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This article will explain in detail what are the easier ways to make Linux troubleshooting. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Linux troubleshooting skills are highly valued in the data center. Data center experts provide references to performance issues, optimization, and convenience tools related to Linux server troubleshooting.

Does the 1.Linux performance tool work well?

Maybe you've never used pchar, pidstat, or perf_events, but you're not alone. These are just a few of a number of Linux performance tools that you can use to observe bandwidth, performance status, and track dynamically. These tools may sound unimpressive, but if properly implemented, they can significantly improve Linux performance.

two。 How to handle malware attacks against Linux servers?

Linux servers also have malware problems; they just behave differently from other platforms. Rootkit is the most common cause of these problems. They modify the original binaries of the server and replace them with a version with a back door, thus breaking the security and privacy of the system.

Rootkit can capture servers and make them extremely vulnerable. Using a file inspector or an advanced intrusion detection system, you can quickly locate and determine the possible damage caused by rootkit. You can also use some Linux commands, such as rpm-Va, to help the system administrator verify the authentication of the authentication installation package.

3. What caused the server connection to fail and how can I solve this problem?

It is difficult to confirm whether it is a Transport layer Security (TLS) certificate issue, which makes it difficult for Linux to troubleshoot when it is unable to connect to the server.

First, determine if there is a problem with the certificate. You need to be familiar with .crt server certificate files because certificates are often issued by unknown authorities, which is the subject that affects security credentials and information encryption public keys.

Authentication failures are common, but it is important to understand the cause of the error, the possible impact, and how to fix it.

Check the log files and network traffic and use the correct Linux command to troubleshoot the connection. For example, the tcpdump command can check network traffic and locate which port is using the connection. This command locates the protocol and makes it easy to find out if there are secure or insecure ports that may be the source of connectivity problems.

4. My SSH server is often disconnected. What should I do?

Secure Shell (SSH) connections allow administrators to connect remotely to Linux and Unix systems, but disconnection from the server can also occur, which is also physically inevitable. This is not a good thing, and the problem increases as the number of servers logged in at the same time increases.

SSH closes idle connections to recycle resources. This inadvertently causes the system administrator to disconnect.

When faced with frequent disconnections from the server, you can adjust two resource configurations when troubleshooting: the ClientAliveInterval parameter and the TCPKeepAlive parameter. The ClientAliveInterval parameter is used to set the SSH daemon to periodically check whether the connection is still in use.

For example, the SSH server will check if the connection is still in use every 400 seconds. TCPKeepAlive is used to determine whether the SSH session is still active. If you want the session to remain idle for a while after you leave the server to connect remotely, extend these two parameters. The Linux server does not start properly, and the old method used before is no longer applicable.

5. The server cannot start properly, and the old method is no longer applicable.

If you get used to the previous generation of Linux distributions, such as Red Hat Enterprise Linux 5, you will find that in the latest version, GRUB2 and systemd have changed the way system administrators troubleshoot failure to start the system properly, and need to restore critical tasks.

In RedHatEnterpriseLinux7,SUSE Linux Enterprise Server 12, several startup options have changed. For example, the runlevel option has been removed from both distributions. Instead, there is a set of systemd services, called Systemd.units, which replaces the rescue and emergency patterns.

Once you are familiar with how to change the GRUB2 default settings, it will be easier to troubleshoot the new version of Linux server. If something in the GRUB2 bootstrapper prevents the server from starting properly, the system administrator needs to modify the GRUB2 setting to repair the configuration. But the GRUB2 configuration files themselves cannot be modified, and they must depend on the input file.

What are the easier ways to make Linux troubleshooting shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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