Linux+ Chapter 3

~ metacharacter

A metacharacter used to represent a user's home directory.

absolute pathname

The full pathname to a certain file or directory starting from the root directory.

binary data file

A file that contains machine language (binary 1s and 0s) and stores information (such as common functions and graphics) used by binary compiled programs.

cat command

A Linux command used to display (or concatenate) the entire contents of a text file to the screen.

cd (change directory) command

A Linux command used to change the current directory in the directory tree.

command mode

One of the two modes in vi; it allows a user to perform any available text-editing task that is not related to inserting text into the document.

concatenation

The joining of text together to make one larger whole. In Linux, words and strings of text are joined together to form a displayed file.

directory

A special file on the filesystem used to organize other files into a logical tree structure.

egrep command

A variant of the grep command used to search files for patterns, using extended regular expressions.

Emacs (Editor MACroS) editor

A popular and widespread text editor more conducive to word processing than vi. It was originally developed by Richard Stallman.

executable program

A file that can be executed by the Linux operating system to run in memory as a process and perform a useful function.

fgrep command

A variant of the grep command that does not allow the use of regular expressions.

file command

A Linux command that displays the file type of a specified filename.

filename

The user-friendly identifier given to a file.

filename extension

A series of identifiers following a dot ( . ) at the end of a filename, used to denote the type of the file; the filename extention .txt denotes a text file.

gedit editor

A common text editor used within GUI environments.

grep command

A Linux command that searches files for patterns of characters using regular expression metacharacters. The command name is short for "global regular expression print.

head command

A Linux command that displays the first set of lines of a text file; by default, the head command displays the first 10 lines.

home directory

A directory on the filesystem set aside for users to store personal files and information.

insert mode

One of the two modes in vi; it allows the user to insert text into the document but does not allow any other functionality.

less command

A Linux command used to display a text file page-by-page on the terminal screen; users can then use the cursor keys to navigate the file.

linked file

The files that represent the same data as other files.

ll command

An alias for the ls -l command; it gives a long file listing.

log file

A file that contains past system events.

ls command

A Linux command used to list the files in a given directory.

more command

A Linux command used to display a text file page by page and line by line on the terminal screen.

named pipe file

A temporary connection that sends information from one command or process in memory to another; it can also be represented by a file on the filesystem.

nano editor

A user-friendly terminal text editor that uses Ctrl key combinations to perform basic functions.

od command

A Linux command used to display the contents of a file in octal format.

parent directory

The directory that is one level closer to the root directory in the directory tree relative to your current directory.

pwd (print working directory) command

A Linux command used to display the current directory in the directory tree.

regexp

The special metacharacters used to match patterns of text within text files; they are commonly used by text tool commands, including grep.

regular expressions

The special metacharacters used to match patterns of text within text files; they are commonly used by text tool commands, including grep.

relative pathname

The pathname of a target directory relative to your current directory in the tree.

socket file

A named pipe connecting processes on two different computers; it can also be represented by a file on the filesystem.

special device file

A file used to identify hardware devices such as hard disks and serial ports.

strings command

A Linux command used to search for and display text characters in a binary file.

subdirectory

A directory that resides within another directory in the directory tree.

Tab-completion feature

A feature of the BASH shell that fills in the remaining characters of a unique filename or directory name when the user presses the Tab key.

tac command

A Linux command that displays a file on the screen, beginning with the last line of the file and ending with the first line of the file.

tail command

A Linux command used to display lines of text at the end of a file; by default, the tail command displays the last 10 lines of the file.

text file

A file that stores information in a readable text format.

text tools

The programs that allow for the creation, modification, and searching of text files.

vi editor

A powerful command-line text editor available on most UNIX and Linux systems.

wildcard metacharacters

The metacharacters used to match certain characters in a file or directory name; they are often used to specify multiple files.

~ metacharacter

A metacharacter used to represent a user's home directory.

absolute pathname

The full pathname to a certain file or directory starting from the root directory.

binary data file

A file that contains machine language (binary 1s and 0s) and stores information (such as common functions and graphics) used by binary compiled programs.

cat command

A Linux command used to display (or concatenate) the entire contents of a text file to the screen.

cd (change directory) command

A Linux command used to change the current directory in the directory tree.

command mode

One of the two modes in vi; it allows a user to perform any available text-editing task that is not related to inserting text into the document.

concatenation

The joining of text together to make one larger whole. In Linux, words and strings of text are joined together to form a displayed file.

directory

A special file on the filesystem used to organize other files into a logical tree structure.

egrep command

A variant of the grep command used to search files for patterns, using extended regular expressions.

Emacs (Editor MACroS) editor

A popular and widespread text editor more conducive to word processing than vi. It was originally developed by Richard Stallman.

executable program

A file that can be executed by the Linux operating system to run in memory as a process and perform a useful function.

fgrep command

A variant of the grep command that does not allow the use of regular expressions.

file command

A Linux command that displays the file type of a specified filename.

filename

The user-friendly identifier given to a file.

filename extension

A series of identifiers following a dot ( . ) at the end of a filename, used to denote the type of the file; the filename extention .txt denotes a text file.

gedit editor

A common text editor used within GUI environments.

grep command

A Linux command that searches files for patterns of characters using regular expression metacharacters. The command name is short for "global regular expression print.

head command

A Linux command that displays the first set of lines of a text file; by default, the head command displays the first 10 lines.

home directory

A directory on the filesystem set aside for users to store personal files and information.

insert mode

One of the two modes in vi; it allows the user to insert text into the document but does not allow any other functionality.

less command

A Linux command used to display a text file page-by-page on the terminal screen; users can then use the cursor keys to navigate the file.

linked file

The files that represent the same data as other files.

ll command

An alias for the ls -l command; it gives a long file listing.

log file

A file that contains past system events.

ls command

A Linux command used to list the files in a given directory.

more command

A Linux command used to display a text file page by page and line by line on the terminal screen.

named pipe file

A temporary connection that sends information from one command or process in memory to another; it can also be represented by a file on the filesystem.

nano editor

A user-friendly terminal text editor that uses Ctrl key combinations to perform basic functions.

od command

A Linux command used to display the contents of a file in octal format.

parent directory

The directory that is one level closer to the root directory in the directory tree relative to your current directory.

pwd (print working directory) command

A Linux command used to display the current directory in the directory tree.

regexp

The special metacharacters used to match patterns of text within text files; they are commonly used by text tool commands, including grep.

regular expressions

The special metacharacters used to match patterns of text within text files; they are commonly used by text tool commands, including grep.

relative pathname

The pathname of a target directory relative to your current directory in the tree.

socket file

A named pipe connecting processes on two different computers; it can also be represented by a file on the filesystem.

special device file

A file used to identify hardware devices such as hard disks and serial ports.

strings command

A Linux command used to search for and display text characters in a binary file.

subdirectory

A directory that resides within another directory in the directory tree.

Tab-completion feature

A feature of the BASH shell that fills in the remaining characters of a unique filename or directory name when the user presses the Tab key.

tac command

A Linux command that displays a file on the screen, beginning with the last line of the file and ending with the first line of the file.

tail command

A Linux command used to display lines of text at the end of a file; by default, the tail command displays the last 10 lines of the file.

text file

A file that stores information in a readable text format.

text tools

The programs that allow for the creation, modification, and searching of text files.

vi editor

A powerful command-line text editor available on most UNIX and Linux systems.

wildcard metacharacters

The metacharacters used to match certain characters in a file or directory name; they are often used to specify multiple files.