Sometimes, we need to change where certain kinds of output end up. This video discusses output redirection.
- [Narrator] Working at the command line,…we mostly have been using output…that comes back to the screen,…showing us what's been done by a program.…But before we move on,…it's important to understand how to get that information…into a file that we can use later…or send to someone else.…In the Bash shell, and in other shells as well,…there are three general areas or streams,…that we work with text through,…which aren't immediately evident at a glance.…There's the standard input, or standard in,…which is keyboard input,…the standard output, or standard out,…which is the result of running commands…that comes back to our screen…when commands execute correctly.…
The third, is standard error,…which is the result that comes back from commands…when they don't execute correctly,…and they return an error message to us.…Standard input is given the descriptor of zero.…Standard output gets one.…And standard error is two.…We'll be using these descriptors to redirect…the information to other places.…Let's take a look at redirecting some output.…
- Recognize what the characters “-h” represent in the statement “df –h/home/alice/Documents”.
- Explain how to recall a previous command in Bash.
- Identify what the command “ls -l” will show.
- Recall what is needed to use the find command to look for files by name, size, and so on.
- List the two modes file permissions can be set to.
- Recall why many command line tools are intended to be used in pipes with other commands.
- Explain what the command “grep -E "" report.txt” will show.
- Identify what the “>” symbol is often used for.
Skill Level Beginner
Learning SQL Server Development on Linuxwith Joey D'Antoni1h 54m Intermediate
What you should know1m 51s
1. Setting Up Your Environment
2. Command-Line Basics
3. Files, Folders, and Permissions
4. Common Command-Line Tasks and Tools
5. A Peek at Some More Advanced Topics
Next steps1m 28s
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