Automating Linux and Unix System Administration Second Edition phần 1 potx

... retrieval system, without the prior written permission of the copyright owner and the publisher.ISBN -13 (pbk): 978 -1- 4302 -10 59-7ISBN -13 (electronic): 978 -1- 4302 -10 60-3Printed and bound in ... tasks that you might never have considered automating. Automating Linux and Unix System Administration Second Edition Nate Campi and Kirk BauerINTRODUCTIONxxivDownloading the CodeThe ... Automating Linux and Unix System Administration, Second Edition Copyright © 2009 by Nate Campi, Kirk BauerAll rights reserved....

... ฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀behao6+^ej+ikqjpik`a9 011 1ksjan9nkkpcnkql9nkkp]_pekj9bet]hh_da_goqi9i `1 On many systems, the +^ej+ikqjp program has the setuid bit set and is owned by the nkkp user. This allows ... with Perl as standard software. However, most administrators find that adding Perl to all of their UNIX systems is well worth the effort, and it comes preinstalled on all major Linux distributions. ... very popular in the system administration community and may very well be the most popular scripting language in use today. The major disadvantage is that some com-mercial UNIX variants may not...

... 12 0 12 1install client, customizing, 11 4 12 0network booting, configuring, 11 2 11 3packages, installing and configuring, 11 0 11 2steps to set up, 10 9JumpStartinstall server, setting up, 12 3 12 4profile ... 342–346description of, 10 9host, installing, 12 0 12 1install client, customizing, 11 4 12 0network booting, configuring, 11 2 11 3packages, installing and configuring, 11 0 11 2steps to set up, 10 9failure ... installation systemsbenefits of, 10 7example environment, 10 8FAI for Debianhost, installing, 12 0 12 1install client, customizing, 11 4 12 0network booting, configuring, 11 2 11 3packages, installing and...

... 20.55,0/2/,,)+'^qbbano+_]_da6 12 .323,/24Os]l6 1- 0,3.- ,11 2 1, /1- 2Finally, the o_l command allows you to copy files between hosts using the SSH proto-col. The syntax resembles the standard _l command, ... t42[20hejqt[t42[20hejqt[.[2[-4 [1[ ]i`20 Hostname: _]ilej[japbkkbkk[_]ilej[jap IP Address: elr0[-5.elr0[-5.[-24-5.[-24[--5.[-24[-[-Date/Time: Sa`jao`]uUn.,,4Dn,,Dn,,[M0FqjaIej 11[ ,,Iej13@]u .1 Every system ... each system by logging in and manually run-ning the _b]cajp command. Cfengine follows a good theory in system- administration automation: the more ways you can initiate changes to a system, ...

... +onr+b]e+_kjbec+l]_g]ca[_kjbec+SA>:L=?G=CAO]lpepq`a]l]_da.)qpeho]l]_da.*.)_kiikj]l]_da.)ili)lnabknghe^]ln-he^atl]p-he^lm0CHAPTER 6 ฀ SETTING UP AUTOMATED INSTALLATION 11 3oq^jap-5.*-24*-*,japi]og .11 * .11 * .11 *,wklpekjnkqpano-5.*-24*-*-7klpekj`ki]ej)j]ia_]ilej*jap7klpekj`ki]ej)j]ia)oanrano-5.*-24*-*-7klpekjpeia)oanrano-5.*-24*-*.057klpekjjpl)oanrano-5.*-24*-*.057klpekjpbpl)oanran)j]iackh`i]opan*_]ilej*jap7oanran)j]iackh`i]opan7jatp)oanran-5.*-24*-*.057behaj]iab]e+ltahejqt*,7ydkopap_dh]ilwd]n`s]naapdanjap,,6,_6.56 .16 a]6_37beta`)]``naooap_dh]il7yOne ... master, system upgrade, and patching procedures is easy before the systems and procedures are put into use. Once you’ve been deploying and updating systems using automated means, reorganizing and ... odahh_kii]j`o6]hh66+qon+^ej+n`]pa)ojpl-peiakqp9/,na`d]p*Dn,.[M-66+qon+hk_]h+o^ej+hkc[l]_g]cao^]_gcnkqj`9pnqaOn all systems, the n`]pa command is executed to synchronize the system s clock. Cfengine terminates this command in 30 seconds if it has not completed. On systems running Red Hat Linux, a...

