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write explain Command name: write Command path / usr/bin/write Execute permission: all users Function Description: send information to the user, and save with Ctrl+D grammar Write < user name > Example # Send a message to tenentity write eternity [root@izm5e2q95pbpe1hh0kkwoiz ~]# write eternity write: eternity is logged in more than o ...

Catalog man whatis apropos --help info help man explain Command name:man Command English original meaning:manual Command path: /usr/bin/man Execution rights: all users Function description: Get help information grammar man [command or configuration file] Example #View help for ls command man ls Page Down with Space Page Up U ...

rpm can realize fast and simple installation of programs (compared with compilation and installation), but rpm can't solve dependency by itself, so many tools come into being to solve dependency automatically, among which yum is one of them. yum solution to dependency: There must be a file server where all the rpm packages and the package rel ...

Graylog build configuration (centos7) 1, Basic environment 1. jdk environment required: [root@iz2zee3zwuvnmai605c99vz ~]# java -version openjdk version "1.8.0_171" OpenJDK Runtime Environment (build 1.8.0_171-b10) OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode) //If not, you need to install it. He ...

In Centos/RHEL system, the file to configure the yum warehouse is the. Repo file under the directory / etc/yum.repo.d /. In Ubuntu system, it is the / etc/apt/sources.list file The first element of configuring system files is to back up files. Generally, system files are kb level files, which don't oc ...

Reference resources: https://blog.csdn.net/linuxnews/article/details/51106905 Environment Configuration: Local ip:192.168.1.41 Set Host Name hostnamectl set-hostname mail.jlkj.com Add hosts echo "192.168.1.41 mail.jlkj.com" >> /etc/hosts Turn off the firewall: sed -i 's/SELINUX=enforcing/SELINUX=disabled/ ...

k8s general environmental plan Environmental equipment Two master nodes, two node nodes and two node nodes are installed with nginx for load balancing, failover and floating address vip Deployment process Turn off firewall and security functions systemctl stop firewalld.servicesetenforce 0 Copy the kubernetes directory to master2 (last exp ...

Through Bo Wen Storage Volume of Kubernetes It can be seen that the process of Kubernets to realize data persistence is as follows:Build NFS underlying storage - > create PV - > create PVC - > create podFinally, the container in the pod will realize data persistence! From the above process, it seems that there is no problem, but after ...

Key points: 1. Experimental environment 2. Load balancing scheduler deployment 1, Experimental environment: Based on the previously deployed multi Master cluster architecture, deploy two scheduler servers (nginx is used here) to achieve load balancing: Deployment 1 of kubernetes binary cluster - deployment of etcd storage component and flan ...

Based on the previously deployed multi Master cluster architecture, deploy two scheduler servers (nginx is used here) to achieve load balancing:Again, the environment: role IP address master01 192.168.100.110 master02 192.168.100.109 Scheduler 1 (nginx01) 192.168.100.113 Scheduler 2 (nginx02 ...