CS208 Introduction to Computer Systems
Wednesday, 1 November 2023

+ Questions
- Buffer overflow or otherwise

+ >, <, |
 >
    "takes the output of the command on the left and puts
     it in the file on the right"

Example:
    echo "hello" > hello.txt
        dumps the string "hello" into the file hello.txt

Called "redirecting standard output"

    somecommand 2> hello.txt    [redirects stderr]

----
<
    "takes the file on the right as the input for the command on the left"

    wc -l < filename

    wc -l filename [also works]

Called "redirecting standard input"

----
|
    "takes the standard output from the command on the left and
        makes it the standard input for the command on the right"

    cat something.c | wc -l
    ls | wc -l
    ps aux | grep jondich

Called "piping output of one command into the input of another"
       "piping one command to another"

----

+ Other cool shell things

+ File descriptors and >, <, |