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Install MySQL using yum or up2date for Linux There are many ways to deploy MySQL database, including yum installation, RPM installation and compilation installation. Each installation method has its own advantages, so enterprises usually use rpm and binary installation. Download address of database official website: https://downloads.mysq ...

Ansible overview Ansbile is an it automation tool. It can configure the system, deploy software and coordinate more advanced IT tasks, such as continuous deployment and rolling update. Ansible is suitable for managing enterprise IT infrastructure, from a small scale with a few hosts to an enterprise environment with thousands of instances. An ...

Implementation principle of DHCPDHCP definitionDHCP Dynamic Host Configuration Protocol (DHCP) is a local area network protocol, which uses UDP protocol to work. It is a popular Client/Server protocol, which is generally used to specify relevant configuration information for hosts or routers. DHCP service has been widely used in enterprises and ...

UNIX interprocess communication mode catalogue 1. Unnamed Pipes 2. Famous pipeline3. Shared memory4. Message queue5. Signal lamp 1. Unknown pipeline 1.1example: 1.1. 1. Anonymous pipeline is a half duplex communication mode. When both parties need to communicate, two pipelines need to be established, which can only be used for communica ...

1, Concept of rules In the description of the last blog, we always mentioned the rules, but we didn't elaborate. Now let's talk about it. First talk about the concept of rules, and then explain it in a popular way. Rule: try to match each message flowing through here according to the specified matching conditions. Once the matching is successf ...

Write before: It is recommended that ubuntu be installed in dual system mode, and virtual machines are not recommended. Strange errors will occur, resulting in failure to configure the environment. This tutorial uses Ubuntu 18 04. For dual system installation, please search the tutorial installation by yourself. My graduation project is about ...

1, Create template machine 1.1. Modify the IP settings in the configuration file vim /etc/sysconfig/network-scripts/ifcfg-ens33 #Modification: ONBOOT=yes BOOTPROTO=static IPADDR=192.168.150.211 NETMASK=255.255.255.0 GATEWAY=192.168.150.2 DNS1=192.168.150.2 1.2 modify the host name to hadoop01 vim /etc/hostname 1.3 restart network servic ...

Command introductionThe locate(locate) command is used to find files or directories. The locate command is much faster than find -name because it does not search for a specific directory, but instead searches for a database, / var / lib / mlocate / mlocate db . This database contains all local file information. The Linux system automatically c ...

outline fio is a very flexible io testing tool. It can simulate various io operations through multiple threads or processes With the development of block devices, especially the emergence of SSD disks, the parallelism of devices is becoming higher and higher. To make good use of these devices, a trick is to improve the iodepth of the device, ...

Article catalog Principle of file deletion in Linux operating system What should we do if we delete files or data by mistake? Experimental ideas: 1 . Add new hard disk 2. Partition 3. Use the new partition table to format and mount: 4. Copy some test files, delete them, and then demonstrate recovery: 5. Install extundelet to restore files Upl ...