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Common commands There are many commands in Linux. With the options of various commands, there are really thousands. How do we remember these commands? The answer is only two words: multi-purpose. We don't have many commonly used linux commands. As long as we use and practice frequently, we will master them quickly. For some uncommon commands, ...

Tuning system System administrators can adjust various device settings based on a variety of use case workloads to optimize system performance. The tuned daemon uses a tuning profile that reflects the requirements of a specific workload to apply tuning in both static and dynamic ways. Configuring the static tuning tuned daemon applies the ...

environmental information roleIPsystemmaster10.4.7.152Ubuntu18.04node10.4.7.162Ubuntu18.04 1. Operating system configuration (both nodes need to execute) Operation node: master, node Disable swap swapoff -a #temporary sed -ri 's/.*swap.*/#&/' /etc/fstab #take/etc/fstab Document swap Line use#Notes (permanently disabled) Turn off ...

Disk management - logical volumes introduce Introduction to logical volumes Logical volume manager is a mechanism used by Linux system to manage hard disk partitions The original intention is to solve the defect that the hard disk device is not easy to modify the partition size after creating the partition. Although it is theoretically fea ...

1: Experimental environment 1.1 environment: Huawei ensp software 1.2 equipment PC, router and switchTwo PC s in initialization state, two routers in initialization state and three switches 2, Experimental requirements SW1 and SW2 constitute the primary and secondary routes. When one party hangs up, the data will pass through the other party. ...

The hosts file is usually used when deploying a distributed cluster. We usually write in the ip address and host name. How to implement rendering when writing Ansible?Define the roles first [root@ansible kubeadm-high-install]# ls ansible.cfg group_vars hosts roles site-all.yml The first file takes the default etc/ansible cfg file and remov ...

Under the linux system, the disk is replaced, but for the HP array card, the common MegaCli, storcli and percli can not get the disk information. At this time, the special tool ssacli is needed.rpm package download address: https://downloads.linux.hpe.com/SDR/repo/mcp/centos/7/x86_64/current/ View raid card information (including controller st ...

docker start stop sudo systemctl start docker.service sudo systemctl stop docker.service sudo systemctl restart docker.service sudo systemctl status docker.service sudo systemctl enable docker sudo docker ps -a ## <-- List existing images ## sudo docker stop 17dd4ab4cda2 ##<-- 17dd4ab4cda2 by container id ## sudo docker rm 17dd4ab4cda ...

1. First of all, I do not need to install x-pack separately when the ES version of single instance and single node is 7.7 { "name" : "node-1", "cluster_name" : "myes", "cluster_uuid" : "OGiYluA_Sxynl2bXl1TcbQ", "version" : { "number" : "7.7.0", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "81 ...

Environmental inspection Enter root All of the following are performed as root sudo -i View Linux distribution [root@localhost ~]# cat /etc/os-release NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7 ...