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Editor to share with you what Linux operation and maintenance refers to. I hope you will gain a lot after reading this article. Let's discuss it together.

Now when we talk about operation and maintenance, we often talk about the word magnanimity. When an enterprise has hundreds of servers, it may pay more attention to how to meet the application / business needs. More often, it does not have to pay too much attention to the architecture, capacity, scalability and so on. The operation and maintenance department is sometimes even reduced to a chores department. However, when an enterprise has tens of thousands or even hundreds of thousands of servers, it will pay more attention to architecture planning and evolution, quality, capacity, cost management, automatic deployment, and so on. At this time, we hear that the word is more about operation than operation and maintenance. Yes, for operation and maintenance personnel, different volumes of operation and maintenance actually do two completely different things, the difficulty is also completely different, and the ability requirements and value embodiment of operation and maintenance are also completely different. To sum up, it is the massive operation and maintenance environment that can reflect the value of operation and maintenance engineers, of course, the more promising.

What is Linux operation and maintenance?

It can be summed up in one sentence: maintain the Linux operating system and the related software services, program code and enterprise data above the system, so that the enterprise can provide high-quality, efficient and fast service for its customers.

The basic knowledge that linux operation and maintenance need to master

1. Shell script and another scripting language, shell is a must for operators. If you don't understand this, you can't even get started. At least you have to write some system management scripts. The simplest thing is to write a script that monitors CPU and memory ratio. This is the most basic and meaningful, while the other scripting language is optional, which is generally 3P, that is, python, perl and php,php, and you don't need to consider it unless you want to do development. I personally suggest that learning python will be better, it is difficult to achieve automated operation and maintenance, perl is very powerful text processing, anyway, just learn one of the two.

2, sed and awk tools, we must master, while mastering these two tools, but also to master regular expressions, which is painful, regular is the most difficult to learn expressions, but the combination of sed and awk will be very powerful, in dealing with text content and filtering WEB content is very useful, but in learning shell at the same time will often be used in combination.

3, text processing commands, sort, tr, cut, paste, uniq, tee, etc., must be learned, but also combined with shell scripting language to learn.

4. Mysql is the first choice for database, because linux is absolutely used by mysql, and you must learn to add, delete, modify and check, especially to learn to check it well. Other aspects may not be needed, because operation and maintenance personnel still use it most.

5, firewall, is also a must, firewall is also a difficulty, the most important to understand the rules, if you have learned CCNA friends may be easier to learn, because iptables also has NAT table, the principle is the same, and FILTER table is the most used.

6, monitoring tools, very important, personal advice, it is best to learn these three, cacti,nagios,zibbix, enterprises should use nagios and zibbix, but nagios will be a little difficult, because it will involve using scripts to write automatic monitoring, that place is very difficult.

7, clustering and hot backup, this is very important, certainly to understand, but to the company will not let you do, because the novice basically do not let you touch, there are many cluster tools, the best to learn is LVS, this is a must, it is best to learn nginx clusters, reverse proxy, and hot backup, this is more tools can be realized, mysql hot backup to learn, that is, master-slave replication, this is not easy, to learn the whole process is not easy.

8, data backup, is also necessary to learn, there are many tools, but at least to understand the principles of RAID, especially the most commonly used enterprises 1: 0 or 0: 1, to do their own experiments to get out, there are many backup tools, such as tar, dump, rsync, etc., it is best to know more.

Another key word in the question is cloud computing. Because of its own characteristics, public cloud is to provide cloud computing services for other enterprises, so it must be determined that its volume must be huge, and there is a very big difference between public cloud operation and traditional operation and maintenance. Traditional operation and maintenance are their own business and can coordinate changes and downtime windows with business units, while public cloud is all customer business, so it is difficult to judge user behavior, so the requirement is absolutely stable. Change interruptions are required to be imperceptible, which increase the difficulty of public cloud operation and maintenance. Therefore, compared with public cloud transportation and general operation and maintenance, the technology is more difficult and requires stronger operational capabilities and technical foresight. Of course, the prospect is a little better than the traditional operation and maintenance, after all, such a large amount of Infrastructure is not available to ordinary companies.

After reading this article, I believe you have a certain understanding of what Linux operation and maintenance refers to, want to know more related knowledge, welcome to follow the industry information channel, thank you for reading!

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