Korn Shell: Unix and Linux Programming Manual, Third Edition, The

Redirecting Input/Output

The Korn shell provides a number of operators that can be used to manipulate command input/output, files, and co-processes.

I/O Redirection Operators

<file	redirect standard input from file
>file	redirect standard output to file. Create file if non-existent, else overwrite.
>>file	append standard output to file. Create file if non-existent.
>|file	redirect standard output to file. Create file if non-existent, else overwrite even if noclobber is set.
<>file	open file for reading & writing as standard input
<&–	close standard input
>&–	close standard output
<&n	redirect standard input from file descriptor n
>&n	redirect standard output to file descriptor n
n<file	redirect file descriptor n from file
n>file	redirect file ...