Linux

Operating system consists of-kernel-hardware-command interpreter programDevelopment History of Linux1969 Unix Born in Bell Labs1977 Unix was born a more important branch BSD system, since then the major manufacturers began to develop UNIX billing

What do you see in a directory (folder)? ------------ls-lWhere is it? -----------------pwdChange Path-----------------CDCreate directory-----------------mkdirDelete directory-----------------Rfdir can only delete empty directoriesRM can delete files

Initialize with a command link GitHubNeed to link to GitHub with SSH public key, note that you cannot copy directly from Vimintroducing a command : Xsel Copy the contents of a file directly into the ClipboardSpecific practicesgit remote add pprp www.

Glances is an open source command line system Monitoring tool for Linux and BSD, which is developed using the Python language and uses the Psutil library to capture system data and monitor CPU, load, memory, disk I/O, network traffic, file system,

First, IntroductionThe Linux RM command is used to delete files or directories. Syntax: RM [Options] .... File.....Second, common options-F,--force forcibly removed. Ignore files that do not exist, do not prompt for confirmation-I need to confirm

Linux Boot Process learning post (load BIOS)无论什么机器，在开机后都要进行通电自检(硬件)，如果硬件有问题，则无法继续下去。(例如当内存条松动时或者损坏，就会发出嘀嘀嘀警报声)。接着开始加载BIOS（Basic Input Output SystemBIOS是一个写入到主板上的一个软件程序。BIOS会去分析计算机里面有哪些存储设备，从默认的第一启动项开始启动。MBR and boot

Ubuntu:1. Download the. deb file, download the CD to the. deb file directory, and then use the Dpkg-i xxx.deb Dpkg=debian Packager abbreviation-i=install2..tar.gz file, Tar-zxvf xxxx.tar.gz extract. tar.gz file, unzip, CD to file directory, and then

First, IntroductionThe Linux WC command is used to count the lines of a file, the number of words, is an external command. Syntax: WC [option]Second, common options-L: Total number of rows in the statistics file-L: Statistics the longest line length-

Install nodejs v8.0.0 and centosnodejs on centos Create a www directory Download nodejs wget https://npm.taobao.org/mirrors/node/v8.0.0/node-v8.0.0-linux-x64.tar.xz Extract tar -xvf node-v8.0.0-linux-x64.tar.xz Test whether the installation is

Basic usage of vi/vim in ubuntu, ubuntuvim1 Overview Vim is a text editor. Code Completion, compilation, error jump, and other convenient programming functions are particularly rich and widely used by programmers. The following describes some

Linux System Study Notes, linux Study Notes1. Briefly describe the TCP three-way handshake four-way handshake process and the status of the client and server in each process. In TCP/IP, TCP provides reliable connection services and uses three

In linux, how does one view disk space usage ?, Linux disk space At work, sometimes the allocated Test Machine space is not large, and the disk space is often full. The Troubleshooting process is as follows: 1. Run the df-h command to view the

Centos7.2 64-bit LVS + Keeplived high-availability multi-instance installation and deployment tutorial, centos7.2lvs How to install and deploy 64-bit LVS + Keeplived high-availability multi-instance in Centos7.2 Software packages required for system:

Nginx overview and installation configuration, Nginx overview and installation Configuration 1. Overview Nginx is an open-source, high-performance Http and reverse proxy server. It is also an IMAP, POP3, and SMTP proxy server. Nginx can be used as

Ssh password-free login, ssh password login Ssh password-free Login Note: Ssh password-less logon requires the public key and private key. In linux or mac systems, you can use ssh-keygen to generate public/private key pairs.   1. Generate a

Linux system learning-Development Board familiarity and experience, linux -- Linux system learning-familiar with and experienced the Development Board.Section 001st: Introduction of the Development Board Components and operations on the Development

Centos-Virtual Machine installation Republican-related configuration, centos-Virtual Machine 1. Create a Virtual Machine (the view that does not appear in the notes can be installed by default, and the green background image should not be too

Zabbix fault: Apache source code and PHP red prompt on the page Yesterday, I installed ansible-tower on this machine, and then occupied the original nginx, forcing zabbix web to be replaced with apache. After installing apache in the source code and

Zabbix monitors Nginx, PHP, and Memcached statuses Create a sub-configuration file for zabbix_agentd Create a sub-configuration file associated with nginx status and php-fpm status in/etc/zabbix/zabbix_agentd.d/, or add it to an existing

HttpClient optimization in high concurrency scenarios 1. Background We have a business that calls an http-based service provided by other departments, with a daily call volume of tens of millions. Httpclient is used to complete the business.