Section 22.4, Setting an Exact umask , Section 38.5, The ps Command , Section 38.10, Destroying Processes with kill , Section 39.7, Checking System Load: uptime , Section 40.12, Periodic Program Execution: The cron Facility , Section 40.13, Adding crontab Entries , Section 40.14, Including Standard Input Within a cron Entry

Section 8.16, Quoting Handles Special Characters in Filenames , Section 8.17, verbose and echo Variables Show Quoting , Section 8.18, Here Documents , Section 8.19, "Special" Characters and Operators , Section 16.21, Finding All Directories with the Same Name , Section 16.24, Counting Files by Types , Section 16.25, Listing Files by Age and Size , Section 17.2, Delving Through a Deep Directory Tree , Section 17.4, Looking for Files with Particular Names , Section 17.5, Searching for Old Files , Section 17.10, Running Commands on What You Find , Section 17.13, Searching for Files by Type , Section 17.14, Searching for Files by Size , Section 17.15, Searching for Files by Permission , Section 17.16, Searching by Owner and Group , Section 17.25, Keeping find From Searching Networked Filesystems , Section 20.2, Make Your Own Backups , Section 20.3, How to Make Backups with a Local Tape Drive , Section 20.4, Restoring Files from Tape with tar , Section 20.5, Using tar to a Remote Tape Drive , Section 20.7, Creating a Timestamp File for Selective Backups , Section 20.8, Telling tar Which Files to Exclude or Include , Section 20.12, Protecting Files with SCCS or RCS , Section 20.13, SCCS Basics , Section 20.14, RCS Basics , Section 22.2, Tutorial on File and Directory Permissions , Section 22.9, Protect Important Files: Make Them Unwritable , Section 23.6, A Faster Way to Remove Files Interactively , Section 23.7, Safer File Deletion in Some Directories , Section 26.2, Don't Confuse Regular Expressions with Wildcards , Section 26.4, Using Metacharacters in Regular Expressions , Section 31.11, Typing in Uppercase Without CAPS LOCK , Section 31.13, Making Cursor Keys Work in vi Text-input Mode

Section 11.13, Shell Command-Line Editing , Section 32.1, Emacs: The Other Editor , Section 32.3, Customizations and How to Avoid Them , Section 32.6, Command Completion , Section 32.12, Getting Around Emacs Flow Control Problems , Section 44.18, Standard Command-Line Parsing

Section 7.3, C Shell Prompt Causes Problems in vi, rsh, etc. , Section 8.12, Which One Will the C Shell Use? , Section 14.12, Marking Your Place with a Shell Variable , Section 16.5, The Three UNIX File Times , Section 17.22, Finding the Links to a File , Section 17.24, Skipping Some Parts of a Tree in find (A More Selective -prune) , Section 20.6, Writing a Tape Drive on a Remote Machine , Section 22.20, Why Can't You Change File Ownership Under BSD UNIX? , Section 23.18, How Making and Deleting Directories Works , Section 23.19, Deleting (BSD) Manual Pages that Aren't Read , Section 23.22, Using find to Clear Out Unneeded Files , Section 24.3, Unlinking Open Files Isn't a Good Idea , Section 24.16, Trimming a Huge Directory , Section 30.3, Mice vs. vi , Section 30.34, vi Line Commands vs. Character Commands , Section 33.7, ed/ex Batch Edits: Avoid Errors When No Match , Section 34.23, sed Newlines, Quoting, and Backslashes in a Shell Script , Section 38.7, Why ps Prints Some Commands in Parentheses , Section 38.16, Why You Can't Kill a Zombie , Section 38.17, Automatically Kill Background Processes on Logout in csh , Section 41.2, stty and All That Stuff , Section 41.6, Using sleep to Keep Port Settings , Section 45.2, The Story of : # #! , Section 45.4, Fun with #! , Section 45.4 , Section 45.14, Finding the Last Command-Line Argument , Section 45.24, A Shell Can Read a Script from its Standard Input, But... , Section 45.26, Quoted hereis Document Terminators: sh vs. csh , Section 46.2, Quoting Trouble? Think, Then Use echo , Section 46.6, Watch Out for Bourne Shell -e Bug , Section 46.7, Quoting and Command-Line Parameters

