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CIT222 - Ch4 Terms
CIT222 - Chapter 4 Key Terms
| Question | Answer |
|---|---|
| ~ 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. |
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