What kind of operating system is linux?
Linux is a free and open-source UNIX-like operating system.Linux is explained in English as LinuxisnotUnix.Linux was founded in 1991 by Linus Torvalds, who attended the University of Helsinki, and was largely inspired by Minix and Unix ideas.
Linux follows the GNU General Public License (GPL), which allows any individual or organization to freely use all of Linux’s underlying source code, as well as freely modify and redistribute it. Since Linux is free software, anyone can create a Linux distribution that meets their needs.
Along with the development of the Internet, Linux has received support from software enthusiasts, organizations, and companies from all over the world. It has made great strides in personal computers, in addition to maintaining strong momentum in servers.
Users not only have intuitive access to the operating system’s implementation mechanisms, but they can also modify and refine Linux to maximize its adaptability to their needs.
Linux is characterized by open source, no copyright, and a large number of users in the technical community. The open source code allows users to cut freely, with high flexibility, powerful functions, and low cost. The system is embedded in the network protocol stack, after appropriate configuration can realize the function of the router. These features make Linux an ideal development platform for developing routing and switching devices.
What is linux an operating system
Linux is a free-to-use and freely distributed Unix-like operating system that is multi-user, multi-tasking, and supports multi-threading and multi-CPU. It runs major Unix utilities, applications, and network protocols, and supports both 32-bit and 64-bit hardware.The Linux operating system inherits Unix’s network-centered design philosophy, and is a stable multi-user network operating system.
Linux operating system features are many, the following is a detailed introduction:
①Stable system: Linux is very stable, continuous operation for more than a year without ever downtime is a very common thing, Linux has a large number of computer experts in the use of numerous maintainers, maintenance, update fast, and Windows is everyone will use, and not open source multitasking.
②Multi-user system: a Linux host to plan out different levels of users, each user can be different when logging in the work environment, but also allows different users to log in at the same time in order to use the host’s resources.
3) User Group Planning: On a Linux machine, files can be categorized as readable, writable and executable. In addition, these attributes can be divided into three categories: the file owner, the file belongs to the user group, other non-owners and user groupers, for the project or other project developers have good confidentiality.
4 occupy fewer resources: any personal computer on the market now can reach the use of Linux to build a service more than hundreds of hosts can be customized to cut, ported to the embedded platform, you can choose from a variety of graphical user interface.
⑤ modular program: Linux kernel design is very delicate, divided into process scheduling, memory management, inter-process communication, virtual file systems and network interfaces in five major parts; its unique modular mechanism can be based on the user’s needs, real-time insertion of certain modules or removed from the kernel, so that the Linux system kernel can be tailored to be very small.
6 Wide range of hardware support: Linux can support a variety of architectures and microprocessors such as X86, ARM, MIPS, ALPHA and PowerPC. It has been successfully ported to dozens of hardware platforms and can run on almost all popular processors.
What kind of operating system is linux?
Linux is a free, open source Unix-like operating system. Linux has many advantages over commercial operating systems such as Windows, such as high stability, security, flexibility, customizability, and so on.
The history of Linux can be traced back to 1991, when a Finnish university student named Linus Torvalds began writing a new operating system kernel that was originally developed to run the Minix operating system on his personal computer. Over time, the Linux kernel was refined and became a standalone operating system.
Linux uses a Unix-like design and architecture and supports multi-user and multi-tasking. It has good network functions, powerful command-line operation tools and rich applications, and can be widely used in servers, desktops, embedded devices and other fields.
1) Linux operation and maintenance positions and job content
Internet Linux operation and maintenance engineers are a comprehensive technical position that integrates multiple disciplines (network, system, development, database, security, storage, etc.), and even requires non-technical skills such as communication, people skills, training, sales, management, and so on, which gives operation and maintenance engineers a broad space for development.
2) Linux operation and maintenance engineer job responsibilities
Generally from the enterprise entry to intermediate Linux operation and maintenance engineer’s work are: selection of IDC server room and bandwidth, the purchase of physical servers or cloud services, the purchase and use of CDN services, set up and deploy the program development and the user’s access to system environments (for example: website operating environment), data backup and recovery, dealing with various kinds of website operation. Recovery, dealing with various failures in website operation (e.g. hardware failure, software failure, service failure, data damage and loss, etc.), monitoring website failures, solving potential security problems in website operation, developing automated script programs to improve work efficiency, planning website architecture, program release process and specifications, formulating operation and maintenance system and specifications, cooperating with developers to deploy and debug the testing environment, code release, etc. required for product development and development, and providing support to developers. The company may also be part-time network administrator, network engineer, database administrator, security engineer, technical support and other duties if the company is small.
Involved in the Linux platform on the operation and maintenance tools are: Linux system, Linux basic commands, Nginx, Apache, MySQL, PHP, Tomcat, Lvs, Keepalived, SSH, Ansible, Rsync, NFS, Inotify, Sersync, Drbd, PBD, PBD, PBD, PBX, PBX, PBX, PBX. Drbd,PPTP,OpenVPN,NTP,Kickstart/Cobbler,KVM,OpenStack,Docker,,K8S,Mongodb,Redis,Memcached,Iptables,SVN,GIT,Jenkins,Networking Fundamentals,Shell/Python Development Fundamentals, etc.. Python development basics, etc., in addition to the knowledge of switches, routers, storage, security, development, etc. may be involved.
Operation and maintenance engineers also include some low-end positions, for example: network administrator, monitoring and maintenance, IDC operation and maintenance, on-duty operation and maintenance
Career development direction: Linux operation and maintenance engineers, system architects, database engineers, operation and maintenance development engineers, system network security engineers, operation and maintenance manager, operation and maintenance director
3) Linux intermediate operation and maintenance Engineer application software stage.
Linux system, Linux basic commands, Nginx, Apache, MySQL, PHP, Tomcat, Lvs, Keepalived, SSH, Ansible, Rsync, NFS, Inotify, Sersync, Drbd, PPTP, OpenVPN, NTP. Kickstart/Cobbler,KVM,OpenStack,Docker,Mongodb,Redis,Memcached,Iptables,SVN,GIT,Jenkins,Networking Fundamentals,Shell/Python Development Fundamentals
4)Linux Operations Architect Job responsibilities
1, automated code online (SVN/GIT+Jenkins+MVN) solutions;
2, cloud deployment architecture and Docker microservices architecture solutions;
3, service automation scaling solutions (KVM/OpenStack/Docker+Ansible+ Zabbix);
4, 100,000 concurrent website architecture, the architecture of the spike system and the solution to your case;
5, multi-IDC room interconnection program, the entire network data backup solutions, account unified authentication program;
6, clustering and high-availability solutions for the database, storage, and various important service nodes.
7, the extreme optimization scheme of each network service, service decoupling/splitting.
8, the construction and implementation of operation and maintenance processes, systems, specifications and so on.
9, communication skills, training skills, project management, business requirements analysis and implementation of the landing.
Career direction: senior database engineers, operations and maintenance development engineers, operations and maintenance manager, operations and maintenance director, technical director
Operations and maintenance architects: a combination of multiple tools, plus ideas and experience, the formation of the program, the stage of the ideas and experience to make money.
The improvement of technology is only the accumulation of quantity, the improvement of ideas is the qualitative leap! –Old Boy
5) Database Operations and Maintenance Engineer
As we all know, data is the lifeblood of almost all enterprises, so the status and salary of database engineers will generally be higher than the average operations and maintenance engineers, the main work is to ensure the safety of database data as well as to efficiently provide users with The main content of the work is to ensure the security of database data and efficiently provide users with a variety of services. The work mainly includes: database environment construction, database optimization, database