Brute force discover
$ sudo zcat /var/log/auth.log.*.gz | awk '/Failed password/&&!/for invalid user/{a[$9]++}/Failed password for invalid user/{a["*" $11]++}END{for (i in a) printf "%6s\t%s\n", a[i], i|"sort -n"}'
33 *abc
35 *upload
36 *sales
39 *center
40 *web
43 *fax
43 *public
48 *asterisk
48 *office
48 *temp
53 *test
59 *admin
65 *info
69 *postgres
74 *oracle
541 root
What do you think?
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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sudo cat /var/log/secureas a first part of the command on Fedora (rest of a command remaining the same)