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awk of shell three swordsmen In Linux/UNIX system, awk is a powerful editing tool. It reads input text line by line, searches according to the specified matching mode, formats and outputs qualified content or filters it. It can realize quite complex text operation without interaction. It is widely used in Shell scripts to complete various aut ...

awk tools In Linux/UNIX system, awk is a powerful editing tool. It reads input text line by line, searches according to the specified matching mode, formats and outputs qualified content or filters it. It can realize quite complex text operation without interaction. It is widely used in Shell scripts to complete various automatic configuration ...

The difference between property and attribute <div id="div1" class="class-div1"> <P id="p1" data-name="p1-data-name">this is p1</P> <P id="p2">this is p2</P> </div> //property var div1 = document.getElementById('div1') console.log(div1.className) div1.className = ...

Expect overview Expect is a tool based on tcl. Expect is a tool for automatic control and testing. It mainly solves the problem of non-interaction in shell script. It's helpful for large-scale Linux operations and maintenanceIn the development of Linux operations and peacekeeping, we often need remote login server to operate. The login proces ...

Grep command 1. Examples of Basic Regular Expressions - Finding Specific Characters Here we will take the / etc/passwd file of all the local users as an example. Demo1 [root@localhost ~]# Grep-n "root"/etc/passwd//-n denotes the display line number 1:root:x:0:0:root:/root:/bin/bash 10:operator:x:11:0:operator:/root:/sbin/nologin 2. E ...

Setting up DNS separate parsing can provide different domain name parsing records for different clients. When a client from different addresses requests the same domain name, it provides different parsing results. Install the bind package [root@localhost ~]# yum install bind bind-utils -y Dual Network Card Configuration Both network cards ar ...

This article mainly describes how to build a custom YUM source, in a host environment with a large number of local networks, can reduce dependence on the external network. Server Install vsftp package [root@server ~]# yum install vsftpd -y Adding related resource bundles Create directories to store [root@server ~]# mkdir /var/ftp/centos7 /v ...

Implementing FTP File Transfer in Terminal Code structure: .├── client.py├── readme.txt└── server.py Operating screenshots:   readme.txt tftp file server Project function: * The client has a simple page command prompt * Functions include: 1. View the File List (Ordinary File) in the Server File Library - > os. ...

Purpose of this chapter: Client Centos7-1 can enjoy the YUM repository of remote server Centos7 This chapter environment: a server Centos7, a client Centos7-1, VM Virtual Machine 1. Install vsftpd service [root@localhost ~]# yum install vsftpd -y Loaded plug-ins: fastest mirror, langpacks Loading mirror speeds from cached hostfile * base: m ...

When installed on a large scale, it is easy to operate manually and improve efficiency by using unattended equipment. PXE Network Installation Configuration of Dual Network Cards Here, ens33 is a nat network, ens37 is a host-only network, and ens37 is configured. [root@localhost ~]# cd /etc/sysconfig/network-scripts/ [root@localhost networ ...