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UNIX Hints & Hacks
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Table Of Contents
UNIX Hints & Hacks Index
Table of Contents
UNIX Hints & Hacks
Table of Contents
Copyright
Introduction
l U NIX Knowledge Needed
l T ested UNIX Flavors
l Sh ells and Scripting Languages
l B efore Beginning
l H ints & Hacks Topics
l E xamples: Commands, Functions, Routines, and Procedures
l Sy mbols, Command Syntax, and Notations
l St ructure
l A bout the Author
l D edication
l A cknowledgments
Chapter 1: Topics in Administration
l 1. 1 Collecting System Information
l 1. 2 Backup Key Files!
l 1. 3 Execution on the Last Day of a Month
l 1. 4 Dealing with Unwanted Daemons
l 1. 5 Keep Those Daemons Running
l 1. 6 fuser Instead of ps
l 1. 7 Swap on-the-Fly
l 1. 8 Keep It Up with nohup
l 1. 9 Redirecting Output to Null
l 1. 10 Keeping Remote Users Out
l 1. 11 Rewinding Tapes Fast
l 1. 12 Generating a Range of Numbers
l 1. 13 Remove the ---- Dashes ----
l 1. 14 echo Does ls
l 1. 15 Building Large Dummy Filesence
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l 1. 16 Burning-in Disk Drives
l 1. 17 Bringing a System Down
Chapter 2: Networking
l 2. 1 OSI Networking Model
l 2. 2 Finding the Failure
l 2. 3 Hiding Files with NFS
l 2. 4 Remote Network Configurations
l 2. 5 Shutdown, Halt, or Reboot over the Network
l 2. 6 Talking NFS3 to NFS2
l 2. 7 Unmounting and Busy Devices
l 2. 8 Static Routing or routed
l 2. 9 Get the Ethernet Address with arp
Chapter 3: Security
l 3. 1 Delegating root to Multiple Admins
l 3. 2 The Full Path to Superuser
l 3. 3 Monitoring root in the Password File
l 3. 4 Vulnerabilities in UNIX
l 3. 5 Permissions Levels
l 3. 6 Protect root at All Costs
l 3. 7 File Collecting
l 3. 8 File Encryption
l 3. 9 Clear and Lock
l 3. 10 Power Tool
Chapter 4: System Monitoring
l 4. 1 Monitoring at Boot Time
l 4. 2 Starting with a Fresh Install
l 4. 3 Monitor with tail
l 4. 4 Cut the Log in Half
l 4. 5 Mail a Process
l 4. 6 Watching the Disk Space
l 4. 7 Find the Disk Hog
l 4. 8 Watching by grepping the Difference
l 4. 9 Monitoring with ping
l 4. 10 Monitoring Core Files
l 4. 11 Monitoring Crash Files
l 4. 12 Remember Daylight Savings Time
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l 4. 13 Checking the Time
Chapter 5: Account Management
l 5. 1 User Account Names
l 5. 2 Passwords
l 5. 3 UID
l 5. 4 Group IDs and /etc/group
l 5. 5 GECOS Field
l 5. 6 Home Directories
l 5. 7 Shells and the Password File
l 5. 8 Configuring an Account
l 5. 9 User Account Startup Files
l 5. 10 Using Aliases
l 5. 11 MS-DOS Users
l 5. 12 Changing Shells
l 5. 13 Finding My Displays
l 5. 14 Copy Files to Multiple Home Directories
l 5. 15 Kill an Account
l 5. 16 Nulling the Root Password Without vi
Chapter 6: File Management
l 6. 1 Copy Files with Permissions and Time Stamps
l 6. 2 Copy Files Remotely
l 6. 3 Which tmp Is a Good Temp?
l 6. 4 Dealing with Symbolic Links
l 6. 5 Finding Files with grep
l 6. 6 Multiple grep
l 6. 7 Executing Commands Recursively with find
l 6. 8 Moving and Renaming Groups of Files
l 6. 9 Stripping the Man Pages
l 6. 10 Clean Up DOS Files
l 6. 11 Splitting Files
l 6. 12 Limit the Size of the Core
l 6. 13 uuencode and uudecode
Chapter 7: Displays and Emulations
l 7. 1 Terminal Types
l 7. 2 Setting Terminal Types
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l 7. 3 Make Use of stty
l 7. 4 Hotkeys
l 7. 5 Testing ASCII Terminals
l 7. 6 Troubleshooting ASCII Terminals
l 7. 7 Sharing STDIN/STDOUT on Two Terminals
l 7. 8 Refreshing X
l 7. 9 Killing Resources with xkill
l 7. 10 Setting xterm Titlebars
l 7. 11 Control the Mouse with the Keyboard
l 7. 12 Display from a Remote X Server
l 7. 13 ASCII Table in UNIX
Chapter 8: Editors
l 8. 1 The Anatomy of ed & vi
l 8. 2 The Six Steps to ed
l 8. 3 Six Simple Steps to vi
l 8. 4 Configuring vi Parameters
l 8. 5 Abbreviating vi Commands
l 8. 6 Creating Macros
l 8. 7 Search and Replace
l 8. 8 Other Places to Use vi
l 8. 9 Editing Multiple Files
l 8. 10 Edit, Run, and Edit Again
l 8. 11 Reading STDOUT into vi
l 8. 12 Using vi when tmp Is Full
Chapter 9: Users
l 9. 1 Six Types of Users
l 9. 2 New Users
l 9. 3 Public Relations
l 9. 4 Leave Big Impressions with Little Things
l 9. 5 Handling an Irate User
l 9. 6 Helping Users with Online Tools
l 9. 7 Users Borrowing Equipment
l 9. 8 Outage Notifications
l 9. 9 Users Who Take Care of You
l 9. 10 When Users Leave
Chapter 10: System Administration: The Occupation
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l 10 .1 Three Levels of Administration
l 10 .2 Functions of an Administrator
l 10 .3 Finding a Job Working with UNIX
l 10 .4 Preparing an Administrator's Résumé
l 10 .5 Preparing for an Interview
l 10 .6 Types of Interviews
l 10 .7 Being Interviewed
l 10 .8 Finding the Right Person for the Job
l 10 .9 Interviewing Candidates
l 10 .10 Working with Vendors: Sales and Maintenance Representatives
l 10 .11 Working with Vendor Support
l 10 .12 Working with Local Support Engineers
Appendix A: Basic Scripting Concepts
l B uilding a Script
l R ecursive Scripts
Appendix B: System Installation Checklist
l Sy stem Installation Check List
Appendix C: System Incident Log
l Sy stem Incident Log
l Sy stem Incident Log
Appendix D: Administration Tools and Recommended Organizations
l Sy stem Administration Tools
l N etworking Tools
l R ecommended Organizations
Appendix E: Glossary
Index
Linux: A Network Solution for Your Office Index
Table of Contents
© Copyright Macmillan USA. All rights reserved.
