Programmer Group

Document programming summary III Project Name: configuration file of Linux file I/O modifier Objective: to further exercise the use of linux file I/O programming basic functions: open, read, write, close, lseek; Before the project starts, we will introduce the string STR function under Linux C Function function: find the fi ...

Method 1: replace font Modify web front end VIM of zabbix / www / HTML / zabbix / include / definitions.inc.phpReplace DejaVuSans with simkai in two places define('ZBX_FONT_NAME', 'DejaVuSans'); define('ZBX_GRAPH_FONT_NAME', 'DejaVuSans'); Replace DejaVuSans with simkai define('ZBX_FONT_NAME', 'simkai'); define('ZBX_GRAPH_FONT_NAME', 'simkai ...

Network group is a new technology on centos7. Its function is similar to binding. It is a method of aggregating multiple network cards to achieve redundancy and improve throughput. Different from the binding technology in the old version, network group provides better performance and scalability. It is implemented by kernel drive and team D d ...

Advantages and disadvantages of MySQL-MMM: Advantages: high availability, good scalability, automatic failover, for primary and primary synchronization, only one database write operation is provided at the same time to ensure data consistency. Disadvantages: the Monitor node is a single point, which can be combined with Keepalived to achieve ...

I. download and installation of relevant software #Docker installation wget  -O /etc/yum.repos.d/docker-ce.repo   https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo y ...

Basic concepts of database data The symbolic record that describes things is called Data Including numbers, words, graphics, images, sounds, archives, etc Store in a unified format in the form of "record" surface Organize different records together to form a "table" It is used to store specific data data base A databas ...

I. The Origin of tomcat Name origin: tomcat was originally developed by sun's software architect James Duncan Davidson. Later he helped turn it into an open source project, which Sun contributed to the Apache Software Foundation. Because O'Reilly, the majority of open source projects, will produce a related book and design its cover as a sketc ...

If you need to collect IIS logs in your work, you can use the filebeat component; Log format resolution of iis: Log example: #Software: Microsoft Internet Information Services 7.5 #Version: 1.0 #Date: 2019-03-14 00:00:00 #Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc- ...

Under Linux, the file is deleted by mistake. Use extundelete to restore the test process extundelete download address: https://pkgs.org/download/extundelete Add a disk to the virtual host, which is / dev/sdb [root@localhost bin]# cat /proc/scsi/scsi Attached devices: Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual d ...

DNS domain name system is a service of Internet. As a distributed database which maps domain name and IP address, it can make people access the Internet more easily. DNS uses TCP and UDP port 53   DNS server master-slave replication, subdomain authorizationMain server: 10.120.123.13Slave server: 10.120.123.250Sub server: 10.120.123.251  Master ...