Programming VIP

Confirmation before installation Operating system: host name, IP address, hairstyle version, kernel version [root@localhost ~]# hostname localhost.localdomain [root@localhost ~]# [root@localhost ~]# ip -4 a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN inet 127.0.0.1/8 scope host lo valid_lft forever p ...

file module The keywords of this module include path, path of the controlled host, state status, touch to create file, directory to create directory, recursion, owner's master, group, and mode permission. 1. Create a file and set the owner, group and permission [root@localhost opt]# ansible dbserver -m file -a "path=/var/www/html/xjm.html st ...

acme.sh overview An ACME protocol client written purely in Shell (Unix shell) language.Complete ACME protocol implementation. Supports ACME v1 and ACME v2 wildcard certificatesSimple, powerful and easy to use. You only need 3 minutes to learn it.Let's Encrypt free certificate client is the simplest shell script.It is written purely in Shell an ...

Problem description In the struct dirent returned by the operation readdir or scandir, d_name will cause an error, and the subsequent file name output will become very strange. The complete file name cannot be output, or other errors. Examples of error codes are as follows #define _DEFAULT_SOURCE #include <dirent.h> #include <stdio.h ...

1. Common system monitoring commands 1.1 problems In this case, you are required to be familiar with the common commands for viewing the Linux system status and prepare for further specific monitoring tasks: View memory informationView swap partition informationView disk informationView CPU InformationView network card informationView ...

Construction and use of ELK real-time diary platform What is ELK ELK is the acronym of Elasticsearch, logstash and Kibana (but the later filebeat (one of beats) can be used to replace the data collection function of logstash, which is lightweight). It is also known as Elastic Stack on the market. Elasticsearch: it is the core distributed sear ...

catalogue 1, Deploy docker steps 1. Operations on the master node 2. Operation on node1 node 3. Operation on node2 node 2, Install kubedm, kubelet, and kubectl 1. Specify installation source 2. Local mapping / etc/hosts 3. Specify installation version 4. Set startup and self startup 5. Close swap partition 6. The chain that passes br ...

Linux Process IntroductionIf you want to write a small program for calculating addition, the program needs to input from one file, and the results after calculation are input into another file.Because the computer only knows 0 and 1, no matter which language is used to write this code, it needs to be translated into binary files in some way in ...

Stand alone installation Front work Hardware requirements: 64 bit Linux/Unix/Mac/Windows4G and above disk space Software requirements: 64 bit JDK above 1.8Maven 3.2.xGit Installation: 1. Download the installation package 4.9. 2 download address 2. Upload the downloaded package to Linux It can be uploaded through rz command. For ot ...

Practice of Iptables brief introduction *Netfilter/Iptables (hereinafter referred to as Iptables) is an excellent and open-source completely free firewall tool based on packet filtering in unix/linux. It has very powerful functions and flexible use. It can finely control the data packets flowing into and out of the server. In particular, it ca ...