I/O Redirection, Input Redirection Output Redirection Error Redirection

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MCA 3rd SEMESTER ( Lateral Entry )
LINUX
INPUT OUTPUT REDIRECTION
SUBMITTED TO : -
Mr. Adithya V.
SUBMITTED BY : -
Tanishq Soni

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Introduction
Input – Output Redirection
 Redirection is a feature in Linux such that when executing a command, you can change the
standard input/output devices.
 The basic workflow of any Linux command is that it takes an input and give an output.
 The standard input (stdin) device is the keyboard. The standard output (stdout) device is the screen.

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Linux treats the keyboard as the standard input (value 0) and terminal screen standard output
(value 1) as well as standard error(value2).
 Redirection inputs:
The < symbol is used to redirect inputs. Example
$cat < file.txt
File.txt takes input command cat. Redirecting
 Redirection outptuts:
The > symbol is used to redirect outputs.
$ ls >list.doc

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Redirecting errormessages:
The ‘2>’ symbol is used to redirect error messages.
Example :
$cat 2> list1.doc
If there is no file named list1.doc in the current directory then the error messages is
sent to the standard error device.

5. THANK YOU
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