May 21 13:05:01 sshd: pam_unix(sshd:session): session closed for user daygeek May 21 11:24:14 sshd: pam_unix(sshd:session): session opened for user daygeek by (uid=0) May 21 11:22:11 sshd: pam_unix(sshd:session): session closed for user nagios May 21 11:21:07 sshd: pam_unix(sshd:session): session closed for user nagios May 21 11:21:03 sshd: pam_unix(sshd:session): session opened for user nagios by (uid=0) May 21 07:09:14 sshd: pam_unix(sshd:session): session opened for user root by (uid=0) May 21 07:05:31 sshd: pam_unix(sshd:session): session closed for user nagios May 21 04:40:25 sshd: pam_unix(sshd:session): session opened for user root by (uid=0) In this case, we will look at the contents of the ‘/var/log/secure’ file to check the user login attempts, but it looks awkward because it has a lot of lines: # less /var/log/secure 1) Checking successful and failed login attempts using less commandĪs usual, you can manually check any log files in Linux using the less command. User authentication logs are located /var/log/secure for RHEL based systems & /var/log/auth.log for Debian based systems. Commands are given below:įor Debian system: $ sudo apt-get install auditdįor RPM based systems: $ sudo systemctl start auditd Most of the major Linux distributions include the audit package on their distribution official repository, so simply use the Package Manager to install it. ![]() The reports have a column label at the top to help the user understand each column values. The aureport utility offers many option to get several reports such as, success, failed, authentication attempts, summary, etc. What’s aureport?Īureport is a tool that produces summary reports of the audit system logs. It is part of audit tool which will give you more detailed information about user login attempts. If so, what is a better way to achieve this? But, unfortunately these are not proved to be sufficient and you won’t get a clean picture ultimately. User login information can be viewed manually using the ‘more’ or ‘less’ command since the login information is stored in a text file, but you may face difficulty while reading them because it contains a lot of information.Īlternatively, it can be done with the ‘grep’ command which will give you better visibility compared to above commands. ![]() ![]() Bash Script to Check Successful and Failed User Login Attempts on Linux.How to set up/enable Email alerts for SSH root login on Linux.To learn more about this, please visit the following links: We have written several articles in the past to receive email alerts upon user login attempts. Administrators can also review the logs to identify possible security breaches on the servers.īasically to identify whether these attempts were genuine or the user had trouble to access the system or if the attempts are happening through spyware, etc. One of the routine task of administrators is to track Successful and Failed login attempts, to make sure there is no unwanted/illegal attempts on the environment.
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