Linux

Eight weeks two sessions (January 30)10.28 Rsync Tools Introduction10.29/10.30 rsync Common Options10.31 rsync sync via sshI. Introduction of RSYNC ToolsLinux system has a lot of data backup tools, commonly used is rsync, from the literal meaning of

Data reading and writing are dividedTCP Data read/write, UDP data read/write, general data Read/write1.TCP Data read/writeDefinition: Socket is the connection between user space and kernel space, TCP and UDP are the first layer of the

1. First we go to Linux remotelyThe 2.SSH configuration file is in the/etc/ssh/sshd_config file.3. We modify the port by editing this file to achieveVi/etc/ssh/sshd_config4. Find the #port 22 line, default port 22We can remove the previous # and

One, Linux system logDoes the log matter? Yes, no logs. How do we know the status of the system? No logs how to troubleshoot a trouble? The log records a variety of things that happen every day in your system, and you can check the cause of the

Summary There is no special service running on the host, so no monitoring alarm is added. This sudden execution of a command cannot be realized because the disk is slow. The error was found because the directory was

1 Build the DNS master-slave server.1.1 Environmental Requirements:Centos 6.5 x86_641.2 Hardware configuration:NameIP planningCpuMemoryHard diskPrimary server192.168.0.244 cores8G80GFrom the server192.168.0.344 cores8G80G1.3 Package

Linux first week study notes (+)2.11.CP CommandCP ( Copy shorthand) Command: used to copy one or more source files or directories to a specified destination file or directory. Cp–r : Copy Directory- I. : Security Options-----------------------------

Chapter II IP Protocol detailedIP protocol is the core protocol in the family of TCP/IP protocol and one of the foundation of socket network programming. The IP protocol is characterized by the provision of stateless, non-connected, unreliable

* * Everyone good, a long time did not update the blog, is a bit busy recently, after the blog may update the time is not unified, please everyone more magnanimous, the next start today's content. 1. First, the basic permissions Ugo:Summary: File

10.28 Rsync Tools Introduction The rsync command is a remote data synchronization tool that allows you to quickly sync files between multiple hosts via Lan/wan. Rsync uses the so-called rsync algorithm to synchronize files between local and

** 简述** linux是一套自由加开放源代码的类Unix操作系统，诞生于1991年10月5日（第一次正式向外公布），由芬兰学生linus Torvalds和后来陆续加入的众多爱好者共同开发完成的。 linux是一个基于POSIX和Unix多用户、多任务、支持多线程和多CPU的操作系统。它能运行主要的Unix工具软件，应用程序和网络协议，可以支持32位和64位硬件，Linux继承了Unix以网络为核心的设计思想，是一个性能稳定的多用户网路操作系统。

One, Linux network related 1. Ifconfig Viewing network card IPThe Ifconfig command is used to configure and display network parameters for network interfaces in the Linux kernel. The NIC information configured with the Ifconfig command does not

CentOS7, the system comes with the NetFilter operation program from Iptables to Firewalld.I. 9 zone in FIREWALLDThere are 9 zones in the FIREWALLD, each zone is described belowDropAny incoming network packets is dropped; There is no reply. Only

Specific Linux commands:1.who: Displays information about users logged into the system; Tty7 graphical interface; user logon time2.PWD: the current path; 1./: The location representing the start of the file system2. Path: A string representing a

Crontabcrontab -l01 */2 * * * /usr/sbin/logrotate -v /opt/shell_app/appengine >/tmp/logrotate.log 2>&1Logrotate$ cat /opt/shell_app/appengine compressdailysize 10Mmissingokrotate 7/ebs_data/opt/typhoonae/var/log/http*.log{ rotate 1 prerotate

Linux Nginx+keepalived负载+高可用SummaryNginx+keepalived to the enterprise to achieve low-cost, high-reliability high-availability soft load balancing, up to the high concurrency of the million.BodyPreparation for the first stage1.1 Project topology

For a detailed description of the du command parameters see: http://baike.baidu.com/view/43913.htmThe following is only a brief introduction to it;View the size of the Linux file directory and the number of files that the folder containsTotal

Logstash grok built-in Regular Expressions and logstashgrok built-in Reference: https://github.com/elastic/logstash/blob/v1.4.2/patterns/grok-patterns USERNAME [a-zA-Z0-9._-]+USER %{USERNAME}INT (?:[+-]?(?:[0-9]+))BASE10NUM (?[+-]?(?:(?:[0-9]+(?:\.[0

How to use a USB boot disk to install ubuntu and usbubuntuUSB boot disk installation ubuntu system I installed a Ubuntu-16.04.3-desktop, the following simple process records: In windows, burn ubuntu 16.04 iso to USB to create a boot disk. See:

Linux Command configuration scp + crontab + mail, scpcrontab Remote replication:Example: log on to server A and copy all the files under/sh of server A to the/sh folder of server 172.18.100.200. Scp/sh/* root@172.18.100.200:/sh # Need to know the