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Index
UNIX Hints & Hacks Contents
Index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Symbols
Index
A
a command (append in insert mode), 1st
a command (append text), 1st, 2nd
abbreviated user account names, 1st, 2nd, 3rd
abbreviating
commands, 1st, 2nd, 3rd, 4th
macros
command execution, 1st, 2nd
HTML files, 1st, 2nd, 3rd, 4th, 5th, 6th
long words and phrases, 1st, 2nd, 3rd, 4th
mixing words, 1st, 2nd, 3rd, 4th, 5th
scripts, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th
system administration, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th
typographical errors, 1st, 2nd, 3rd
access
FTP
restricting, 1st, 2nd, 3rd
local
unmounting devices, 1st
networks
troubleshooting, 1st, 2nd
remote
clear command, 1st
network configuration, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th
passwords, 1st, 2nd, 3rd
ping, 1st, 2nd, 3rd, 4th
reboot command, 1st
restricting, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th, 15th, 16th, 17th, 18th, 19th, 20th, 21st,
22nd
single-user state, 1st
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Index
unmounting, 1st
unmounting devices, 1st
root
monitoring, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th
UID passwords, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th
superuser root account, 1st
access permission, 1st
accounts
see user accounts, 1st
achievements
administrators
resumes, 1st
activating
swap files
on startup, 1st
adding
files
to terminfo, 1st, 2nd, 3rd, 4th, 5th
swap files, 1st, 2nd, 3rd, 4th
user accounts
from command prompts, 1st, 2nd, 3rd, 4th
addresses
Ethernet (MAC)
outputting, 1st, 2nd, 3rd, 4th, 5th
IP
editing, 1st
administration
local, 1st
macros
abbreviating, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th
multitasking, 1st
administrators, 1st
code of ethics, 1st
corporate policy, 1st, 2nd
customer support, 1st
documentation, 1st
employment, 1st
companies, 1st
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Index
conferences, 1st
conferences/seminars, 1st
email, 1st
networking, 1st, 2nd
newspapers, 1st
recruiters, 1st, 2nd
technical job fairs, 1st, 2nd
Usenet newsgroups, 1st, 2nd, 3rd
vendors, 1st, 2nd
web sites, 1st, 2nd
gurus, 1st, 2nd, 3rd
intermediate/advanced, 1st, 2nd, 3rd, 4th
interpersonal skills, 1st, 2nd, 3rd
interviews
candidates, 1st
case scenario questions, 1st, 2nd
employer questions, 1st, 2nd
favorite hard questions, 1st, 2nd, 3rd
file questions, 1st, 2nd, 3rd
in person, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th
interpersonal skills, 1st, 2nd, 3rd, 4th, 5th
nontechnical, 1st
preparation, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th
procedural questions, 1st, 2nd, 3rd
resume verification questions, 1st, 2nd, 3rd
standard questions, 1st, 2nd
system commands, 1st, 2nd, 3rd
technical, 1st
telephone, 1st, 2nd, 3rd, 4th
jobs
newspaper advertisements, 1st
junior-level, 1st, 2nd, 3rd
multiple
root access, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th
networking, 1st
networks, 1st
porting, 1st
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Index
programming, 1st
resumes
achievements, 1st
contact information, 1st, 2nd
contracting/consulting, 1st, 2nd, 3rd, 4th
devices, 1st
education, 1st, 2nd
format, 1st, 2nd, 3rd
keywords, 1st, 2nd, 3rd
multiple, 1st
objectives, 1st, 2nd
operating systems, 1st
organization affiliations, 1st
paper type, 1st, 2nd
sample, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th
size, 1st
software, 1st, 2nd
submitting, 1st
systems, listing, 1st
updating, 1st
vendors, 1st
work experience, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th
salary, 1st, 2nd, 3rd
scripting languages, 1st
security, 1st
senior, 1st, 2nd, 3rd, 4th
support engineers (SE), 1st, 2nd, 3rd, 4th, 5th, 6th
systems
configuration, 1st
installation, 1st
terminals, 1st
users
interpersonal skills, 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th
relationship with, 1st, 2nd, 3rd, 4th
vendor support, 1st
work experience, 1st
working hours, 1st
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