Podcast
Questions and Answers
What is the command-line interface provided by in Red Hat Enterprise Linux (RHEL)?
What is the command-line interface provided by in Red Hat Enterprise Linux (RHEL)?
bash
What does the $ character indicate in a shell prompt?
What does the $ character indicate in a shell prompt?
A regular user shell
What three basic parts do commands that are entered at the shell prompt have?
What three basic parts do commands that are entered at the shell prompt have?
Command to run, options to adjust the behavior of the command, arguments, which are typically targets of the command
A terminal is a text-based interface that is used to input instructions to a computer system.
A terminal is a text-based interface that is used to input instructions to a computer system.
The physical console supports multiple virtual consoles, which can run on separate terminals.
The physical console supports multiple virtual consoles, which can run on separate terminals.
Most virtual consoles run a terminal that provides a text login prompt.
Most virtual consoles run a terminal that provides a text login prompt.
The graphical login screen runs on the second virtual console (tty2).
The graphical login screen runs on the second virtual console (tty2).
When you log out of a graphical environment, it exits the virtual console and the physical console automatically switches back to the graphical login screen on the first virtual console.
When you log out of a graphical environment, it exits the virtual console and the physical console automatically switches back to the graphical login screen on the first virtual console.
A headless server does not have a keyboard and display permanently connected to it.
A headless server does not have a keyboard and display permanently connected to it.
A serial console is used to access a server if the server network card becomes misconfigured.
A serial console is used to access a server if the server network card becomes misconfigured.
The serial console is normally used to access the server if the server network card becomes misconfigured and logging to the server over the conventional network connection becomes impossible.
The serial console is normally used to access the server if the server network card becomes misconfigured and logging to the server over the conventional network connection becomes impossible.
Virtual machines and cloud instances often do not provide access to their (simulated) physical or serial console
Virtual machines and cloud instances often do not provide access to their (simulated) physical or serial console
What is the most common way to get a shell prompt on a remote system in Linux?
What is the most common way to get a shell prompt on a remote system in Linux?
What is the command-line program used to establish an SSH connection?
What is the command-line program used to establish an SSH connection?
Flashcards
What is a command line?
What is a command line?
Text-based interface for entering commands into a computer system. It's a program that interprets and executes commands.
What is a shell?
What is a shell?
The program that runs on a computer system and processes commands entered at the command line.
What is a shell prompt?
What is a shell prompt?
The string displayed by the shell when it is waiting for user input.
What is bash?
What is bash?
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What does the $ character at the end of a shell prompt mean?
What does the $ character at the end of a shell prompt mean?
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What does the # character at the end of a shell prompt mean?
What does the # character at the end of a shell prompt mean?
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What is a shell command?
What is a shell command?
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What is a command option?
What is a command option?
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What is a command argument?
What is a command argument?
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What is a terminal?
What is a terminal?
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What is a physical console?
What is a physical console?
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What are virtual consoles?
What are virtual consoles?
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What is a graphical environment?
What is a graphical environment?
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What is a terminal program?
What is a terminal program?
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What is a headless server?
What is a headless server?
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What is a remote system?
What is a remote system?
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What is Secure Shell (SSH)?
What is Secure Shell (SSH)?
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What is OpenSSH?
What is OpenSSH?
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What is the 'ssh' command?
What is the 'ssh' command?
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What is a serial console?
What is a serial console?
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What does running a program mean?
What does running a program mean?
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What is a shell script?
What is a shell script?
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What is the 'root' user?
What is the 'root' user?
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What is the home directory?
What is the home directory?
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What is the current working directory?
What is the current working directory?
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What is the 'cat' command?
What is the 'cat' command?
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What is the 'mkdir' command?
What is the 'mkdir' command?
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What is the 'ls' command?
What is the 'ls' command?
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What is the 'cp' command?
What is the 'cp' command?
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What is the 'mv' command?
What is the 'mv' command?
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What is the 'rm' command?
What is the 'rm' command?
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What is the 'cd ..' command?
What is the 'cd ..' command?
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What is the 'touch' command?
What is the 'touch' command?
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Study Notes
Accessing the Command Line
- The Linux command line uses a program called a shell, with Bash being the default in RHEL.
- The shell prompt indicates whether the user is a regular user or root (superuser).
- Regular user prompt:
[user@host ~]$ - Superuser prompt:
[root@host ~]# - Commands consist of a command name, options (e.g.,
-L), and arguments (e.g.,user01). - A terminal is a text-based interface for entering commands.
Logging into a Local System
- Local logins can be via a physical console (keyboard and display) or a virtual console.
- Switching virtual consoles: Ctrl+Alt+function keys (F1-F6).
- Graphical login environments also run on virtual consoles (e.g., tty1).
- Graphical environment replaces a login prompt if the console isn't already in use.
Logging into a Remote System
- Remote access to headless servers (no physical console) is common.
- Secure Shell (SSH) is the most common method for remote access.
- OpenSSH command
sshfacilitates remote logins.
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Description
Explore the fundamentals of accessing and using the Linux command line, including local and remote login methods. This quiz covers key concepts such as shell prompts, command syntax, and SSH for remote access. Test your knowledge and understanding of these essential skills for navigating the Linux environment.
