Chapter 5

Chapter 5

Editing Text Files

Basic Concept

• A text editor works on a file buffer that is a memory copy of a disk file

• The disk file is not updated until we save the memory buffer

• Common UNIX text editors– ed– pico– vi– emacs, ue, XEmacs, emacs21

Table 5.1 Common Functions of LINUX Text Editors

• A text editor works on a file buffer that is a memory copy of a disk file• Usually the disk file is not updated until we save the memory buffer

Figure 5.1  First pico screen display

Figure 5.2  Saving a file with a name in pico

Table 5.2 Keystroke Commands and Their Actions in pico

Table 5.3 Important Cursor Movement Keystroke Commands in pico

Figure 5.3  Cut and pasted linespaced text in pico

Figure 5.4  LINUX vi screen with example script file

Figure 5.5  Operating modes of the vi text editor

Figure 5.6 The vi start-up screen

Table 5.4 Examples of vi Command Syntax

Table 5.5 Important Keys for the Insert Mode

Table 5.6 Important Commands for the Command Mode

Figure 5.7  Saved file firstvi

Figure 5.8  Final form of file firstvi

Table 5.7 Cursor movement and Keyboard Editing Commands

Table 5.8 Examples of the Syntax for the yank and put Commands

Table 5.9 Examples of the Syntax for the substitute Command

Table 5.10 Important Environment Options for vi

Figure 5.9  First emacs screen display

Table 5.11 Important emacs Commands

Table 5.12 Important emacs Cursor Movement and Editing Commands

Figure 5.10 The emacs display of the file alien

Figure 5.11  The file alien2 after the buffer contents have been saved

Table 5.13 Important Keyboard Macro Commands

Figure 5.12  The file datafile with 10 rows of data

Table 5.14 Important emacs Kill and Yank Commands

Table 5.15 Interactive Search and Replace Actions

Figure 5.13  The layout of the first XEmacs screen display

Figure 5.14  Initial display of datafile in XEmacs

Table 5.16 XEmacs Pull-Down Menu Choices Described

Table 5.17 XEmacs Toolbar Button Descriptions

Figure 5.15  File alien after being edited in XEmacs

Table 5.18 Important Readline Variables

Table 5.19 Commonly Used Bindable Readline Commands

Table 5.19 Commonly Used Bindable Readline Commands

Table 5.19 Commonly Used Bindable Readline Commands

Table 5.19 Commonly Used Bindable Readline Commands