[Intro Music]
Let's briefly summarize what we
discussed in previous lectures.
First every process has three
different data streams STDIN,
STDOUT and STDERR. STDIN is
incoming data stream, STDOUT and
STDERR are two different
outgoing data streams from every
process. By default when you start
a specific process inside of the
shell like Z shell, or bash shell, or
sh shell, those outgoing flows
STDOUT and STDERR will be shown
directly on your screen. But you're
able to redirect those data flows
to files, and you could even use
different files for STDOUT and STDERR.
Some processes also accept
some text via STDIN. An example of
such process is 'cat'. Next, you're
able to concatenate different
processes and send data from
STDOUT from one process to STDIN of
next process using pipe, '|' operator.
And you could pipe multiple
processes one by one. That's all
for those lectures. And next, let's
move to next subsection where we
will talk about files
management, and I'll explain you how
to create new files, folders, how to
edit contents of files and so on. I
will see you guys in the next
section. Bye-Bye.
[no audio]