In Linux shell redirection, which symbol is used for input redirection?

In Linux shell redirection, which symbol is used for input redirection?

• A. <<
• B. |
• C. <
• D. 2>

Answer: (C)

The less-than sign is used for input redirection. It tells the shell to take the command’s standard input from a file instead of waiting for you to type input from the keyboard. For example, grep 'pattern' < file.txt runs grep reading from file.txt as if you had typed its contents on the keyboard. Other redirection forms serve different purposes: the pipe symbol connects a command’s output directly to another command’s input, here-documents with << supply a block of text as input, and 2> redirects the standard error stream rather than standard input.

The less-than sign is used for input redirection. It tells the shell to take the command’s standard input from a file instead of waiting for you to type input from the keyboard. For example, grep 'pattern' < file.txt runs grep reading from file.txt as if you had typed its contents on the keyboard.

Other redirection forms serve different purposes: the pipe symbol connects a command’s output directly to another command’s input, here-documents with << supply a block of text as input, and 2> redirects the standard error stream rather than standard input.