20 20 everything free pdf

layer of UNIX operating system, data directly from disk to Oracle transmission, so the use of raw devices for read and write frequent database applications, can greatly improve the performance of the database system. Of course, this is only true if disk I/O is very large and disk I/O is already known as a system bottleneck. If the disk reads and writes are very frequent, so that disk reads and writes become the system bottleneck, then the use of bare devices can significantly improve performanc

The development of foreign visual industry is quite mature, which spawned a lot of online information charting tools, the introduction of a few more useful, using them, five minutes you can make a super-cock infographics: 1 "infogr.am This is an earlier online authoring tool that highlights the support for real-time data refresh, and the production of infographics to support multi-terminal presentation. 2 "Venngage The highlight of this tool is its own ultra-

enter the user name and password" option, click Cancel this option, and save the settings. The Automatic Logon Setting dialog box appears. Enter the user name and password for the automatic logon. 14. Ask a nanny to automatically delete temporary files The Internet Explorer 6 browser can automatically delete temporary files, but you need to make relevant settings. Open the web browser and select "tools/Internet Options ......", Select "advanced", enter the "Security" area, and select "Clear

supports syntax coloring and can be referenced anywhere. Supports compression and automatic switch to control. 11. OpenKeyval: Instant Web-Based Database for Any Project Currently, many websites use databases to store and set content. However, many static websites are hard-coded in HTML pages. For such websites, you also need to store some content. OpenKeyval can provide such a function so that these websites do not need to install databases such as MySQL and MSSQL, and can also store data. It

Document directory Lost World's Fairs Tokiolab Putzengel Yebo Creative Iutopi Emm and Enn Pojeta Florida Flourish Rastapenatal Terredevenements Fill Studio Beautiful Explorer Moods of Norway Toucouleur Worry free labs MindBorn Stefano Ginella Activate Drinks Reverend Danger As an emerging web page creation technology, the effect of Parallax Scrolling has been favored by more and more people. This allows the multi-layer backgroun

[O M engineer _ 01] 20 built-in monitoring tools for Linux systems: top workers often have server performance problems during O M, such: i/O, CPU, memory, network and other bottlenecks, so the system O M, can not sleep? The following tools are helpful for refreshing your mind ~ (@ ^ _ ^ @)~ (1) If top is written in front, here Rocky wants to clarify one point, and the best practices of top are as follows: "Find the process that consumes the most CP

For every system administrator or network administrator, it is very difficult to monitor and debug Linux system performance issues every day. I've had 5 years of experience working with Linux administrators and know how to monitor the system to keep it running properly. To do this, we have written 20 command-line system monitoring tools that are useful and most commonly used by Linux/unix system administrators. These commands can be used under all ver

-----------memory-------------Swap-------io------System-------CPU-----r B swpd free inact active si so bi bo in CS US sy ID WA St 1 0 0 810420 97380 70628 0 0 , 4 , 1 6, 3 03. lsof-Open File ListThe lsof command is available for many Linux/unix systems, and displays open files and processes primarily as a list.Open files mainly include disk files, network sockets, pipelines, devices, and processes. The mai

() function span class= "bu" >print (arr16) arr18 = np.mgrid[0 : 5 , 0 : 5 ] # do padding on two dimensions respectively print (arr18) [-1 1][-1. 3.][-1 0 1 2][[[0 0 0 0 0] [1 1 1 1 1] [2 2 2 2 2] [3 3 3 3 3] [4 4 4 4 4]] [[0 1 2 3 4] [0 1 2 3 4] [0 1 2 3 4] [0 1 2 3 4] [0 1 2 3 4]]]Numpy.ogrid functions= np.ogrid[1:2]print= np.ogrid[0:50:5]print(arr20)[1][array([[0], [1], [2], [3], [4]]), array([[0, 1, 2, 3, 4]])]Numpy.fromstring (String, Dtype=float,

select the "Integrated Options" tab, in the "Interface settings" item you can choose the desktop, Start menu and other places to create WinRAR shortcuts, so it will be more convenient to use. 20. Putting temporary files into other partitions Many software will generate temporary files, by default they will be placed in the C disk of many cluttered folders, a long time, will affect system performance. At the same time, sometimes we want to find some f

