novo key

The teacher assigned each of us an Ubuntu virtual machine, said to do the experiment. I certainly do not mind, my favorite is Ubuntu, but for some of the unfamiliar to Linux students, may be a very difficult experimental process.The teacher wants us to edit some files under Ubuntu, which involves the VI editor. In Ubuntu, the initial use of the VI is a problem, that is, when using the arrow keys in edit mode, does not make the cursor move, but in the command line appears [A [B] [C [d] letters, a

First, the editor/etc/vim/vimrc.tinySince the owner of the/etc/vim/vimrc.tiny is the root user, the file must be modified under root privileges. Very simply, the penultimate sentence in this file is "set compatible", as follows:Changing the "compatible" to "nocompatible" non-compatible mode solves the problem of the direction key becoming ABCD. The next problem to solve the backspace key is also very simple

ObjectiveRequires developers to use OpenSSL locally to generate private and public keysBecause the Mac comes with the OpenSSL tool, you don't have to download the OpenSSL tool like WindowsStep 1. Create a folder where the terminal enters the folderCd/users/tanqihong/desktop/rsa2. Terminal input OpenSSL open tool 3. Generate RSA private keyGenrsa-out RSA_PRIVATE_KEY.PEM 1024The command generates a 1024-bit private key, which generates a successful inte

The code is as follows Copy Code function response (obj) {var $list = $ (obj);var $children = $list. Children ();var num= $children. Size ();//$list Total numbervar current=0; The current selectionAddnow ()$ (document). Bind (' KeyDown ', function (e) {if ($list. Is (": visible")) {if (E.keycode = = 40) {//Downif (currentAddnow ()E.preventdefault ();}else if (E.keycode ==38) {//Upif (current > 0) current= current-1;Addnow ()E.preventdefault ();}else if (E.keycode = = 13) {The va

Recently because to play tensorflow, so the dusty ubantu to open, but configure the network time, is a mess, appeared in the insert mode, the input direction key can not move the cursor but become garbled; backspace key can not delete characters, can only move the problem of the cursor. Really be engaged in the "burn". Later found a good article finally solved the problem, here record, right when it is a no

The last one we said about self-draining if the primary key is 0, here I figure out why, cause this is because the initial value is set in SQL for the self-row:　　From here you can see that the two variables, one is the increment of the initial value, one is incremental, here is 1, so when the setting of self-increment will be that field of the original existence of all 0 to the beginning of the 1 step 1 of the arithmetic progression.　　However, this va

Label:Sequence + trigger for Oracle PRIMARY KEY auto-incrementThe syntax format for a sequence is: CREATE SEQUENCE sequence name [INCREMENT by n] [START with n] [{maxvalue/minvalue n| Nomaxvalue}] [{cycle| Nocycle}] [{CACHE n| NOCACHE}]; INCREMENT by Used to define the step of the sequence, if omitted, the default is 1, and if a negative value is present, the values of the sequence are decremented by this step. START with De

http://www.btcside.com/new/detail/2145 This is the three words that often appear in Bitcoin, so what do they mean by each other? What kind of relationship do they have? Let's talk about a private key, such as a string 5KYZDUEO39Z3FPRTUX2QBBWGNNP5ZTD7YYR2SC1J299SBCNWJSS, which is a private key. Any application that correctly supports the Bitcoin protocol can recognize the string as a private

Label:First, what is the primary key, foreign key: There are several attributes in a record in a relational database, which can be a primary key if one of the attribute groups (note is a group) uniquely identifies a record: Student Table (School number, name, gender, Class) Each student's school number is unique, the study number is a primary

This article is referenced from:http://blog.csdn.net/bingqingsuimeng/article/details/51595560First, what is the primary key, foreign key:There are several attributes in a record in a relational database, which can be a primary key if one of the attribute groups (note is a group) uniquely identifies a record.Like whatStudent Table (School number, name, gender, Class)Each student's school number is unique, th

Tags: primary key first break range Ror add comment art DropSQL PRIMARY KEY ConstraintThe PRIMARY KEY constraint uniquely identifies each record in a database table. The primary key must contain a unique value. Primary key columns cannot contain NULL values. Each table shoul

1. HTTPS Handshake protocol: http://blog.csdn.net/clh604/article/details/221799072, the concept of the certificate: http://blog.csdn.net/sealyao/article/details/5761747A digital certificate is a digital file formed after a certificate authority (CA) authenticates the certificate requester, using the CA's root certificate to sign some basic information of the applicant and the applicant's public key, which is equivalent to the official seal of the issu

Which method does JavaScript obtain the keyboard's direction key? javascript direction key This article describes how to use JavaScript to obtain the direction key of the keyboard. Share it with you for your reference. The details are as follows: Create an event. keyCode object, which can effectively obtain the direction keys on the keyboard. After running the

Common array functions in php (4) (whether the array contains a key name or index), array key name /*********** Array_key_exists (check whether the key name or index is in the array) * ***************/$ arr1 = array ('name' => 'sheldon ', 'age' => 30, 'address' => 'carlifornia '); if (array_key_exists ('name', $ arr1) {echo 'the name element is in the array. ';}

Common array functions in php (5) (obtain the set of key names in the array) and array key namesArray_keys ($ arr, $ search_value, $ strict ); -- Obtains the set of key names in the array. // The array to be retrieved in parameter 1; the default value of the key to be retrieved in parameter 2 is NULL; and the default

The blocking key can override the two methods of activiy. Blocked return key Public boolean onKeyDown (int keyCode, KeyEvent event ){ Switch (keyCode ){Case KeyEvent. KEYCODE_BACK:Return true;}Return super. onKeyDown (keyCode, event );} The shielded home key and other keys are different. Public void onAttachedToWindow (){This. getWindow (). setType (WindowManage

In jsp, how does one automatically submit the form by pressing the Enter key? In jsp, the Return key submits the form In order to save trouble, you often want to press the Enter key to submit the form. to control these actions, you can use JS to meet the requirements. The Code is as follows: Solution: Put the form in a div, and then listen to the div event $ ("

Perform full recovery: the key data file of the SYSTEM is lost in ARCHIVELOG mode. If a data file is lost or damaged and the file belongs to the SYSTEM or UNDO tablespace, perform the following steps: 1. the instance may or may not be automatically closed. 2. If the instance is not automatically closed, use SHUTDOWNABORT to close the instance. 3. Load the database Perform full recovery: the key data file of

: This article mainly introduces the classification based on the same key value of a key name. if you are interested in the PHP Tutorial, refer to it. Array ([0] => Array ([shi] => municipal jurisdiction [qu] => Cao Zhong [url] => s120100) [1] => Array ([shi] => municipal jurisdiction [qu] => Yangcun [url] => s120100) [2] => Array ([shi] => counties [qu] => Jixian [url] => s120200) [3] => Array ([shi] => mu

Clicking the back key of the device is equivalent to notifying the Android system "I have finished using the activity and I don't need it now." "After receiving the instruction, the system immediately destroys the activity. That is, call OnPause ()->onstop ()->ondestroy () Click on the Home key, equivalent to notify Android "I'll take a look elsewhere and maybe come back later." "At this point, for a qui