orchestration lessons

action (U)10, replace all the etc in the entire file with a CTE (1, $s/etc/cte/g)11, move the cursor to line 25th, delete the string "ly" (25G then press J to move the cursor to the right to find "lyl", press V to select, then press x)12, Restore previous action (U)13, delete line 50th (50G DD)14, Restore previous action (U)15. Delete all contents of 第37-42 (37G 6DD)16, restore previous action (U)17, copy the contents of line 48th and paste it below line 52nd (48G yy 52G p)18, restore previous

Tags: LinuxEight weeks three sessions (March 28)10.32/10.33 rsync via service sync10.34 Linux system logs10.35 Screen ToolExtended Linux log File Explorer Logrotate http://linux.cn/article-4126-1.html Xargs Usage Detailed http://blog.csdn.net/zhangfn2011/article/details/6776925 10.32rsync synchronization via service (UP)Open two virtual machines, a machine 192.168.133.130,b machine 192.168.133.130, two machines can communicate with each other.A machine file is synced to machine

/wtmpUsed to view the correct login history, he is a binary file that cannot be viewed by cat and can only be viewed with last.LASTB command to view the user who failed the login, the corresponding file is/var/log/btmp/var/log/secureHe is the log that logs the login failure. He is also a binary file and cannot be viewed by cat./var/log/secure Security LogHe logs log-in related, Pam-related, and so on. If someone has hacked our device, it will also be recorded in this file.Screen toolVirtual Term

315.1 FTP Introduction15.2 using VSFTPD to build FTP service (top)Install the VSFTPD software package, the command is as follows;Create a virtual user with the following command:Edit the file virtual user's password file.Write content, odd behavior user command, even behavior password.Need security, not everyone can read, set permissions, command as follows:Go to DirectoryTo the first user, create the first configuration file. The configuration file and user name are the same.Copy the following

PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMANDroot 1 0.0 0.6 128164 6824 ? Ss 5月06 0:02 /usr/lib/systemd/systemd --switched-root --system --deserialize 21root 2 0.0 0.0 0 0 ? S 5月06 0:00 [kthreadd]root 3 0.0 0.0 0 0 ? S 5月06 0:00 [ksoftirqd/0]....... How to see if a process is running, as in the following example:[[Email protected] ~]# PS aux | grep nginxRoot 44476 0.0 0.0 112676 984 pts

. The disadvantage is that the name of the process is not displayed.Linux under Grab BagGrab Bag Tool tcpdumpSee which packages are coming in. And the flow of data, length. The default is TCP packets, if you find a lot of UDP packets are likely to attack. Eg DDos UDP flood. Access to professional anti-attack devices or services only.TCPDUMP-NN NIC Name-nn the first n means that the IP is displayed as a number without displaying the hostname.Time source IP and port > Destination IP and port: Pack

This article is mainly to talk about Jenkins, but Jenkins, I have no way to not put it with continuous integration (continuous integration, referred to as CI) together, so I first to talk about what is continuous integration and why need continuous

The ultimate goal of SDN networks is to serve diversified business application innovations. Therefore, with the deployment and promotion of SDN technology, more and more business applications will be developed. Such applications will be able to

A mixed string is a string consisting of Chinese characters, English letters, various punctuation marks, and escape characters. We often choose to use CANVAS instead of advanced interfaces such as FORM, because we need to control the UI style by

I have been learning JavaScript over the past few days and I feel that I often need to use the HTML language. So I have learned a little about it. Here I will make a record for your reference.   1. Organize text 1.1 page title the tag is

Arch: kernel source code that contains a specific architecture Include: contains most of the files required to compile the kernel source code. Init: initialization of the contained Kernel Code(You can start to understand how the kernel works) MM:

After learning about the advantages of the open-source RDBMS Relational Database Management System, you have installed the MySQL database to provide registration, subscription, and e-commerce services for Web applications. Database reliability alone

This is a created article in which the information may have evolved or changed. This Morning + Noon toss fast 3-hour routing module Crazy failure, how to change are 404, in the near despair, group master help find out the problem: Import Guide

What are the 40 common mistakes of PHP programmers ?, Bad habits of programmers. What are the 40 common mistakes of PHP programmers ?, Bad habits for programmers 1. do not write comments 2. do not use IDE tools that can improve production efficiency

Old article Looking at the development of the global virus, it is not difficult to find that the worm virus has made the anti-virus market a hit. Worms are easy to handle, such as kurniova, Sircam, red code, blue code, and bin Laden. They are more

The Tutorial at (www.bkjia.com) hopes that you will develop good naming rules when designing programs, even if you are doing a Demo, otherwise the error may make you creazy! Which of the following is my reference material! An extremely simple

C. Greg and Arraytime limit per test 2 secondsMemory limit per test 256 megabytesInput Standard inputOutput Standard output Greg has an arrayASignature = SignatureA1, bytes,A2, middle..., middle ,...,ANAndMOperations.Each operation looks:LI,RI,DI, (1

Chapter I and Chapter II Basic OC syntax IPhone development tutorial Chapter 1 Basic OC syntax iPhone development overview-required (1.1)Http://www.apkbus.com/android-102215-1-1.htmlChapter 2 installation and introduction of development tools for

Do not ignore any words that the customer has said-if it is through email communication, you should carefully analyze each sentence when receiving the customer's email, and think deeply about the customer's thoughts behind the request, only by

This article is translated from a gigaom article. The original post address is Jonathan boutelle, one of the CTO and founders of the famous site slideshare. Cloud computing is a powerful tool for startups, because they can have almost unlimited