Programmer Think

1. rsync overview 1.rsync is an open source, fast, multi-functional and excellent tool that can realize full and incremental synchronous backup of local or remote data. It can realize the backup and migration characteristics of data without changing the attribute information of the original data. In short, it is replication, which can be u ...

1. What is IP ADDRESS internet protocol ADDRESS ## network process address ipv4 internet protocol version 4 (for specific sub protocols, please refer to the network protocol.) ip is composed of 32 01s 11111110.11111110.11111110.11111110 = 254.254.254.254 The ip address consists of network bits and host bits, One 0 and one is called 1bit. 8bit ...

grid mutual trust configuration Mutual trust configuration: connect two virtual machines. Node 1 virtual machine can operate node 2 virtual machine by entering password. First, let's understand the difference between rsa and dsa? DSA signature is faster, but validation is slower. A DSA key of the same strength as RSA (1024 bits) generates a ...

Remote access and control of [Linux dictionary] preface SSH is basically used for remote management of linux systems. The reason is very simple: Telnet, FTP and other transmission methods transmit user authentication information in plaintext, which is inherently unsafe and has the risk of being eavesdropped by the network. SSH (Secure ...

HTTP + SSL/TLS = HTTPSSSL(Secure Sockets Layer)TLS(Transport Layer Security)HTTP(HyperText Transfer Protocol) enables clear text data exchange between computers. The default port is 80HTTPS(HyperText Transfer Protocol Secure) encrypts data with SSL/TLS, and then transmits it through HTTP to ensure data security. The default port is 443Differenc ...

1: Foreword The Linux scp command is used to copy files and directories between Linux. scp is the abbreviation of secure copy. scp is a secure remote file copy command based on ssh login in linux system. scp is encrypted, rcp is not encrypted, and scp is an enhanced version of rcp. scp command can also be used under Windows system, so we ...

Experimental environment: westos-vmctl reset nodea westos-vmctl reset nodeb In the virtual machine nodea:   Perform the same operation in the virtual machine nodeb:   hostnamectl set-hostname westoshost139.westos.org      ## Modify virtual machine name 1, Openssh features 1. Purpose of sshd service ...

New Folder: Compressed Package Folder, Software Installation Directory Folder The following does not indicate which host operations are all Master host operations # Recursively Create Compressed Package Folder mkdir -p /usr/tar # Recursively create the software installation directory folder mkdir -p /usr/apps Install upload and color code c ...

Preface: last time, I shared Maven of SSH framework with you. Today, I share struts of SSH framework with you. Struts is very similar to the custom MVC shared with you earlier, but there are also differences. Next, I will share my knowledge with you 1, Clear objectives:         1. struts configuration     &nbsp ...

Mybatis Plus Today's goal: Understand the features of mybatisplusGet started with mybatisplusBe able to master the common annotations of mybatisplusBe able to master the common additions, deletions, modifications and queries of mybatisplusBe able to master mybatis plus automatic code generation 1 MybatisPlus overview MyBatis plus (MP for sh ...