The system's logs contain valuable information about how your system is running. Take a look at the system log, the auth log, and more.
- [Instructor] On a Linux system, there are a few log files…that keep track of a system's activities.…These can be useful for troubleshooting…and for looking for possible security issues.…The first log I want to show you is the system log,…where the kernel and almost everything else…writes information about events, errors and notifications.…That log's stored at /var/log/syslog.…Let's take a look at it with cat.…There's a lot of information here,…so let's take a look and see what we can find.…
Most recently in the log, I can see that…the firewall blocked a lot of activity.…That was from the nmap scan in the previous video.…I can see some information about when I restarted…the OpenSSH server, and scrolling up even further…I can see some of the messages that were…displayed very quickly on the screen during the bootup.…You can also write events into the log yourself…with the logger command.…This can be helpful for making notes as you…troubleshoot something, and it can be used…in your own scripts if you need to…record some status information.…
- Installing Ubuntu Server
- Configuring remote access with SSH
- Configuring the firewall
- Configuring networking with Netplan
- Managing users
- Configuring for scale
- Securing an HTTP server with TLS
- Hosting an application
- Setting up a forwarding DNS server
- Sending email with Postfix
Skill Level Beginner
Lab setup1m 26s
1. Ubuntu Server
2. Securing and Monitoring Your Server
3. Configuring and Managing the Server
4. Exploring Common Services
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