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<HTML><HEAD><TITLE>Index</TITLE></HEAD><BODY BGCOLOR="#FFFFFF" TEXT="#000000"><P><A HREF="../index.htm"><IMG SRC="../gifs/smbanns.gif" ALT="Book Home" BORDER=0></A><P><FONT SIZE="-1"><A HREF="idx_0.htm">Symbols</A>| <A HREF="idx_a.htm">A</A>| <A HREF="idx_b.htm">B</A>| <A HREF="idx_c.htm">C</A>| <A HREF="idx_d.htm">D</A>| E| <A HREF="idx_f.htm">F</A>| <A HREF="idx_g.htm">G</A>| <A HREF="idx_h.htm">H</A>| <A HREF="idx_i.htm">I</A>| <A HREF="idx_j.htm">J</A>| <A HREF="idx_k.htm">K</A>| <A HREF="idx_l.htm">L</A>| <A HREF="idx_m.htm">M</A>| <A HREF="idx_n.htm">N</A>| <A HREF="idx_o.htm">O</A>| <A HREF="idx_p.htm">P</A>| <A HREF="idx_q.htm">Q</A>| <A HREF="idx_r.htm">R</A>| <A HREF="idx_s.htm">S</A>| <A HREF="idx_t.htm">T</A>| <A HREF="idx_u.htm">U</A>| <A HREF="idx_v.htm">V</A>| <A HREF="idx_w.htm">W</A>| <A HREF="idx_x.htm">X</A>| <A HREF="idx_y.htm">Y</A>| <A HREF="idx_z.htm">Z</A></FONT><H1>Index: E</H1><DL><DT><A NAME="ebcdic-conversion">EBCDIC conversion</A>: <A HREF="../ch35_12.htm">35.12. Converting Between ASCII and EBCDIC </A><DT><A NAME="echo-command">echo command</A>: <A HREF="../ch06_08.htm">6.8. Shell Variables </A><DD><DL> <DT>in bash cells: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>in Bourne shell scripts: <A HREF="../ch44_12.htm">44.12. Trapping Exits Caused by Interrupts </A> <DT>in C shell: <A HREF="../ch47_02.htm#UPT-ART-393-SECT-1.1.1">47.2.1.1. Writing Files </A> <DT>combining two: <A HREF="../ch45_30.htm#UPT-ART-232-SECT-1.2">45.30.2. Using echo with awk, colrm, or cut </A> <DT>command-line arguments: <A HREF="../ch08_06.htm">8.6. Output Command-Line Arguments </A> <DT>control characters used with <DD><DL> <DT><A HREF="../ch45_35.htm#UPT-ART-7882-SECT-1.1">45.35.1. With echo </A> <DT><A HREF="../ch45_35.htm#UPT-ART-7882-SECT-1.2">45.35.2. With tr and echo </A> </DL> <DT>creating error messages: <A HREF="../ch08_06.htm#UPT-ART-7911-SECT-1.2">8.6.2. Making Error Messages </A> <DT>debugging using: <A HREF="../ch46_02.htm">46.2. Quoting Trouble? Think, Then Use echo </A> <DT>-e option: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>-E option: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>escape sequences interpreted by: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>examples <DD><DL> <DT><A HREF="../ch44_05.htm">44.5. Test String Values with Bourne Shell case </A> <DT><A HREF="../ch44_12.htm">44.12. Trapping Exits Caused by Interrupts </A> <DT><A HREF="../ch44_18.htm">44.18. Standard Command-Line Parsing </A> <DT><A HREF="../ch45_27.htm">45.27. Turn Off echo for "Secret" Answers</A> <DT><A HREF="../ch47_02.htm#UPT-ART-393-SECT-1.1.1">47.2.1.1. Writing Files </A> <DT><A HREF="../ch47_02.htm#UPT-ART-393-SECT-1.4">47.2.4. Quoting </A> </DL> <DT>external versions of: <A HREF="../ch08_11.htm">8.11. Which One Will bash Use? </A> <DT>interpreting octal numbers: <A HREF="../ch45_35.htm#UPT-ART-7882-SECT-1.1">45.35.1. With echo </A> <DT>-n option: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>sending