. The two-channel, also known as stereo, has two lines in the hardware, with better sound quality and timbre than mono, but the amount of storage space occupied by digitizing is one-fold more than mono.Second, sound card driverFor security reasons, applications under Linux cannot operate directly on a hardware device such as a sound card, but must pass through a kernel-supplied driver to complete it. The essence of audio programming on Linux is to use a driver to complete various operations on t
Safe conversion
In the ADMT tools console, right-click the Ad Migration Tool and select the Security Conversion Wizard.
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Click Next650) this.width=650; "src=" Http://s3.51cto.com/oss/201711/12/d4c1c221daa868712bb712ed6a530866.png "/>
Select the previously migrated object and click Next65
The hardware needs to be configured, including CPU, memory, NIC, disk, mirror, etc. These in the previous study we can automatically create through the script. After configuring the hardware, start the installation, there are many options we need to manually select, so we can also create automatic answer script. This allows us to implement a virtual machine configuration installation via an instruction that is fully automated and unattended.1. Build a good yum source;2. Install kickstart;650) th
1.Displays the current time, the display mode isHh:mm:ss, and save to fileTime.txtfile. 650) this.width=650; "title=" screenshot from 2017-10-20 14-03-40.png "src=" https://s1.51cto.com/oss/201710/24/ B6db83ecaffee4983fcafeabbf40c60f.png-wh_500x0-wm_3-wmp_4-s_2457909381.png "alt=" B6db83ecaffee4983fcafeabbf40c60f.png-wh_ "/>2.Show/etc/passwdthe document15-18line content. 650) this.width=650; "title=" screenshot from 2017-10-20 14-07-14.png "src=" http
Next to "Springmvc start analysis"Go on......As a servlet, the request starts with Doget and DopostDispatcherservlet's doget and Dopost are inherited from Frameworkservlet.650) this.width=650; "src=" Https://s2.51cto.com/oss/201711/02/d5d02a4bc23561b1709ffff92415f99b.png "title=" 2017-11-02_104849.png "alt=" D5d02a4bc23561b1709ffff92415f99b.png "/>ProcessRequest () is primarily called the Doservice () method, which is specifically implemented in Dispa
Porting ALSA audio library
Category: Linux Embedded driver development ()
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Playbackaudio embedded test linuxtimer
Andrew Huang
Bluedrum@163.comALSA is a late audio processing library in Linux, which is mainly used to improve the original OSS library. better performance, supporting multiple playback sources, etc. but correspondingly, the programming complexity is increased. the old
1, JSP built-in objects:-a reference that can be used directly in a JSP's Java code block, an expression block, and so on, called a built-in object of a JSP. There are 9 commonly used built-in objects, namely:650) this.width=650; "src=" Https://s4.51cto.com/oss/201710/20/32cacd3b3bfe2a3b3235e49f6ee2ad93.png "title=" 00.png "alt=" 32cacd3b3bfe2a3b3235e49f6ee2ad93.png "/>-These nine objects can be used directly in the JSP's Java code block, expression b
Tags: shellBasic common commands for shellsecho commandFunction: Displays a segment of characters on the display, outputs the specified string, or displays the value of the variable.Example: Echo Hello650) this.width=650; "src=" Https://s4.51cto.com/oss/201711/12/45c5d0e8e6d3af589c46f355d57f451f.png "style=" float: none; "title=" Image 1.png "alt=" 45c5d0e8e6d3af589c46f355d57f451f.png "/>uname commandfunction: Displays information about the current sy
1, complete lamp basic realization http://guanm.blog.51cto.com/13126952/1974839Administrator who needs to manage the blog database, previously created the test user permissions are not enough, give the test user plus permissionsGrant all on * * to ' test ' @ ' 192.168.191.% ';SYSTEMCT Restart MARIADB2. Implement database phpMyAdminwhen mariadb,php,httpd on a host, can be achieved, if only to build a personal blog, this step can not do, create a database, etc., on the Linux implementation can. (
can let ordinary users temporarily to execute a command, specify user execution (use: Do not need to give ordinary user administrator rights, you can specify the normal user to have partial command rights)Cases:Enter the command Visudo, edit the file under the root user to add the normal user needs to operate the root user rights, all represents all.650) this.width=650; "Src=" Https://s3.51cto.com/oss/201711/01/bdc9fe18a4afe273e0a20283da67e716.png-wh
Tags: 13One, the SU commandSU Switch User-+ user name switch User (root switch no password for normal user.) Otherwise, a password is required)Plus-is the switch to the directory of the home directory, switching thoroughly. Do not add is to switch to/root under the user650) this.width=650; "Src=" Https://s5.51cto.com/oss/201710/28/31ad177b6fc24fdf8ad0c889ad17dfbd.png-wh_500x0-wm_3 -wmp_4-s_3062104408.png "title=" 1.png "alt=" 31ad177b6fc24fdf8ad0c889a
close the remote interface is not a normal exit).The root user's command is guaranteed to exist:/root/.bash_historyNormal user's command is persisted:/home/user name/.bash_historyYou can view history commands through Cat/root/.bash_history, or you can view historical commands with the history command. It is important to note, however, that history's view of historical commands may be different from the historical commands that cat/root/.bash_history view, because the command stored in the histo
Linux + Nginx + Asp.net Core and daemon deployment, nginxcore
The previous article Docker basics and examples describes Docker deployment and related. net core packaging examples. In this article, I will use oss. offical. the site is used as an example to describe the complete deployment process on linux machines ,. net core running in docker containers has been introduced, here.. net core running environment I will introduce the scenarios that run di
Sina LoginDetermine whether the Sina account on this site exists. If the account does not exist, generate the account. If the account exists, go to step 3.// Process user data on this site$ C = new weiboclient (wb_akey, wb_skey, $ _ session ['last _ key'] ['oss _ token'], $ _ session ['last _ key'] ['oss _ token_secret ']);
$ Xuser = $ C-> show_user ($ _ session ['last _ key'] ['user _ id']);// Convert st
. Net Standard extension supports instance sharing,. netstandard
Part 1 (. net infrastructure and cross-framework development. net in the Current ecosystem, I also shared the simple implementation process. This article explains my OSS. common Project extension. net Standard supports the following processes: solution selection, porting detection, porting process, solutions to common problems, and nuget packaging and deployment.
Before getting started,
Tags: Linux two connected to each otherInterconnection between two Linux machinescommands to connect and view W650) this.width=650; "Src=" Https://s1.51cto.com/oss/201710/20/4ef831a69356da80cb3f4d2b8c99b441.png-wh_500x0-wm_3 -wmp_4-s_1170928847.png "title=" Image.png "alt=" 4ef831a69356da80cb3f4d2b8c99b441.png-wh_ "/>Description of both terminals in connection 192.168.133.1 is Windows 129 is Alex2 in connection650) this.width=650; "Src=" Https://s1.51
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