Section 32.1 , Section 32.3 , Section 32.4, Backup and Auto-Save Files , Section 32.5, Putting Emacs in Overwrite Mode , Section 32.11, Using Word Abbreviation Mode , Section 32.12

Section 1.6, Power Tools for Editing , Section 1.28, Some Gotchas with Background Processing , Section 26.1, That's an Expression , Section 26.3, Understanding Expressions , Section 26.5, Getting Regular Expressions Right , Section 26.6, Just What Does a Regular Expression Match? , Section 26.7, Limiting the Extent of a Match , Section 26.8, I Never Meta Character I Didn't Like , Section 27.2, Searching for Text with grep , Section 27.5, Extended Searching for Text with egrep , Section 28.1, Checking Differences with diff , Section 28.2, Comparing Three Different Versions with diff3 , Section 29.1, The UNIX spell Command , Section 29.3, How Do I Spell That Word? , Section 29.4, Inside spell , Section 30.10, Confirming Substitutions in ex and vi , Section 30.31, vi Word Abbreviation , Section 33.2, Writing Editing Scripts , Section 33.12, Versions of awk , Section 34.3, Testing and Using a sed Script: checksed, runsed , Section 34.4, sed Addressing Basics , Section 34.5, Order of Commands in a Script , Section 34.6, One Thing at a Time , Section 34.7, Delimiting a Regular Expression , Section 34.8, Newlines in a sed Replacement , Section 34.9, Referencing the Search String in a Replacement , Section 34.10, Referencing Portions of a Search String , Section 34.11, Search & Replacement: One Match Among Many , Section 34.13, Hold Space: The Set-Aside Buffer , Section 34.14, Transforming Part of a Line , Section 34.15, Making Edits Across Line Boundaries , Section 34.16, The Deliberate Scrivener , Section 34.18, Multiline Delete , Section 34.20, The sed Test Command , Section 43.2, Introduction to Printing on UNIX , Section 43.18, How nroff Makes Bold and Underline; How to Remove It , Section 43.19, Removing Leading Tabs and Other Trivia , Section 48.10, Working with Names and Addresses

Section 8.5, Command-Line Evaluation , Section 9.25, The C Shell repeat Command , Section 10.2, Aliases for Common Commands , Section 15.7, Getting a List of Matching Files with grep -l , Section 15.8, Getting a List of Non-Matching Files with grep -c , Section 16.12, Useful ls Aliases , Section 25.2, Four Ways to Skin a cat , Section 26.2 , Section 26.9, Valid Metacharacters for Different UNIX Programs , Section 26.10, Pattern Matching Quick Reference with Examples , Section 28.12, Comparing Two Files with comm , Section 28.15, Show Changes in a troff File with diffmk , Section 29.6, Counting Lines, Words, and Characters: wc , Section 30.15, Useful Global Commands (with Pattern Matches) , Section 30.31 , Section 31.2, Save Time and Typing with the vi map Commands , Section 31.6, Protecting Keys from Interpretation by ex , Section 31.8, More Examples of Mapping Keys in vi , Section 33.3, Line Addressing , Section 33.4, Useful ex Commands , Section 33.11, Quick Reference: awk , Section 34.24, Quick Reference: sed , Section 35.10, Splitting Files by Context: csplit , Section 35.14, Cutting Columns or Fields with cut , Section 35.18, Pasting Things in Columns , Section 35.20, Quick Reference: uniq , Section 43.7, Quick-and-Dirty Formatting Before Printing , Section 45.28, Quick Reference: expr , Section 47.3, Conditional Statements with if , Section 47.4, C Shell Variable Operators and Expressions , Section 47.6, Quick Reference: C Shell switch Statement

Section 9.6, String Editing (Colon) Operators , Section 11.7, History Substitutions

Section 2.13, A .cshrc.$HOST File for Per Host Setup , Section 10.5, Sourceable Scripts , Section 16.9, An Alias to List Recently Changed Files , Section 45.32, A Better read Command: grabchars

Section 30.2, What We Cover , Section 31.1, Why Type More Than You Have To?

