Chromebook keyboard shortcutsKeyboard shortcuts are composed of keyboard keys and mouse clicks, allowing you to perform specific actions, such as grabbing a screen or opening a new window.tip : Press Ctrl + Alt + ? to see a list of these shortcuts on the screen.Tabs and Windows
Open a new window
Ctrl + N
Open a new window in Incog
remember a lot of commands, not conducive to popularization, later developed into a graphical interface, through the form of mouse-click interface to operate the computer, the bottom of the actual operation is still a DOS command.1) Drive letter : Enter switch drive letter , such as D: 2) dir enter lists the files and folders in the current directory (dir-->directory)3) CD folder name enter into the specified directory (cd-->change directory)4) C
On the Linux platform, you can use the up and down arrows on the keyboard to call up the SQL commands executed in history at the SQL * PLUS command line prompt of the Oracle database, you can consider using the rlwrap open-source tool.Now, record the installation process (in the Red Hat Enterprise Linux as 5.4 environment ).
① First download rlwrap:Download the composite OS version at: http://rpm.pbone.net/
: This article mainly introduces PHP's anti-marker (', that is, the one under the ESC key on the keyboard, and ~ In the same example) execute external commands. if you are interested in the PHP Tutorial, refer. For example:
Echo 'whoam ';
// Export the database. the folder to be imported must have the write permission, and the content after-u-p must be followed by the write permission.
Echo 'mysqldump-
command, you can also start VI with the-r option.: Recover Recover filesOption settingsTo control different editing functions, VI offers many internal options. Use the: Set command to set options. The basic syntax is:: Set option Settings optionsCommon feature options include the following:Autoindent Set this option, the body is automatically indentedignorecase Set this option, the difference between uppercase and lowercase letters in the rule expression is ignoredNumber sets this option to dis
In Ubuntu, into the VI command of the editing mode, found that by the arrow keys can not move the cursor, will output ABCD, as well as the backspace bar can not delete the characters normally. This is because Ubuntu is preloaded with Vim-tiny, and we need to use Vim-full, the workaround is simple and requires only the following two steps: Step one, enter the following command to uninstall Vim-tiny:sudo apt-get remove vim-common
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Step two, enter the following command to inst
Vi (Vim) keyboard chart and its basic commands
Vi (Vim) keyboard chart and its basic commands:
Go to vi
Vi filename open or create a file and place the cursor at the beginning of the first line
Vi + n filename open the file and place the cursor at the beginning of line n
Vi + filename open the file and place the curso
For example:
Echo ' WhoAmI ';
Export the database, the folder to be imported must have writable permission, the content after-u-p must be written next to each other
Echo ' mysqldump-h localhost-u$dbuser-p$dbpwd--default-character-set=utf8 $DbName >/var/$dumpFileName ';
The above describes the PHP with the anti-apostrophe (', that is, the ESC key on the keyboard, and ~ on the same top) to execute external comm
Move command:Downstream key: Next link on the page (displayed in High Brightness ).Direction key: the previous link on the page (displayed in High Brightness ).Press enter and right arrow key: Jump to the address pointed to by the link.Left arrow key: return to the previous page.
Scroll command:+, Page-down, space, CTRL + F: Page flip.-, Page-up, B, CTRL + B: page up.CTRL + A: move to the front of the current page.CTRL + E: Move to the end of the current page.CTRL + N: Scroll down two rows.CTRL
Home Home Button Main interface keyF2, PAGEUP Menu (soft-left) button left soft keySHIFT-F2, PAGEDOWN Star (soft-right) button right Soft keyESCAPE Back buttonF3 call/dial button dial/Call keyF4 hangup/endcall Button End CallF4 power button Supply keyF5 Search buttonKeypad_plus, Ctrl-f5 Volume up button Increase volume keyKeypad_minus, Ctrl-f6 Volume down button Decrease volume keyCtrl-keypad_5, CTRL-F3 camera buttonkeypad_7, ctrl-f11 switch to previous layout return keyKeypad_9, CTRL-F12 switch
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