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CIT222 - Ch4 Terms

CIT222 - Chapter 4 Key Terms

~ 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 used by binary compiled programs.
cat Linux command used to display or concatenate the entire contents of a text file to the screen.
cd (change directory) Linux command used to change the current directory in the directory tree.
command mode one of the two input modes in vi; 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 A variant of the grep command used to search files for patterns using extended regular expressions.
Emacs editor A popular and widespread text editor more conductive to word processing than vi; 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 A variant of the grep command that does not allow the use of regular expressions.
file 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 file; the extension .txt is a text file.
gedit editor A text editor for the GNOME desktop
grep (Global Regular Expression Print) Linux command that searches within files for patterns of characters using regular expression metacharacters
head Linux command that displays the first set of lines of a text file: by default the first 10 lines are displayed.
home directory Directory on the filesystem set aside for users to store personal files and information.
insert mode One of two input modes in vi; it allows the user the ability to insert text into the document but does not allow for any other functionality.
kedit editor A text editor for the KDE desktop
less Linux command used to display a text file page-by-page on the terminal screen; users can then use the cursor keys to navigate up or down in the file.
linked file The files that represent the same data as other files (shortcut in Windows)
ll Linux alias for the ls
log file A file that contains past system events
ls command Linux command used to list the files in a given directory
mcedit A user-friendly terminal text editor that supports regexp and the computer mouse.
more Linux command used to display a text file page-by-page and line-by-line on the screen. Can only page down in the file, not navigate up.
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.
nedit editor A commonly used graphical text editor available in most Linux distributions
od Linux command used to display the output of a file in octal format
pwd (print working directory) Linux command used to display your current directory in the Linux tree
regular expression (regexp) The special metacharacters used to match patterns of text within text files; they are commonly used by many text tool commands such as 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 Linux command used to search for and display text characters in a binary file.
subdirectory Directory that resides within another directory in the tree
Tab-completion feature Feature of BASH shell that fills in the remaining characters of a unique filename or directory name when the user presses the Tab key.
tac Linux command that displays a file to the screen beginning with the last line of the file and ending with the first line. (reverse of cat)
tail Linux command used to display the last set number of lines of text in 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 format
text tools Program that allows for the creation, modification, and searching of text files.
vi editor Powerful command-line text editor available on Linux and UNIX systems
wildcard metacharacters used to match certain characters in the file or directory name; often used to specify multiple files
xemacs editor a graphical version of the Emacs text editor.
Created by: Leisac