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This article introduces the relevant knowledge of "four suggestions for novice learning Linux system". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

First, make a good backup

Get into the habit of backing up and then operating when modifying or deleting relevant data. For example, when you want to modify the configuration file, it is recommended to comment on the original option, and then copy and modify it. If you want to modify the data of a database, it is best to fully back up the entire database first, and then modify the operation, so that even if the modification is wrong, you can restore the backup and reduce the loss.

Of course, for the operation of the database, it is best not to operate directly in the database, but through the software matched with the database. Although the operation through the software may (mostly) be much more troublesome than operating directly in the database, it can keep the data relationship as accurate and complete as possible and avoid all kinds of logic errors.

You know, in practical work, data is more important than anything else, the importance of data is more important than you think, and all operations involving data cannot be too careful.

Second, update carefully

In fact, not only Linux, for all servers, stability is greater than everything else, not the fastest, but the most stable, the so-called speed, function, to be basically stable on the basis of implementation, otherwise it is meaningless.

So if not tested, do not directly use the new software on the server, of course, with the exception of software updates involving major vulnerabilities, if there is no security, stability is useless.

Third, pay attention to safety

The importance of security is self-evident. In order to make the server more secure, sometimes some speed and performance have to be sacrificed. There are many ways to ensure server security, such as disabling root users, changing the default port numbers of ssh and other programs, limiting firewall ports, being able to use services initiated by ordinary users, not using root, and keeping all kinds of service permissions to a minimum. In addition, third-party software can be used to always detect changes to system key files and various service configuration files, such as / etc/passwd,/etc/my.cnf,/etc/httpd/con/httpd.con, etc. Linux commands use a centralized log monitoring system to monitor / var/log/secure,/etc/log/message,ftp uploads and downloads files and other alarm error logs In addition, for port scanning, you can also use some third-party software to find that it is scanned and directly pulled into the host.deny. This information is very helpful for troubleshooting after the system has been invaded.

Security is a big topic, but it is also a very basic work. If the foundation is done well, the security of the system can be quite improved. For novices in Linux operation and maintenance, they only need to do the foundation well, and the rest is done by security experts.

Fourth, keep a state of mind

For beginners in Linux operation and maintenance, it is possible that after the first one or two months of freshness and curiosity, they get tired of the almost constant work life and lose their initial enthusiasm for Linux operation and maintenance work, which is also a necessary process for most people who have just entered the workplace. At this point, you can slow down your work a little bit and think about why you chose Linux operation and maintenance in the first place. Think about how much you have paid, is it a pity to give up now? Does your current job teach you anything new? What do you have to do in order to improve your work ability.

This is the end of the introduction of "four suggestions for novice learning Linux system". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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