linux introduction book

}vrrp_instance VI_1 { state BACKUP //定义backup interface ens33 //定义网卡 virtual_router_id 51 //和master一样的id priority 90 //定义优先级，要比master的小，越小越不优先 advert_int 1 authentication { auth_type PASS auth_pass testlinux123 } virtual_ipaddress { 192.168.188.188 } track_script {

I. Introduction of Linux Monitoring platformThese software are required for PHP environment support, using Apache PHP or Nginx php can, Nagios do not need to use MYSQL,CACTI and Zabbix is required to use MySQLSecond, Zabbix monitoring introductionZabbix Monitoring FlowchartThird, installation ZabbixNeed to prepare two machines, one as Zabbix-server server, one as Zabbix-agent client[Email protected] ~]# wge

Linux AB command usage introduction, linuxab command Introduction 1. Tools for stress testing: AB 2. Performance monitoring tool: nmon Check the ulimit-n data on the linux host. The number of records that have not been changed is 1024. You 'd better change the value to a larger value. This is the maximum number of thre

edit the boot setting system file, and load Linux through ext2 or ext3 file system. Kernel (Grub can identify almost all Linux supported file systems with different file system drivers, so many file systems can be used to format the sector of the kernel file, not limited to the Ext file system).The logo and mascot of Linux is a penguin named Tux, the origin of w

Brief Introduction to linux ls commands, and introduction to linuxls I am familiar with linux, but I am not familiar with ls commands. Because we usually use this command to view files in a directory The command format is: Ls [Option] directory or file This article describes the two most common options: -L: Used to l

Linux Task Scheduler Cron[Email protected] ~]# CRONTAB-ENo crontab for root-using an empty oneThis is done 3 o'clock in the morning every day.0 3 * * */usr/bin/touch/root/123.txt >/dev/nullStart the service[Email protected] ~]# systemctl start CrondBasic format:* * * * * commandTime-sharing Weekly commandThe 1th column represents minutes 1~59 per minute with * or */1The 2nd column represents the hour 1~23 (0 means 0 points)The 3rd column represents th

Linux Task Scheduler CronLinux Task Scheduler: Automatically executes commands or scripts at a certain time.Configuration file for Task Schedulercat /etc/crontabThe first two lines are defined variables, the third line is to send the message to whom, and then the last line has five * (asterisks) corresponding to five bits, that is, the above five elements, the following to explain what the difference means:1. Indicates minutes (0-59)2. Indicates hours

Linux Introduction First, Linux preliminary introduction Advantages of Linux Free, open-source Multi-threading, multi-user support Good security Superior in memory and file management System stability Consume less resources

First, Linux preliminary introduction Advantages of Linux Free, open-source Multi-threading, multi-user support Good security Superior in memory and file management System stability Consume less resources Disadvantages of Linux Relatively difficu

mechanism for Linux that can use rules to allow or disallow some access. Its rules are stored in the/etc/sysconfig/ipchains file, if you want it to not take effect temporarily, then you can run/etc/rc.d/init.d/ipchains stop, then all the rules are canceled, all network access will be allowed. You can run/etc/rc.d/init.d/ipchains status to learn about the current restrictions on network access. About this knowledge, this article is limited to the leng

Different operating systems need to use different types of file systems, in order to be compatible with other operating systems to exchange data, usually the operating system can support multiple types of file systems, such as Windows Server, the system default or recommended file system is NTFS, However, it also supports FAT32 or FAT16 file systems, and DOS and Windows 9x generally use FAT16 or FAT32 and do not support the NTFS file system. The Linux