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1. Install ansible package [root@centos8 ~]yum -y install ansible 2. Modify profile ###Purpose: to cancel the error (yes/no) that occurs every time you connect to the remote host [root@centos8 ~]#vim /etc/ssh/ssh_config #Modify the following line StrictHostKeyChecking no perhaps [root@centos8 ~]#vim /etc/ansible/ansible.cfg Uncomment the ...

Run a simple Grpc Previously, we successfully installed the Go + running environment. Next, we run a simple Grpc to learn how to reference packages. Dependent package installation For references to dependent libraries, Go + has made many optimizations to make the code easier to write. Just like when printing, Go needs to import "f ...

leetcode - 235. Nearest common ancestor of binary search tree Given a binary search tree, find the nearest common ancestor of two specified nodes in the tree. Baidu Encyclopedia defines the nearest public ancestor as: "for two nodes p and q with root tree T, the nearest public ancestor is expressed as a node x, which satisfies that x ...

Modify permissions: Add Account: Add normal users: useradd guest;echo 'guest:123456'|chpasswd Add root user (mentioned above) echo "test:advwtv/9yU5yQ:0:0:,,,:/root:/bin/bash" >>/etc/passwd Account: test Password: password@123 It's easy to add an account to maintain permissions. Defense method: Query Privileged User Privi ...

1. Preparation before construction 1.1 ssh password free login configuration method Prepare at least three host servers. For example, my host servers are: Server nameIPServer master81.68.172.91Server slave1121.43.177.90Server slave2114.132.222.63 First, generate the secret key on the master server. The command to generate the secret key ...

1, Openssh features 1. Purpose of sshd service effect: You can open the secure shell in the remote host through the network Secure shell > > > SSH ## client Secure shell daemon > > > sshd ## server 2. Installation package openssh-server 3. Master profile /etc/ssh/sshd_conf 4. Default port port 22 5. Client commands ...

This article will explain based on Maven project. If you don't understand maven, you can refer to the previous article published   Rely on the downloaded Maven website: https://mvnrepository.com/   Struts2   What is struts? A web application framework designed based on mvc pattern is an upgraded version of struts 1, which ...

Linux Walking into Linux system Generally speaking, there are three ways for users to log in Command login ssh login Graphical interface login The highest authority account is root, which can operate for everything! Shut down Shutdown command shutdowm sync Synchronize data from memory to hard disk shutdown Shutdown command, you ca ...

1, SSH service 1.1 SSH Foundation 1.1.1 what is an SSH server? SSH (Secure Shell) is a secure channel protocol, which is mainly used to realize the functions of remote login and remote replication of character interface;SSH protocol encrypts the data transmission between the communication parties, including the user password entered when ...

An introduction to rsync rsync is a common Linux application for file synchronization. It can synchronize files between local computers and remote computers, or between two local directories (but it does not support synchronization between two remote computers). It can also be used as a file copying tool instead of cp and mv commands. r refers ...