escape sequences: <A HREF="../ch41_09.htm">41.9. Commands to Adjust Your Terminal </A> <DT>shell scripts using: <A HREF="../ch45_27.htm">45.27. Turn Off echo for "Secret" Answers</A> <DT>showing values of variables: <A HREF="../ch06_01.htm#UPT-ART-1170">6.1. What Environment Variables Are Good For </A> <DT>turning off: <A HREF="../ch45_27.htm">45.27. Turn Off echo for "Secret" Answers</A> <DT>version differences: <A HREF="../ch46_10.htm">46.10. A Portable echo Command </A> <DT>writing special escape sequences: <A HREF="../ch07_06.htm">7.6. Session Information in Your Terminal's Status Line </A></DL><DT><A NAME="echo-flag">echo flag, turning off</A>: <A HREF="../ch41_02.htm#UPT-ART-1140-SECT-1.2">41.2.2. Handling Most Characters </A><DT><A NAME="echo-shell-variable">echo shell variable</A><DD><DL> <DT><A HREF="../ch06_09.htm">6.9. Special C Shell Variables </A> <DT><A HREF="../ch08_17.htm">8.17. verbose and echo Variables Show Quoting </A></DL><DT><A NAME="echoing">echoing</A><DD><DL> <DT>smart: <A HREF="../ch41_05.htm">41.5. Why Some Systems Backspace over Prompts </A></DL><DT><A NAME="ed-editor">ed editor</A><DD><DL> <DT>diff command and: <A HREF="../ch28_09.htm">28.9. ex Scripts Built by diff </A> <DT>file size limits: <A HREF="../ch33_08.htm">33.8. Batch Editing Gotcha: Editors Bomb on Big Files </A> <DT>no matches: <A HREF="../ch33_07.htm">33.7. ed/ex Batch Edits: Avoid Errors When No Match </A></DL><DT><A NAME="ediff-script">ediff script</A><DD><DL> <DT><A HREF="../ch28_08.htm">28.8. More Friendly diff Output </A> <DT><A HREF="../ch52_04.htm">52.4. Quick Descriptions of What's on the Disc </A></DL><DT><A NAME="edit-command">edit command (SCCS)</A>: <A HREF="../ch20_13.htm">20.13. SCCS Basics </A><DT><A NAME="editing">editing</A><DD><DL> <DT>compressed files: <A HREF="../ch24_11.htm">24.11. Edit Compressed Files with zvi, zex, and zed </A> <DT>paired item checking: <A HREF="../ch29_09.htm">29.9. Looking for Closure </A> <DT>with power tools: <A HREF="../ch01_06.htm">1.6. Power Tools for Editing </A> <DT>spell checking: (see <A HREF="idx_s.htm#spell-checking">spell checking</A>) <DT>with file comparisons: <A HREF="../ch28_09.htm">28.9. ex Scripts Built by diff </A></DL><DT><A NAME="editor-environment-variable">EDITOR environment variable</A>: <A HREF="../ch06_03.htm">6.3. Predefined Environment Variables </A><DT><A NAME="editors">editors</A><DD><DL> <DT>ed: (see <A HREF="idx_e.htm#ed-editor">ed editor</A>) <DT>EDITOR variable: <A HREF="../ch06_03.htm">6.3. Predefined Environment Variables </A> <DT>Emacs: (see <A HREF="idx_e.htm#emacs-editor">Emacs editor</A>) <DT>ex: (see <A HREF="idx_e.htm#ex-editor">ex editor</A>) <DT>patch program: (see <A HREF="idx_p.htm#patch-program">patch program</A>) <DT>qsubst program: <A HREF="../ch33_10.htm">33.10. Quick Globals from the Command Line with qsubst </A> <DT>scripting line editors: <A HREF="../ch33_01.htm#UPT-ART-7965">33.1. Why Line Editors Aren't Dinosaurs </A> <DT>sed: (see <A HREF="idx_s.htm#sed-editor">sed editor</A>) <DT>vi: (see <A HREF="idx_v.htm#vi-editor">vi editor</A>)</DL><DT><A NAME="egrep">egrep</A>: <A HREF="../ch52_04.htm">52.4. Quick Descriptions of What's on the Disc </A><DT><A NAME="egrep-expressions">egrep expressions</A><DD><DL> <DT>calendar command: <A HREF="../ch48_04.htm">48.4. Automatic Reminders and More: calendar </A> <DT>case statements building: <A HREF="../ch48_02.htm">48.2. Online Phone and Address Lists </A> <DT>examples: <A HREF="../ch48_02.htm">48.2. Online Phone and Address Lists </A> <DT>for loop building: <A HREF="../ch48_02.htm">48.2. Online Phone and Address Lists </A> <DT>options: <A HREF="../ch48_02.htm">48.2. Online Phone and Address Lists </A></DL><DT><A NAME="egrep-script">egrep script</A><DD><DL> <DT><A HREF="../ch17_21.htm">17.21. lookfor: Which File Has that Word? </A> <DT><A HREF="../ch26_04.htm#UPT-ART-427-SECT-1.11">26.4.11. Extended Regular Expressions </A> <DT><A HREF="../ch27_05.htm">27.5. Extended Searching for Text with egrep </A> <DT><A HREF="../ch27_09.htm">27.9. New greps Are Much Faster </A> <DT><A HREF="../ch27_16.htm">27.16. Faking Case-Insensitive Searches </A> <DT>| (vertical bar): <A HREF="../ch27_05.htm">27.5. Extended Searching for Text with egrep </A> <DT>catman compared to: <A HREF="../ch50_03.htm">50.3. apropos on Systems Without apropos </A> <DT>examples: <A HREF="../ch50_03.htm">50.3. apropos on Systems Without apropos </A> <DT>-f option: <A HREF="../ch27_07.htm">27.7. grepping for a List of Patterns </A> <DT>-i option: <A HREF="../ch50_06.htm">50.6. Searching Online Manual Pages </A> <DT>picking the processes to kill: <A HREF="../ch38_13.htm">38.13. Interactively Kill Processes Matching a Pattern </A> <DT>plus sign (+): <A HREF="../ch27_05.htm">27.5. Extended Searching for Text with egrep </A> <DT>question mark (?): <A HREF="../ch27_05.htm">27.5. Extended Searching for Text with egrep </A> <DT>searching manual pages: <A HREF="../ch50_06.htm">50.6. Searching Online Manual Pages </A></DL><DT><A NAME="eight.2dbit-filenames">eight-bit filenames</A>: <A HREF="../ch23_15.htm">23.15. Using unlink to Remove a File with a Strange Name </A><DT><A NAME="elapsed-time">elapsed time</A><DD><DL> <DT><A HREF="../ch39_02.htm">39.2. Timing Programs </A> <DT><A HREF="../ch39_05.htm">39.5. Why Is the System So Slow? </A></DL><DT><A NAME="elookfor">elookfor</A>: <A HREF="../ch52_04.htm">52.4. Quick Descriptions of What's on the Disc </A><DT><A NAME="elookfor-script">elookfor script</A>: <A HREF="../ch17_21.htm">17.21. lookfor: Which File Has that Word? </A><DT><A NAME="else-statement">else statement</A><DD><DL> <DT><A HREF="../ch44_08.htm">44.8. Test Exit Status with the if Statement </A> <DT>(see also <A HREF="idx_i.htm#if-loops">if loops</A>) <DT>examples: <A HREF="../ch44_08.htm">44.8. Test Exit Status with the if Statement </A></DL><DT><A NAME="em.2ddashes">em-dashes</A>: <A HREF="../ch43_21.htm">43.21. Preprocessing troff Input with sed </A><DT><A NAME="emacs">Emacs</A>: <A HREF="../ch52_04.htm">52.4. Quick Descriptions of What's on the Disc </A><DT><A NAME="emacs">emacs</A><DD><DL> <DT>emacs mode command-line editing: <A HREF="../ch11_13.htm">11.13. Shell Command-Line Editing </A></DL><DT><A NAME="emacs-editor">Emacs editor</A><DD><DL> <DT>abbreviations: <A HREF="../ch32_11.htm">32.11. Using Word Abbreviation Mode </A> <DT>advantages over other editors: <A HREF="../ch32_01.htm#UPT-ART-5540">32.1. Emacs: The Other Editor </A> <DT>auto-save file: <A HREF="../ch32_04.htm">32.4. Backup and Auto-Save Files </A> <DT>backup file: <A HREF="../ch32_04.htm">32.4. Backup and Auto-Save Files </A> <DT>C shell's PWD and: <A HREF="../ch32_09.htm">32.9. Unset PWD Before Using Emacs </A> <DT>command completion: <A HREF="../ch32_06.htm">32.6. Command Completion </A> <DT>global initialization file: <A HREF="../ch32_03.htm">32.3. Customizations and How to Avoid Them </A> <DT>insert mode versus overwrite: <A HREF="../ch32_05.htm">32.5. Putting Emacs in Overwrite Mode </A> <DT>key mapping: <A HREF="../ch32_07.htm">32.7. Mike's Favorite Time Savers </A> <DT>mouse-based editors versus: <A HREF="../ch32_02.htm">32.2. Emacs Features: A Laundry List </A> <DT>quoting control characters: <A HREF="../ch32_10.htm">32.10. Inserting Binary Characters into Files </A> <DT>search customizations: <A HREF="../ch32_08.htm">32.8. Rational Searches </A> <DT>x-on/x-off flow control: <A HREF="../ch32_12.htm">32.12. Getting Around Emacs Flow Control Problems </A></DL><DT><A NAME="emacs-editor">emacs editor</A><DD><DL> <DT>directory for: <A HREF="../ch04_04.htm">4.4. Directories for Emacs Hacks </A> <DT>temporary files generated by: <A HREF="../ch14_11.htm">14.11. Finding (Anyone's) Home Directory, Quickly </A></DL><DT><A NAME=".2eemacs-file">.emacs file</A><DD><DL> <DT><A HREF="../ch32_03.htm">32.3. Customizations and How to Avoid Them </A> <DT><A HREF="../ch32_11.htm#UPT-ART-7860-SECT-1.2">32.11.2. Making Word Abbreviations Part of Your Startup </A></DL><DT><A NAME=".2eemacs.5fml-file">.emacs_ml file</A>: <A HREF="../ch32_07.htm">32.7. Mike's Favorite Time Savers </A><DT><A NAME=".2eemacs.5fml-file">.emacs_ml file</A>: <A HREF="../ch52_04.htm">52.4. Quick Descriptions of What's on the Disc </A><DT><A NAME="email">email</A><DD><DL> <DT>multiple mailboxes: <A HREF="../ch21_08.htm#UPT-ART-1220-SECT-1.1.1">21.8.1.1. Multiple Mailboxes </A> <DT>notification of: <A HREF="../ch21_08.htm">21.8. The MAILCHECK and mail Variables Check More than Mail</A></DL><DT><A NAME="emoticons">emoticons</A>: <A HREF="../ch51_12.htm">51.12. You Don't Have Enough Smileys? </A><DT><A NAME="empty-files">empty files</A><DD><DL> <DT><A HREF="../ch13_14.htm">13.14. What Can You Do with an Empty File? </A> <DT><A HREF="../ch21_07.htm">21.7. Setting File Modification Time with touch </A></DL><DT><A NAME="emptying-files">emptying files</A>: <A HREF="../ch24_01.htm#UPT-ART-1730">24.1. Instead of Removing a File, Empty It </A><DT><A NAME="enable-command">enable command</A>: <A HREF="../ch08_11.htm">8.11. Which One Will bash Use? </A>⌨️ 快捷键说明
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