...
Use account names associated with a user. For this example, I will be designating adminstrative users under the staff group. To see the list of groups available to you use the command, cat /etc/group.
| Note |
|---|
These steps are assuming that you are logged in with the initial Ubuntu user which as sudo access. If you are using root instead, then you do not need to prefix any command with sudo. |
The staff group by default does not normally have sudo access. To grant sudo access to the staff group,
...
Just look in /var/log/auth.log to see some attackes,
| Code Block |
|---|
cat /var/log/auth.log | grep "Invalid user"
Jun 19 18:18:33 myra sshd[29346]: Invalid user oracle from 210.83.86.139
Jun 19 18:18:36 myra sshd[29349]: Invalid user test from 210.83.86.139
Jun 19 18:19:02 myra sshd[29381]: Invalid user kylix from 210.83.86.139
Jun 19 18:19:09 myra sshd[29387]: Invalid user www from 210.83.86.139
|
...