Negative matching using grep (match lines that do not contain foo)

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I have been trying to work out the
syntax for this
command:

grep !
            error_log | find /home/foo/public_html/ -mmin
            -60

or

grep '[^error_log]' | find
            /home/baumerf/public_html/ -mmin
            -60

I need to see all
files that have been modified except for those named
error_log.

href="http://www.robelle.com/smugbook/regexpr.html" rel="noreferrer">I've read about
it here, but only found one not-regex
pattern.

Answer

grep -v is your
friend:

grep --help | grep invert
            

-v, --invert-match select non-matching
lines

Also
check out the related -L (the complement of
-l).

-L, --files-without-match only print FILE names containing no
match