Command Input and Output Redirection Operators

Operation	Bash Shell   Redirection Syntax
Read standard input from a file.	command
Read standard input until end of marker.	command <
Write standard output to a file.	command >file
Append standard output to end of file.	command >>file
Write standard output and standard error to separate files.	command >file 2>file2
Write standard output and standard error to the same file.	command >file 2>&1
Write standard output and standard error to the same file.	command &> file
Append standard output and standard error to the end of a file.	command >>file 2>&1
Send (pipe) standard output of first command to input of second command.	command | command2
Send (pipe) standard output and standard error to input of second command.	command 2>&1 | command2