Linux Command Line Syntax Quiz

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Questions and Answers

What command is used to get help with command line syntax?

  • help [--help] (correct)
  • route [-v]
  • man info
  • help -dms

What does the command 'ln' do?

  • Execute a command as another user
  • Delete a link
  • Create a link (correct)
  • Run a command with substitute user and group ID

Which command is used to execute a command as another user?

  • sudo ‐ (correct)
  • route [-v]
  • su ‐
  • man info

What is the purpose of the command 'date'?

<p>Display or set the system date and time (B)</p> Signup and view all the answers

What is the default behavior of the 'sudo' command if no user is specified?

<p>It defaults to running an interactive shell (C)</p> Signup and view all the answers

Which command is used to delete a link?

<p>route [-v] [-A family] del [-net|-host] target (D)</p> Signup and view all the answers

What command is used to change the current directory to the value of the HOME shell variable?

<p>cd (A)</p> Signup and view all the answers

Which command is used to create new directories?

<p>mkdir (C)</p> Signup and view all the answers

What option is used with the 'mkdir' command to create parent directories as needed if they do not already exist?

<p>-p (B)</p> Signup and view all the answers

Which command is used to remove the DIRECTORY(s) if they are empty?

<p>rmdir (D)</p> Signup and view all the answers

What option is used with the 'rmdir' command to remove DIRECTORY and its ancestors?

<p>-p (A)</p> Signup and view all the answers

Which command is used to list information about FILEs?

<p>ls (C)</p> Signup and view all the answers

What option is used with the 'ls' command to display all files?

<p>-a (C)</p> Signup and view all the answers

What command is used to print the name of the current/working directory?

<p>pwd (C)</p> Signup and view all the answers

What command is used to get detailed help on all commands matching a specific pattern?

<p>man [section] page (C)</p> Signup and view all the answers

Flashcards

Command for command line help

The command 'help' with optional '--help' argument provides help on command line syntax.

'ln' command purpose

'ln' command creates a link (symbolic or hard link) to a file or directory.

Execute as another user

The command 'sudo ‐' executes a command with privileges of another user.

'date' command function

'date' command displays or sets the system's date and time.

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Default 'sudo' behavior

If no user is specified, 'sudo' runs an interactive shell.

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Delete link command

The command 'route [-v] [-A family] del [-net|-host] target' deletes a link.

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Change to HOME directory

The command 'cd' changes to the directory specified by the shell variable HOME.

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Create directory command

'mkdir' creates new directories.

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mkdir -p option

The '-p' option with 'mkdir' creates parent directories if they don't exist.

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Remove empty directory

'rmdir' removes empty directories.

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rmdir -p option

The '-p' option with 'rmdir' removes the directory and its ancestors.

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List files command

'ls' lists information about files.

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List all files option

The '-a' option with 'ls' displays all files, including hidden ones.

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Print current directory

'pwd' prints the path of the current working directory.

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Get detailed command help

'man [section] page' provides detailed help on commands by pattern.

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Study Notes

Command Line Basics

  • The --help command is used to get help with command line syntax.
  • The ln command is used to create a link to a file or directory.

Executing Commands as Another User

  • The su command is used to execute a command as another user.

Working with Dates and Times

  • The date command is used to display or set the system date and time.

Sudo Command

  • The default behavior of the sudo command is to run a command with superuser privileges if no user is specified.

File and Directory Management

  • The unlink command is used to delete a link.
  • The cd ~ command is used to change the current directory to the value of the HOME shell variable.
  • The mkdir command is used to create new directories.
  • The -p option is used with the mkdir command to create parent directories as needed if they do not already exist.
  • The rmdir command is used to remove the DIRECTORY(s) if they are empty.
  • The --parents option is used with the rmdir command to remove DIRECTORY and its ancestors.

File Information and Listing

  • The ls command is used to list information about FILEs.
  • The -a option is used with the ls command to display all files, including hidden files.

Working Directory

  • The pwd command is used to print the name of the current/working directory.

Getting Help with Commands

  • The apropos command is used to get detailed help on all commands matching a specific pattern.

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