... directly from our exam-ple systems):@D?LI=?=@@N6,,,0 31 30=.0/@D?L***+?HEAJPEL6-5.*-24*-* I=OG6 .11 * .11 * .11 *,@D?LEL6-5.*-24*-* .1, C=PAS=UEL6-5.*-24*-* .10 LTAHEJQT/*/-$@a^e]j(.,,3),/),5%?klunecdp$?%-550)., ,1 D*Lapan=jrejQJ@E`]p]oaciajp]p6,,,5@30,QJ@E`]p]oaciajpoeva6/.40QJ@E_k`aoaciajp]p6,,,5,,,,QJ@E_k`aoaciajpoeva6.0?,LTAajpnulkejpbkqj`$sadkla%]p5@306,,B2IuEl]``naoooaaiopk^a?,=4,-?,-5.*-24*-* ... 6-5.*-24*-* .1, 6-5.*-24*-* .10 6 .11 * .11 * .11 *,฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀฀taken from the FAI Guide):CHAPTER 6 ฀ SETTING UP AUTOMATED INSTALLATION 13 0oapql_bajcejagau_bgau^kkpopn]l_bajcejasepd]^]oe_ql`]pa*_kjb]j`_b]cajp*_kjb$bknokiana]okjsaoaaipkjaa`^kpd%pd]psehhcappda_qnnajp_kjbecobnkipda_bajcejai]opan*W)`+r]n+_bajceja+ejlqpoYxxig`en)l+r]n+_bajceja+ejlqpoThis ... contents:ouopai[hk_]ha9aj[QOpaniej]h9rp-,,j]ia[oanre_a9@JOw`ki]ej[j]ia9_]ilej*japj]ia[oanran9-5.*-24*-*-oa]n_d9_]ilej*jap(dkia*_]ilej*japyjapskng[ejpanb]_a9LNEI=NUw`ab]qhp[nkqpa9-5.*-24*-*-japi]og9 .11 * .11 * .11 *,lnkpk_kh[elr29jkyoa_qnepu[lkhe_u9JKJApeiavkja9QO+L]_ebe_peiaoanran9hk_]hdkopjbo0[`ki]ej9_]ilej*japnkkp[l]ooskn`9BKKme0o>=N^]vSYSIDCFG AND...

... 3*,*,*-naopne_p66-]hhkspdahk_]hoq^jappkmqanuqonaopne_p-5.*-24*-*,i]og .11 * .11 * .11 *,jkik`ebujkpn]lBoth Red Hat and Debian have a dedicated user to run the NTP daemon process. The user account, ... this, indicating success:Fqh.3-46 ,16 /,]qnkn]jpl`]paW551Y6WE@ 11 4. 31 `]aikj*jkpe_aY]`fqoppeiaoanran-5.*-24*-*.05kbboap,*,, 413 4oa_Red Hat and Debian NTP ClientWe use the same NTP ... RFC1 918 . The file has these contents:CHAPTER 7 ฀ AUTOMATING A NEW SYSTEM INFRASTRUCTURE 19 7Using Scripts to Create User Accounts You shouldn’t ever create user accounts manually by hand-...

... LNK@+ejlqpo+_h]ooao+_b*i]ej[_h]ooao, and all the appropriate tasks will execute on the host and bring it up to date with our Apache configuration and web content.CHAPTER 7 ฀ AUTOMATING A NEW SYSTEM INFRASTRUCTURE 211 odahh_kii]j`o6na^qeh`[renpq]h[i]l66+qon+o^ej+lkopi]l+ap_+lkopbet+renpq]h7+qon+o^ej+lkopbetnahk]`peiakqp92,ejbkni9pnqaNow ... Managing NFS and NIS, Second Edition by Hal Stern, Mike Eisler, and Ricardo Labiaga (O’Reilly Media Inc., 20 01) .The biggest disadvantage of NFS is that it relies on the network and a single ... applications and data from mul-tiple systems. You can modify the files on any system, and the changes become instantly available on all other systems.Problems with network filesystems begin...

... has bugs; and all manner of issues crop up that cause hosts and applications to fail. System and service monitoring is automation’s com-panion tool, used to notify us when systems and applications ... chapter, and we believe that our choices will scale with your environment as it grows.฀have chosen Nagios for our system and service monitoring system. Nagios is flex-ible and mature, and help ... schedule plug-ins and handle notifications, plug-ins to perform host and service checks, NRPE to run plug-ins on remote hosts, and the Nagios CGI web interface to display status and to interact...

... Ganglia web system needs some additional packages. To install them at initial system installation time, we added the packages nn`pkkh and he^ljc ), CHAPTER 10 ฀ MONITORING 311 `abejaoanre_awqoacajane_)oanre_adkopcnkql[j]ia_]ilej)sa^)oanranooanre_a[`ao_nelpekjDPPL_da_g_da_g[_kii]j`_da_g[dpply฀฀฀_da_g[dpplo ... COURSEMost system administrators are familiar with the `ebb and l]p_d commands. The `ebb command is used to compare text files line by line and show the differences. The l]p_d command takes a ... revision and repository path of the source files.If merging is entirely new to you and you’re still struggling to understand the concepts, you’re not alone. Revision control system tools and concepts...