Log Analysis

Harish — Thu, 15 Sep 2022 06:05:45 +0000

1.Write down top 10 events in Windows and identify their event ID ?
4624 Successful account log on
4625 Failed account log on
4634 An account logged off
4648 A logon attempt was made with explicit credentials
4719 System audit policy was changed.
4964 A special group has been assigned to a new log on
1102 Audit log was cleared. This can relate to a potential attack
4720 A user account was created
4722 A user account was enabled
4723 An attempt was made to change the password of an account

2.Write down top 10 events in Linux and identify their pattern and log linux ?
/var/log/messages
/var/log/auth.log
/var/log/secure
/var/log/boot.log
/var/log/dmesg
/var/log/kern.log
/var/log/faillog
/var/log/yum.log
var/log/httpd/
/var/log/mysql.log

3.Identify the log file in linux which log service
start|stop|enable|disable ?
systemctl start service
systemctl stop service
systemctl enable service
systemctl disable service

4.Identify the log file in linux which log process running or killed ?
Check in /var/log/kern.log (on Debian/Ubuntu, other distributions might send kernel logs to a different file, but usually under /var/log under Linux

5.Identify the log file of apache and find out list of VERB and count of each using linux command?
Location of the Log Files By default on Debian-based distributions such as Ubuntu, access and error logs are located in the /var/log/apache2 directory.
On CentOS the log files are placed in /var/log/httpd directory.Reading and Understanding the Apache Log Files

Understanding Datadog Agent

Harish — Tue, 13 Sep 2022 10:09:14 +0000

What is Datadog agent?
The Datadog Agent is software that runs on your hosts. It collects events and metrics from hosts and sends them to Datadog, where you can analyze your monitoring and performance data. The Datadog Agent is open source and its source code.
The Datadog agent is a lightweight software installed on applications hosts that helps push every log, event, trace, and metric produced by your applications and infrastructure using the Datadog APIs.
Type of Datadog Agent?
DogstatsD,StatsD
Ports used to in Datadog agent?
HTTP, TCP, HTTPS
Top 5 commands with simple explanation troubleshooting Datadog agent?
sudo systemctl start datadog-agent - Start agent
sudo systemctl stop datadog-agent - Stop agent
sudo systemctl restart datadog-agent - Restart agent
sudo systemctl status datadog-agent - Check status
Locate how to enable Logs monitoring in datadog.yaml
edit the datadog.yaml file. Locate the logs: section and set enabled: false to enabled: true.
5 techniques for troubleshooting Datadog?
Verify API token (datadog.yaml)
Verify site/region (datadog.yaml)
Datadog Agent is running or not under services
check if logs enabled under config file

Debug School: Harish

Log Analysis

Understanding Datadog Agent