Programming VIP

1. Background Log collection adopts ELK framework, i.e. elasticsearch, logstash, kibana, and filebeat component. Filebeat is used to scan log files and send logs to logstash service, while logstash service completes log segmentation and sends logs to elasticsearch service. 2. Deployment steps of filebeat (log - > logstash) Download the ...

Introduction to vnc server vnc server is a service opened on the server in order to satisfy the distributed users to share the resources on the server. The corresponding client software is vnc viewer. vnc server can also be different operating systems, such as using windows to access linux system resources remotely. VNC connecting Linux 1. Do ...

Firewall D is the front-end controller of iptables, which is used to implement persistent network traffic rules. It provides command line and graphical interfaces, which are available in the repositories of most Linux distributions. There are two main differences between using firewall D and controlling iptables directly: Firewall D uses zone ...

In the Oracle database, the optimizer needs to rely on the collection of statistical information of related objects in order to generate the optimal execution plan. The database can automatically collect the execution plan or use the package DBMS_STATS is collected manually. This article does not explain the collection of general statistics. It ...

Problem scenarios We use Suricata for traffic analysis. Suricata is deployed on a 48-core physical machine with a multi-network card. Due to business needs, suricata's network card for monitoring traffic has been upgraded from 5 to 6, enp176s0f1 has been added, and several similar errors have been found in suricata's log: <Error> - [ERRC ...

Under the linux system, the disk is replaced, but for the HP array card, the common MegaCli, storcli and percli can not get the disk information. At this time, the special tool ssacli is needed.rpm package download address: https://downloads.linux.hpe.com/SDR/repo/mcp/centos/7/x86_64/current/ View raid card information (including controller st ...

last command Function Description: display the list of recently logged in users The last command will read the wtmp file under / var/log / and display the user name of the login system recorded in the file. Usage: last option effect -n Set the number of lines to display the list -R Do not display the host name and IP address of the l ...

Chapter 0 of MySql, installation and cluster configuration 1, MySql installation 1. RPM installation RPM installation, unable to customize some installation paths and configuration file paths ##Fill in the pit later 2. Generic installation Binary precompiled Generic, download address: https://cdn.mysql.com/archives/mysql-5.7/mysql- ...

useradd command Function Description: add user or update default new user information Usage: useradd [options] login_name option explain -u，--uid UID When adding a new user, specify the UID number manually. The default is the UID+1 of the previous user, the UID usage range (CentOS6) 500 +, (CentOS7) 1000+ -g，--gid group_name When a ...

Today, my colleague said that a new cloud server is installed, and it is normal to log in Using ssh, but the above service port of Dayun database cannot be accessed. Using netstat ANP to view the port is normal to listen, and the listening address is also allowed to be accessed by any ip And the firewall and iptables are both closed I was also ...