Help for every Linux command is readily available at our fingertip just by utilizing a couple of basic tools: help, man, and info.
- [Instructor] Knowing how to get information…about commands in Linux is paramount…to understanding such a powerful operating system.…Let's start by using the built-in --help option.…Open a terminal by going to…Applications, Favorites, and Terminal.…I'm going to make mine full screen and bump the font size.…Type in ls --help and hit Enter.…The --help information is built in to most Linux commands…so it will always be available.…If the output is too long, use the scroll bar…or press Shift + Page Up to scroll up.…
At the top of the output of ls --help,…it shows the command syntax or usage.…- -help doesn't work for all commands.…For instance, cd --help results in an error message.…The reason for this is that cd is built into the bash shell…so it doesn't exist as a separate command on the disk.…For those commands built into the bash shell,…we can use the help command to get the syntax.…Type in help cd and hit Enter.…
Between the --help option and the help command,…we should be able to get quick help on most any command.…
- Distinguish the difference between the –help option and the output of the man command.
- Define what the uptime command is used for.
- Compare the more command with the less command.
- State which compression algorithm is built into the tar command.
- Write where all operating system files in Linux are stored.
- List the three mods in vi.
Skill Level Intermediate
Setting Up a Red Hat Enterprise Linux Serverwith Sandra Toner2h 46m Intermediate
Linux: Bash Shell and Scriptswith Kevin Dankwardt2h 46m Intermediate
1. Getting Help
2. Using Basic Commands
3. Navigating File Systems
4. Editing Text
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