Linux System Administration Recipes A Problem-Solution Approach

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■ INDEXlimiting over ssh, 138—140rapid restore with, 104—108using with SSH keys, 108—110RT (Request Tracker) ticketing systembasic configuration, 235installing, 234overview, 234rights system, 238—239scrips, 239—240secure setup for, creating, 241—243setting up, 235—237tickets, creating via e-mail, 240—241■SSatisfy Any/Satisfy All directives, 168scalpel, 116schemas (LDAP), 28scrips (RT), 239—240scriptsadding new users to LDAP with, 49—52LDAP, modifying/deleting entries with, 52—55querying LDAP with, 55—57setting display style of, 7testing, 9—10searching for strings, 193securitymonitoring for break-ins with chkrootkit,152—154password policy. See password policysecure setup for RT, 241—243securing web sites via Apache withKerberos, 169—170securing web sites with htaccess, 167—168sed stream editor (text)appending/inserting/changing lines, 190—191deleting lines with, 187—188editing within lines, 188—189overview, 187sed regexp syntax, 189self-signed certificates, 29—30ServerAliveInterval, 140—141services/hostgroups, using in Nagios, 68—69shell script wrapper, running strace in, 221showkey utility, 204site manifest, setting up (Puppet), 81—83slave LDAP server, 42—46snapshot filesystems, 130sorter script, 117SourceForge, 19Springnote application, 3SSHbrute-force attacks, stopping with iptables,151—152connections, transferring files over, 142—143IdentityFile option, 141—142Kerberizing setup of, 143—144Kerberos SSH and logon, 26—28limiting rsync over, 138—140setting options on, 140—141ssh -X, remote login with, 208—209ssh-add, 135ssh-agent, 135, 137—138ssh-xfer, 142—143SSH keysmanaging with keychain, 137—138using and limiting, 135—136using with rsync, 108—110SSL certificates, setting up for Apache2, 162—164static linking, 219strace, examining system calls with, 218—221strings, searching for, 193striping (RAID arrays), 128—129subroutines, defining, 111subscribe dependency (Puppet), 83Subversionadding multiple files to, 11—12aliases, version control with, 10—11branching repositories, 15—16dividing repositories, 14—15excluding files with, 13log messages, adding labels to, 11merging repositories, 16sudolimiting usage of, 148—149password usage options, 149—150svn mkdir command, 16svnadmin load command, 16SWITCH statements, Perl and, 252synchronizing root setup, 78—79syntax notes (Perl), 251—252sysadmin work. See also bug fixinglarge projects, executing, 243—244managing interruptions, 231—232RT ticketing system. See RT (RequestTracker) ticketing systemtips for serving co-workers, 244—245tracking work and problems, 233258Download at WoweBook.Com
■ INDEXsyslogcentralized logging with, 226syslogd, logging with, 223—228syslog-ng, 226system calls, examining with strace, 218—221■Ttab-completionfunction, 176, 177tactical overview, Nagios, 65—66tail -f /var/log/messages, 225tarred files, 186TCPKeepAlive, 141teddy bear programming, 214templatesin Puppet, 88—91using in Nagios, 67—68terminal emulators, 196testingbaselines tests, creating, 16—18good testing practices, 16—18LDAP authentication, 34scripts, 9—10text filescompressed, 186for documentation, 3printing readable, 207—208text in filesawk text-processing language, 191—193less text pager, 185—187manipulating file contents with Perl, 193—195readable text from binary files, 200—201sed stream editor. See sed stream editor(text)text encodings, 195—196. See also UTF-8characterszless, 186The Practice of Programming, 214ticket-granting ticket (TGT), 21—22tickets (RT)creating via e-mail, 240—241life cycle of, 236—237Time Management for Sysadmins (O'Reilly), 233time management (sysadmin), 232TLS/SSL config information, 32Tomboy software, 3troubleshootinggdm remote login, 209—210Kerberos replication setup, 48—49Kerberos SSH and logon, 28LDAP authentication, 35LDAP client setup, 39—40looking for existing solutions, 18—19slave LDAP server setup, 45—46SSL certificates, 166—167tune2fs command, labeling disks with, 122Turnbull, James, 63, 83types, searching files by (find command), 179■Uunafs utility, 147Unicode characters, encoding, 196unshadow tool, 147updatedb (sudo), 179users and groups type, 84UTF-8 charactersentering in Vim, 199—200entering in X11, 196—199UTF-8 / UTF-16 / UTF-32, 195—196UUID (universal unique identifier) notation,121—122■Vvariablesin Perl, 7—9in Puppet, 90—91version controladding labels to Subversion log messages,11adding multiple files to Subversion, 11—12excluding files with Subversion, 13with Subversion aliases, 10—11vi editing mode (bash), 171Vimentering UTF-8 characters in, 199—200vimdiff, 218VirtualHost settings (Apache), 160VNC (Virtual Network Computing), 210—211■Wweb sites, for downloadingautopsy/sleuthkit, 116DBAN, 118Debian New Maintainer's Guide, 248/etc/bash_completion, 177Freshmeat, 19httrack website-mirroring tool, 100Knoppix, 113259Download at WoweBook.Com
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Contents■About the Author .......
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■ CONTENTS3-7. Writing a Nagios P
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■ CONTENTS■Chapter 8: Using the
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■ CONTENTSAbout the Author■Juli
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■ CONTENTSAcknowledgmentsMany tha
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■ CONTENTSIntroductionThis book i
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■ INTRODUCTIONDownloading the Cod
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C H A P T E R 1■ ■ ■Saving Yo
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CHAPTER 1 ■ SAVING YOURSELF EFFOR
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C H A P T E R 2■ ■ ■Centraliz
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CHAPTER 2 ■ CENTRALIZING YOUR NET
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C H A P T E R 3■ ■ ■Monitorin
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CHAPTER 3 ■ MONITORING AND UPDATI
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C H A P T E R 4■ ■ ■Taking Ba
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CHAPTER 4 ■ TAKING BACKUPS AND MA
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C H A P T E R 5■ ■ ■Working w
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CHAPTER 5 ■ WORKING WITH FILESYST
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C H A P T E R 6■ ■ ■Securing
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CHAPTER 6 ■ SECURING YOUR SYSTEMS
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CHAPTER 7 ■ WORKING WITH APACHEOn
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CHAPTER 7 ■ WORKING WITH APACHEdi
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CHAPTER 7 ■ WORKING WITH APACHE4.
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CHAPTER 7 ■ WORKING WITH APACHE
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CHAPTER 7 ■ WORKING WITH APACHEAl
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CHAPTER 7 ■ WORKING WITH APACHE
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C H A P T E R 8■ ■ ■Making Be
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CHAPTER 8 ■ USING THE COMMAND LIN
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CHAPTER 9 ■ WORKING WITH TEXT IN
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C H A P T E R 10■ ■ ■Things G
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CHAPTER 10 ■ THINGS GO IN, THINGS
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Page 233 and 234: C H A P T E R 11■ ■ ■Tracking
Page 235 and 236: CHAPTER 11 ■ TRACKING DOWN BUGSTh
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Page 251 and 252: C H A P T E R 12■ ■ ■Managing
Page 253 and 254: CHAPTER 12 ■ MANAGING TIME AND PE
Page 267 and 268: APPENDIX■ ■ ■Perl TipsSee rec
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Page 275 and 276: ■ INDEXenscript option (printing)
Page 277: ■ INDEX■NNagiosadding hosts to,
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