Bash Common shortcut key Basics (i)

shortcut Keys function

CTRL + A moves the cursor to the beginning of the command line. If the command we entered is too long, we want to move the cursor to the beginning of the command line using the

Ctrl+e Move the cursor to the end of the command line

CTRL + C forces the current command to terminate

Ctrl+l Clear screen, equivalent to clear command

Ctrl+u the command before the cursor is deleted or clipped. I entered a long line of command, do not use the BACKSPACE key one character deletion, using this shortcut will be more convenient

Ctrl+k Delete or cut the contents after the cursor

Ctrl+y paste ctrl+u or ctrl+k -cut content

Ctrl+r Search in the history command , after pressing Ctrl+r , the search interface will appear, as long as the search content entered, will be searched from the historical command.

Ctrl+d exit the current terminal.

CTRL + Z pauses and puts in the background. This shortcut is involved in the management of the work, we are detailed in the System Administration section.

Ctrl+s Pause the screen output.

Ctrl+q reply screen Output

10.3.3 input/output redirection

1. Standard input and output

   device    device file name    file descriptor   

keypad /dev/stdin 0 standard input

display /dev/sdtout 1 standard output

display /dev/sdterr 2 standard error Output

2. Output redirection

symbol

TD style= "padding:0px 7px;border-width:1px;border-style:solid solid solid none;" height= "valign=" Top "width=" 104 ">    

	action
	command > file	< Span style= "font-family: ' The song Body '; > Output the correct output of the command to the specified file or device in a covered manner.
	command >> file	< Span style= "font-family: ' The song Body '; > In addition, the correct output of the command is output to the specified file or device.
	&NBSP; 2> file	The way that has been covered, Outputs the error output of the command to the specified file or device.
	Error Command 2>> file	Output the error output of the command to the specified file or device in an additional way.

                    &NBSP

& nbsp correct output and error output save   at the same time;	< P style= "margin:0px;padding:0px;" > command > file &NBSP; 2>&1
	command >> file &NBSP; 2>&1
	command Span class= "Apple-converted-space" >&NBSP; &> file
	command Span class= "Apple-converted-space" >&NBSP; &>> file	in an additional way, The correct output and error output are all companions to the same file.
	commands >> files 1 2>> file 2	append the correct output to the file 1 and append the error output to file 2 .

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Bash Common shortcut key Basics (i)