to

ls -l --time-style=full-iso

If you want to show entries as hidden files starting with ., add -a:

ls --full-time -a

For OS X, it looks like the best you get is:

ls -l -T

From the ls(1) manpage on 10.10.5:

-T When used with the -l (lowercase letter ``ell'') option, display complete time information for the file, including month, day, hour, minute, second, and year.