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Article directory I. Unloading openjdk 1. View the openjdk version 2. Unload openjdk Download jdk1.8 III. Installation of jdk1.8 Method 1. Manual configuration 1. Preparing jdk files 2. Configure `etc/profile'` 3. Make `etc/profile'effective Method 2. Installing binary packages Off-topic: Insta ...

Many people will struggle between saltstack and ansible. Whether saltstack is good or ansible is good. First of all, we should realize the advantages and disadvantages between them.Saltstack is based on zero mq messaging system, which can achieve high concurrency (theoretically, a salt-master can concurrently run 1000 minions in a short time), ...

In the actual production environment, there will always be some regular tasks, such as data backup, we can not always wait until that time to perform manually, then planning tasks will come into use. One-time Planned Tasks at One-time Planned Tasks at [HH:MM] [YYYY-MM-DD] Set up, press Ctrl + D to exit 1. Get the current time of the system ...

YUM overview YUM Software Update Mechanism Based on RPM Package Construction Automatically resolving dependencies All packages are provided by a centralized YUM software repository The Way of Providing Software Warehouse FTP service: ftp://... HTTP service: http://... Local directory: file://... Sources of RPM Packages Collection of RPM Packet ...

In Linux, the use of deleting rm commands should be cautious. Sometimes important files are deleted due to misoperation. At this time, don't be too nervous. If you operate properly, you can still recover. EXT Type File Recovery Deleting a file does not actually clear the inode node and block data, but deletes the name of the file in the block ...

As an open source operating system, Linux server is widely used because of its security, efficiency and stability. However, if it is not controlled, there is no safe place to go. This blog mainly focuses on account security control, system boot and login control to achieve Linux system security. Change. And use auxiliary tools to find potentia ...

The shell script is multithreaded, which is somewhat difficult to understand because it is implemented with named pipes. Multithreading means that what was originally done by one process is now done by multiple threads. If a process needs 10 hours to complete something, now allocate 10 threads, divide them up, and then do it at the same time, ...

Environmental Science: 192.168.205.37: as MHA server 192.168.205.47: as Master server 192.168.205.57: as Slave1 server192.168.205.67: as Slave2 server Edition: OS: centos 7 1810 with mini install mariadb-server 5.5.60mha4mysql-manager-0.56-0.el6.noarch.rpm mha4mysql-node-0.56-0.el6.noarch.rpm Purpose: MHA uses a program written in perl scrip ...

Original Link: http://www.cnblogs.com/cgfree/p/5397890.html This tutorial describes how to install and CentOS Configure the latest on servers 7, 6.5, and 6.4 Oracle JavaJDK for.Although these steps should also apply to other RPM-based d ...

Redis Master-slave + sentinel installation Pre-installation preparation 1. Machine preparation 5 sets 1 master node, 1 slave node The other three install one sentinel 2. Installation package preparation, version 3.2.9 3. Installation environment Check by command gcc-v that the following comma ...