How do I troubleshoot Linux?

How to troubleshoot network connectivity with Linux server

Table of Contents

Check your network configuration.
Check the network configuration file.
Check the servers DNS records.
Test the connection both ways.
Find out where the connection fails.
Firewall settings.
Host status information.

How do I run a diagnostic on Linux?

Solution:

To run the diagnostic Wizard, ensure that the diagnostic daemons are running on all the machines that you want to include in the diagnosis.
The login host dialog opens.
The ARCserve Backup diagnostic wizard welcome screen appears.
Click Next.
Select the machines that you want to diagnose and click next.

Which command is used for verifying and troubleshooting problems in Linux?

The ip command It’s a useful tool to configure the network, as well as to troubleshoot network connectivity issues. The ip command replaces the functionality of many commands provided with the old net-tools package such as ifconfig , route , and arp , but it adds many other features.

What are the six tools used for troubleshooting?

Some of the basic network troubleshooting tools are as follows:

Ping.
Tracert/ Trace Route.
Ipconfig/ ifconfig.
Netstat.
Nslookup.
Pathping/MTR.
Route.
PuTTY.

How do I troubleshoot Linux server performance issues?

Linux Performance Tools To Troubleshoot Problems

top command. The top program provides a dynamic real-time view of a running system.
sar command. The sar command is performance monitoring tool.
vmstat command.
iostat command.
free command.

How do I run a server diagnostic?

Press F10 at startup. In the left pane of Lifecycle Controller, click Hardware Diagnostics. In the right pane, click Run Hardware Diagnostics. The diagnostics utility is launched.

What are the types of troubleshooting?

Here we will explore the different kinds of troubleshooting steps and the tools we use for fault detection and closure of the same.

Troubleshooting IP Problems.
Troubleshooting Local Connectivity Issues.
Correcting the Repetitive IP address Entry Issue.
Troubleshooting Physical Connectivity Issues.

What are some troubleshooting techniques?

BASIC TROUBLESHOOTING

Don’t panic. Relax.
Prepare for the worst — back it up.
Make sure there really is a problem.
Know your computer.
Look for clues and write them down.
Think about what changed recently on your computer.
Determine repeatability.
Reboots can do wonders sometimes.

How do you troubleshoot performance problems?

Troubleshoot server performance problems

Check the server type and ensure that it has the necessary CPU and RAM resources to meet your application requirements and user load.
Check if your application is using a cache.
Check if there are any cron jobs running on the server and consuming resources.

Why my Linux is slow?

Your Linux computer could be running slow for any one of the following reasons: Unnecessary services started at boot time by systemd (or whatever init system you’re using) High resource usage from multiple heavy-use applications being open. Some kind of hardware malfunction or misconfiguration.

What is netcat tool?

netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP. The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts.

What does ifconfig do?

Use the ifconfig command to determine basic information about the interfaces of a particular system. For example, a simple ifconfig query can tell you the following: Device names of all interfaces on a system. All IPv4 and, if applicable, all IPv6 addresses that are assigned to the interfaces.

How do I check disk for errors in Ubuntu?

Checking the hard disk

Open Disks from the Activities overview.
Select the disk you want to check from the list of storage devices on the left.
Click the menu button and select SMART Data & Self-Tests….
See more information under SMART Attributes, or click the Start Self-test button to run a self-test.

How do I run a diagnostic in Idrac?

After booting into LifeCycle menu, you need to select Hardware Diagnostics and initiate Run Hardware Diagnostics. After clicking the “Yes” button, the hardware components check will initiate. After the scan is completed, an extended memory test will be prompted.