Section 52.5 , Section 52.6, Don't Have a CD-ROM Drive? , Section 52.8, Building Programs from Source Code

Section 27.11, A Multiline Context grep Using sed , Section 27.14, Compound Searches , Section 34.17, Searching for Patterns Split Across Lines

Section 10.8, Fix Quoting in csh Aliases with makealias and quote , Section 19.7, Extracting Files from a Compressed Archive , Section 22.14, Add Users to a Group to Deny Permission , Section 23.9, delete: Protecting Files from Accidental Deletion , Section 24.18, Huge Files Might Not Take a Lot of Disk Space , Section 27.12, Make Custom grep Commands (etc.) with perl , Section 35.9, Splitting Files at Fixed Points: split , Section 38.3, Managing Processes: Overall Concepts , Section 38.12, Killing All Your Processes , Section 51.11, Making an Arbitrary-Size File for Testing

Section 5.2, The Idea of a Terminal Database , Section 30.28, Keep Track of Functions and Included Files with ctags and tags , Section 41.10, Using terminfo Capabilities in Shell Programs , Section 41.11, How termcap and terminfo Describe Terminals , Section 41.12, Finding Out What Characters Your Terminal's Special Keys Send

Section 30.4, Editing Multiple Files with vi , Section 30.5, Edits Between Files , Section 30.9, Using Search Patterns and Global Commands , Section 30.11, Keep Your Original File, Write to a New File , Section 30.12, Saving Part of a File , Section 31.2 , Section 31.6

Section 3.7, Detaching a Session with screen , Section 5.5, Querying Your Terminal Type: qterm , Section 11.14, More Ways to Do Interactive History Editing , Section 12.9, Running Multiple Shell Sessions with screen , Section 13.11, tpipe-Redirecting stdout to More than One Place , Section 16.20, The vtree Visual Directory Tree Programs , Section 18.7, Linking Directories , Section 18.11, Renaming Files with ren , Section 22.15, Juggling Permissions , Section 22.16, Copying Permissions with cpmod , Section 25.18, Watching Several Files Grow , Section 27.9, New greps Are Much Faster , Section 27.20, A Highlighting grep , Section 28.5, Comparing Files Alongside One Another , Section 28.8, More Friendly diff Output , Section 33.10, Quick Globals from the Command Line with qsubst , Section 35.23, Rotating Text , Section 43.14, nroff/troff and Macro Packages , Section 43.17, Don't Have nroff? Try gnroff or awf , Section 43.21, Preprocessing troff Input with sed , Section 43.25, The Portable Bitmap Package , Section 45.11, The Multipurpose jot Command , Section 48.8, Calendar for 132-Column Terminals or Printers , Section 48.9, PostScript Calendars with pcal , Section 48.11, The index Database Program , Section 48.12, Using index with a Filter , Section 49.5, Base Conversion Using cvtbase , Section 51.7, When You Get Impatient , Section 52.4, Quick Descriptions of What's on the Disc , Section 52.8

Section 18.8, Showing the Actual Filenames for Symbolic Links , Section 18.10, There's More than One Way to Do It , Section 18.14, Relinking Multiple Symbolic Links , Section 27.13, More grep-like Programs Written in Perl , Section 37.2, Why Learn Perl? #1 , Section 37.3, Three Great Virtues of a Programmer

Section 13.16, Store and Show Errors with logerrs , Section 50.8, Which Version Am I Using?

Section 18.8 , Section 18.10 , Section 18.14 , Section 27.13 , Section 37.2 , Section 37.3

Section 13.2, One Argument with a cat Isn't Enough , Section 31.9, Good Stuff for Your .exrc File , Section 37.4, Why Learn Perl? #2 , Section 47.2, C Shell Programming Considered Harmful