Programming VIP

1. Premise jenkins plug-in address: http://updates.jenkins-ci.org/download/plugins/ 192.168.211.90 gitlab,jenkins,Maven192.168.211.91 git,httpd192.168.211.92 nexus,sonarqube,docker-ce 192.168.211.93 this is a separate environment for testing jenkins and docker Turn off the firewall # systemctl disable firewalld.service close Networ ...

4.4 touch screen application interface 4.4.1 introduction to input subsystem There can be more than one input device connected to the operating system, perhaps a standard PS/2 keyboard, perhaps a USB mouse, or a touch screen, or even a game console joystick. When dealing with these complex and different input devices, Linux still uses the mid ...

File open, file write, file read, file close, file cursor lseek, file create The general process of a file is to open or create a document - edit the document - save the document - close the document. The api (Application Programming Interface) provided by liunx file operation includes open, write, read, close, lseek, create, etc. File op ...

1. Wildcard 1.1 effect on documents *: matches any 0 or more characters or strings, including empty strings [root@VM-0-17-centos ~]# rm -f *.sh ?: Match any 1 character [root@VM-0-17-centos ~]# ls ?.* a.out [root@VM-0-17-centos ~]# ls ????.* # Can be used multiple times info.txt test.sh 1.2 action on file / character [abc ...

Experimental environment systemctl stop firewalld 1.journald Service Name: SYSTEMd journal service journalctl Default log storage path: / run/log Experiment 1 usage of journalctl command journalctl -n 3 ## latest 3 entries in log --since "2020-05-01 11:00:00" ## displays the log after 11:00 --until "2020-05-01 11:05:00&quot ...

openvpn version: 2.5.2 Server installation mode: source code compilation and installation Certificate generation method: easy RSA 3 Server configuration Compile and install openvpn source code download address Easy RSA download address # system configuration echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf sysctl -p /etc/sys ...

What is GoAccess GoAccess is an open source, real-time Web log analysis tool running under the command line terminal. The tool provides fast and diverse HTTP status statistics. The analysis results can be viewed through client tools such as XShell, and Html reports can be generated. GitHub address: https://github.com/allinurl/goaccess Offi ...

Producer consumer model Why use the producer consumer model Producer consumer model is to solve the strong coupling problem between producers and consumers through a container. Producers and consumers do not communicate directly with each other, but communicate through the blocking queue. Therefore, after producing data, producers do n ...

preface Although relational database is widely used, its performance is relatively poor in the face of current data access. At this time, his good friend non relational database appeared. Enterprise development generally combines the two. Next, we will introduce the non relational database Redis (it is said that Redis was originally deve ...

Common Linux commands 1. File operations 📂 cd # Enter Directory cd .. # Return to the previous directory pwd # Show working paths ls # View files in the current directory ls -a # Hidden files can be displayed ls -l # View file details ls -la # View all file details cat # View the entire contents of the file vim # Edit file: [i] E ...