The JQuery Lightbox Lightbox plugin allows you to display elegant images, videos and other content for your site and applications (using the modal window). If you are a developer, you must have a collection of jQuery box Plug-ins, as a subset of customers will require their sites to look more attractive and visually appealing. So in this collection, we've compiled 20 of the best jQuery Lightbox plug-in listings, which will help developers create and

process changesPstree Tree Display process dependenciesKill-signal%jobnumber Signal 1, 2, 9, (SIGTERM)KILL-L listing all executable informationKillallNiceReniceFree observation of memory usageUname Inquiry System and core informationUptime Observing System start-up time and workloadNetstat tracking network or slot filesDMESG analysis of core-generated messages at boot timeVmstat Detection System Resource changeThe data displayed:? process field (procs):R: Waiting for the number of processes in

ObjectiveQ: How does Python get a column value in Excel to Parameterize in a script recorded with selenium, such as how to parameterize a login user name and password?A: You can use XLRD to read the contents of Excel for parameterization. Of course, in order to facilitate the detailed understanding of the small partners, the small series to introduce specific methods.First, write the login use case:STEP1: Visit http://www.effevo.com (play an advertising Effevo is Sogou self-developed project man

support browsers that do not yet implement CSS animation properties (like IE9 and previous versions), you need to detect these animated properties and implement a workaround.6. Magic CSS3 AnimationMagic CSS3 Animations is a special effect CSS3 animation library that you can use for free on your Web project. Simple reference to CSS style: Magic.css or Lite magic.min.css.7.bounce.jsBounce.js is a tool used to generate a good CSS3 drive keyframe animati

apt-get install samba#6 install media tools First install VLC-powerful Dongdong sudo apt-get install vlc You also need to install some common codes. sudo apt-get install non-free-codecs libxine1-ffmpeg gxine mencoder libmpcdec3 libquicktime1 flac faac faad sox ffmpeg2theora libmpeg2-4uudeview flac libmpeg3-1 mpeg3-utils mpegdemux liba52-dev mpeg2dec vorbis-tools id3v2 mpg321 mpg123 libflac++6 ffmpeg libmp4v2-0totem-mozilla icedax tagtool easytag

trouble, never wait and have a look at the changes. In many cases, not only is it difficult to solve the problem, but good luck also comes. 　　 10. Some people are used to taking advantage of your petty gain. They have the opportunity to break into the big ones and let them have a blood. Let him also remember: there is no free lunch in the world, and there is no cheap pick to make you earn. 　　 11. It is easy to hide without a Dark Arrow, and the compu

year and had a serious bureaucratic system. I was not very comfortable with being free and casual. Of course, I want to go there to work, but I really don't like to live a life that has been arranged by others. So despite my family's opposition, I refused to look for a job. Later, I learned that the famous saying "Qiao bangzhu" was too appropriate in the current situation. Do not let others' opinions influence your own thoughts and follow your own vo

(1) first, find an hour of free time in your busy life.Turn off the phone, turn off the computer, close the door, and ensure that this hour is not disturbed.This hour only belongs to you, and you need to find the ideal of life. Remember, it may be youThe most important hour in life. Your life may be different when you were a child. If one hour's time currency can only be used for the same thing, it is absolutely worthwhile to find your goal in your li

1, SER-TU elevation (usually using serftp server management tools, first you need to find the ini configuration file under the installation directory, must have the write permission)2. Radmin Privilege Escalation (no stranger to everyone. We also need him to connect after scanning the 4899 empty password)3. Raise the right of pcanywhrer (it is also a remote client software. Download the CIF file in the installation directory to crack it)4. Sam Privilege Escalation (Sam's system account usually n

I suddenly found that ruby is also good, and I want to learn it.IntroductionThis is a short Ruby entry, and it takes only 20 minutes to complete. Here we assume that you have installed Ruby. If you have not installed Ruby, visit the official Ruby website to download and install it.Interactive RubyOpen IRB (Interactive Ruby shell ):If you use Mac OS X, open the terminal window and enter irb;If you are using Linux, Open shell and enter irb;If you are us