how to use f keys on laptop

] ~]# ssh [emailprotected]//number 2nd visit 1th last Login:mon Jul 16:12:37 2018 from 192.168.56 .11//No Password requiredNumber 2nd now transmits the public key to number 1th, so no password is required for number 2nd access 1th, but access number 1th still requires a password.At this point, number 1th needs to create the key, and then transfer the public key to number 2nd can be password-free login number 2nd SCP upload and replication across hostsCurrently only demo number 2ndTransfer

Frequently used shortcut key use collection1. Ctrl+d: Set up copy and paste two operations, if there is a selected part of the copy of the selected section, and after the selection of paste out, if there is no selected part, copy the line of the cursor, and paste it under the line.2.CTRL+ALT+L: Format code (Eclipse ctrl+shift+f)3.alt+enter: Import package, auto fix4.ctrl+n: Quick Open Class (Eclipse ctrl+shift+r)5.ctrl+space: Code Intelligence Tips (

Multiple websites use different SSH keys to log on 1. Create a different SSH key,-t specifies the encryption method, RSA or dsa;-c comment;-f Specifies the file name www.2cto.com ssh-keygen-t dsa-c "Email.xxx"-F ~/.ssh/xxx The above command generates the XXX key pair under ~/.ssh/2. Edit the ~/.ssh/config file, configure the format example: Host github.com www.github.com identityfile ~/.ssh/code_githubhost

This article mainly introducesOracleNon-default creation of Foreign keys is much better than the default creation method of Oracle, which can solve the inconvenience caused by the default creation method of Oracle, I hope the content involved in this article will be helpful to you. For example, the following two tables respectively store the basic information of the employee and the department information of the company. For Create table dept (Deptno

ORM can encapsulate the data stored in the database into objects, and all database operations can be encapsulated in the object if the package is good. Such code can be very clear in the organization structure, and the relative and use of SQL statements in SQL injection will be very slow.There are four kinds of mappings in SQLAlchemy, one to many, the other to the other, the other to many.Implementing this mapping requires only foreign

The main menu changes greatly, while the build and run operations are all done. The changes to shortcut keys naturally increase. Since the interface builder has been built into xcode, the shortcut keys of the corresponding panel are replaced by command + Option + number in the previous command + number, but they are not directly matched. Connect option + command + up in. H and. the experience of switching b

Ctrl+b when a text is selected, the same text appears, highlighted by ctrl+b the same text is all focused so that the same text can be changed at the same timeCtrl+e turning quick edits on or offAlt+u notesctrl+/notesCtrl+\ notesCtrl+d Copy a rowCtrl+shift+d Delete a rowAlt+u notesctrl+/notesCtrl+\ notesCtrl+q exit the entire editorCtrl+w closing the current fileCtrl+e Finding documentsCtrl+k Finding documentsCtrl+g Jump to a line (line number)TAB Auto-CompleteCtrl+x cut a line all cut offCtrl+l

Common shortcut keys for Windows development Method of generating get set for entity class Quick Build Variable Shortcut Windows Development Common shortcut key entity classes generate get Set methodsShortcut key ALT + InsertQuick Build Variable ShortcutCTRL +alt + F global VariablesCtr + ALT + C Global constantsCtr + ALT + V local variablesCtr + ALT + M extraction methodCTR + ALT + P extraction method parametersCTR + I Imp

Every movie needs a director and every rented movie needs to exist in the store. How does we make sure something in another table exists before inserting new data? This lesson would teach us about foreign keys and references.CREATE TABLEdirectors (ID SERIALPRIMARY KEY, nameVARCHAR( -)UNIQUE not NULL);CREATE TABLEMovies (id SERIALPRIMARY KEY, titleVARCHAR( -) not NULL, release_date date, Count_starsINTEGER, director_idINTEGER REFERENCESdirectors (ID))

Article Title: How to Use SSH and SecureCRT keys in Linux (figure ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. I think many of my friends are using SecureCRT as the client software for SSH, but they seldom use its RSA/DS

Article Title: Perfect Use of SSH keys with SecureCRT. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. SSH, especially OpenSSH, is similar to telnet or rsh. The ssh client program can also be used to log on to a remote machine. All that is required is that the remote mac

MySQL supports foreign key storage engine only InnoDB, when creating foreign keys, requires the parent table must have a corresponding index, the child table when creating foreign keys will also automatically create the corresponding index. When you create an index, you can specify the corresponding actions on the child table when the parent table is deleted, updated, including restrict, NO action, SET NULL

Tags: style io using AR for data CTI SP on MySQL supports foreign key storage engine only InnoDB, when creating foreign keys, requires the parent table must have a corresponding index, the child table when creating foreign keys will also automatically create the corresponding index. When you create an index, you can specify the corresponding actions on the child table when the parent table is deleted, updat

Just learned the keyboard in the upper right corner of the three keys (PRTSCRSYSRQ, ScrollLock, Pausebreak) The use of methods, to share with you. Prtscrsysrq (When you think there is a good picture on the screen, quickly press the PRINTSCREENSYSRQ key, this key is the same as the camera shutter (this key on the keyboard are, generally in the direction of the upper part of the key). Then you enter the dra

Edit some files under Linux, which involves the VI editor. Under Linux, the initial use of VI has two typical problems: 1, in the editing mode when using the arrow keys, and will not make the cursor movement, but in the command line appears a, B, C, d four letters; 2, when the editor error, want to delete, found backspace key does not work, can only use the DEL

CycleForWhileUntil for 变量 in 列表； do 循环体 doneE.g for I in ' seq 1 $FILE '; Doecho "Hello, ' head-n $I/etc/passwd | Tail-1 | Cut-d ', '-f1,7 ' "Done Vim Editor: Edit mode input mode last line mode edit-Input: 1. Open file: vim+ #2. close file: ZZ3. Move cursor: H left L right J down K move in Word: W moves to the next word E jumps to the cur

Background in actual projects, the primary key generation mechanism for database tables is designed with multiple options: Sequence, product auto-growth, table auto-growth, UUID, and composite primary key. Considering the simplicity of primary keys and query, we do not recommend that you use a composite primary key. UUID is preferred in terms of data table reconstruction and data migration convenience. Howe

OdiaeresisKeycode 250 = udiaeresis UdiaeresisKey code 251 = ssharp question backslashKeycode 252 = asciicircum degreeKeycode 253 = 3 sterlingKeycode 254 = Mode_switch UseCopy codeThe Code is as follows: Event. The keyCode value is 37, 38, 39, and 40. The cursor of the corresponding pressed direction is left, top, right, bottom."Javascript: if (event. keyCode If (event. keycode = 13) indicates that the press is the Enter key."Javascript: if (event. keyCode> 45 event. keyCode [Ctrl + A select

Ok! On the Android phone, when we use the physical return key, will be a one-time program exit, this is a very bad experience, so we need to use the physical return key component of Rn: Backandroid, the principle isAnalyze the route and then pop () like this!Ok! Let's start with the routing stack! , a bit of computer technology based on the students should learn the stack, which is the stack is the back int

only to editors. Enter the line number and you can quickly jump to the nth row in the source file,Ctrl + Q: Previous edit position: Displays the location of the previous edit operation, returning to the nearest modified location. Even if you look at different files, you can use this shortcut to find the location of your most recent changes to the file. Especially when the file is larger, it is more useful.Ctrl + T: Quick type hierarchy: Opens the Lig