Linux System Administration Recipes A Problem-Solution Approach

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■ INDEXgnuplot, 228—229logging with syslogd, 223—228ltrace and library calls, 221—223plotting log data, 226—229strace for examining system calls, 218—221time saving approach to, 213—215■C$CDPATH, 176centralized logging with syslog, 226centralized monitoring, setting up with Nagios,63—66certificate authority (CA), 29check_command (Nagios), 68check_disk command, 76chkrootkit, monitoring for break-ins with, 152—154clientssetting up LDAP, 38—40setting up Puppet, 80setup (Kerberos), 24—26ClusterSSH (cssh), 91—93command lineApache2, 157—160bash keyword shortcuts and, 171—174find command and, 179—180programmable completion with bash, 176—178writing personalized bash functions, 174—176xargs command, 181—183commandsdefining in Nagios, 71enabling external in Nagios, 76—77LDAP, 40compiling/configuring Apache2 with SSL, 164—167compressed text files, 186console keymap, 203CPANmodules, 19Perl modules from, 247—248cron, 113cron-apt for package updates, 154cronjob, 100custom facts (Puppet), 90custom fields, adding to LDAP, 57—58■Ddatarecovering with fsck and dd, 113—115rescue of with Autopsy/Sleuthkit, 116—118restoring with rsync, 104—108retrieving with Foremost, 116securely wiping with DBAN, 118databasesLDAP authentication, 33—34populating LDAP, 35—38setting up (Kerberos), 24—26DBAN (Darik's Boot And Nuke), 118dd, recovering data with, 113—115ddrescue, 103dead-tree notebook, 1Debianconfiguration setup, 64New Maintainer's Guide, 248defragmentation, online, 134deleting lines of text with sed, 187—188Deploying OpenLDAP (Apress), 87diff for bug tracking, 216—218digraphs, 199directorieslarge, saving space on, 121LDAP, 28disks, labeling with tune2fs command, 122display style, setting (scripting), 7dividing repositories (Subversion), 14—15documentationfollow up documentation with wikis, 2importance of, 1maintaining with bash, 1—2running multiple wikis on same install, 3—6DocumentRoot processing directive (Apache),159dpkg-reconfigure locales, 196DSA keys, 109dynamic linking, 219dynamic shared objects (DSOs), 161■Eecho statements, rsync and, 140editing within lines of text with sed, 188—189emacs-like editing mode (bash), 171e-mailcreating RT tickets via, 240—241off-site backups via, 110—112encodings, text, 195—196254Download at WoweBook.Com
■ INDEXenscript option (printing), 208Esc key, 173exec option (find command ), 180exec type, 84expressions (find command ), 180ext2/ext3 filesystems, 119—120, 130—132ext4 filesystem, 133—134external commands, enabling in Nagios, 76—77■FFacter in Puppet, 88—91facts, custom (Puppet), 90fields, adding custom to LDAP, 57—58filesadding multiple to Subversion, 11—12binary, readable text from, 200—201compressed text files, 186determining frequency of changes to, 99—100excluding with Subversion, 13file.tar.gz, 186manipulating content with Perl, 193—195moving with xargs, 183renaming with xargs, 183tarred, 186transferring over ssh connections, 142—143xargs command and file content, 182filesystemsautomatic fsck checking, making changesto, 120—121ext2 vs. ext3, 130—132ext2/ext3, changing with tune2fs, 119—120ext4, 133—134large, saving space on, 121partitions, resizing on the fly, 123—128RAID arrays in, 128—130rsnapshot, 130—132snapshot, 130UUID notation, 121—122XFS 64-bit journaling filesystem, 134find command, 179—182flapping, defined (hosts/services), 70Foremost, retrieving data with, 116Freshmeat, 19fsckchecking, making changes to, 120—121recovering data with, 113—115■Ggawk (GNU version of awk), 191gddrescue utility, 103gdm (Gnome display manager)gdmsetup utility, 209remote login with, 209—210generic-host template (Nagios), 68Getting Things Done (Penguin), 233GNU readline shortcuts, 171gnuplot, plotting data with, 228—229grep command, 182, 201gunzip, 186gvimdiff, 218■Hhard drives, wiping data with DBAN, 118Heimdal version of Kerberos, 22hex code, 197hostgroups/services, using in Nagios, 67—69htaccess, securing web sites with, 167—168.htpasswd file, 168httpd.conf file, 157httrack website-mirroring tool, 100■I-i option (Perl), 194-ibak filename.txt (sed command), 187IdentityFile option (ssh), 141—142if syntax (awk), 193immutable journal files, 119INFECTED string, 152inserting/appending/changing lines of text(sed), 190—191installingchkrootkit, 152cron-apt, 154Kerberos server, 22—24RT ticketing system, 234iostat -dxk 5, running, 216iptables, stopping ssh brute-force attacks with,151—152ISO-8859-1, 195■JJackiewicz, Tom, 87john-the-ripper password-cracking tool, 147journal files, 119—120, 134255Download 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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Page 233 and 234: C H A P T E R 11■ ■ ■Tracking
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Page 251 and 252: C H A P T E R 12■ ■ ■Managing
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Page 267 and 268: APPENDIX■ ■ ■Perl TipsSee rec
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Page 277 and 278: ■ INDEX■NNagiosadding hosts to,
Page 279 and 280: ■ INDEXsyslogcentralized logging
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