Red Hat RHCSA 8 Cert Guide: EX200

Appendix C. Memory Tables Answer Key

Chapter 2

Table 2-2 Standard Input, Output, and Error Overview

Name	Default Destination	Use in Redirection	File Descriptor Number
STDIN	Computer keyboard	< (same as 0<)	0
STDOUT	Computer monitor	> (same as 1>)	1
STDERR	Computer monitor	2>	2

Table 2-3 Common Bash Redirectors

Redirector	Explanation
> (same as 1>)	Redirects STDOUT. If redirection is to a file, the current contents of that file are overwritten.
>> (same as 1>>)	Redirects STDOUT. If output is written to a file, the output is appended to that file.
2>	Redirects STDERR.
2>&1	Redirects STDERR to the same destination as STDOUT. Notice that this has to be used in combination with normal output redirection, as in ls whuhiu ...