linux shell scripting cookbook second edition

... Introduction to Linux What Linux is? Who developed the Linux? How to get Linux? How to Install Linux Where I can use Linux? What Kernel Is? What is Linux Shell? How to use Shell What is Shell Script ... PM] Next What Linux is? LSST v1.05r3 > Chapter > What Linux is? Linux Shell Scripting Tutorial (LSST) v1.05r3 Chapter 1: Introduction: Quick Introduction to Linux Prev Next What Linux is? ● Free ... the Linux? LSST v1.05r3 > Chapter > Who developed the Linux? Prev Linux Shell Scripting Tutorial (LSST) v1.05r3 Chapter 1: Introduction: Quick Introduction to Linux Next Who developed the Linux?

Ngày tải lên: 05/11/2019, 14:32

... E N T PHP Quick Scripting Reference Second Edition — Mikael Olsson www.allitebooks.com PHP Quick Scripting Reference Second Edition Mikael Olsson www.allitebooks.com PHP Quick Scripting Reference ... fopen('myfile.txt', 'r'); © Mikael Olsson 2016 M Olsson, PHP Quick Scripting Reference, DOI 10.1007/978-1-4842-1922-5_29 121 CHAPTER 29 ■ ERROR HANDLING The second way is to use the error control operator (@) ... displayed if the assertion fails Support for this second parameter was added in PHP 5.4.8 assert(isset($myVar), '$myVar not set'); As of PHP 7, the second parameter can also be an exception object

Ngày tải lên: 08/11/2019, 10:35

... Trang 2Linux Shell ScriptingChapter 1: Quick Introduction to Linux What Linux is? Who developed the Linux? How to get Linux? How to Install Linux Where I can use Linux? What Kernel Is? What is Linux ... Linux Shell? How to use Shell What is Shell Script ? Why to Write Shell Script ? More on Shell Chapter 2: Getting started with Shell Programming How to write shell script Variables in shell ... > What is Linux Shell ? http://www.cyberciti.biz/pdf/lsst/ch01sec07.html (2 of 2) [7/29/2002 6:51:30 PM] Trang 19Linux Shell Scripting Tutorial (LSST) v1.05r3How to use Shell To use shell (You

Ngày tải lên: 16/11/2019, 20:58

... Introduction to Linux What Linux is? Who developed the Linux? How to get Linux? How to Install Linux Where I can use Linux? What Kernel Is? What is Linux Shell? How to use Shell What is Shell Script ... PM] Next What Linux is? LSST v1.05r3 > Chapter > What Linux is? Linux Shell Scripting Tutorial (LSST) v1.05r3 Chapter 1: Introduction: Quick Introduction to Linux Prev Next What Linux is? ● Free ... the Linux? LSST v1.05r3 > Chapter > Who developed the Linux? Prev Linux Shell Scripting Tutorial (LSST) v1.05r3 Chapter 1: Introduction: Quick Introduction to Linux Next Who developed the Linux?

Ngày tải lên: 17/11/2019, 07:35

... partition, but don’t do it when the partition is mounted! mke2fs Linux hackers will be familiar with this program, which creates a Linux second extended filesystem on a partition And you might need ... here’s how to possibly recover your system: First, boot Linux from your Red Hat Linux boot disk Next, at the boot: prompt, type boot: second disk, called “Supplemental Disk.” A bar graph will ... Unleashed: System Administrator’s Edition. For loads of tips on maintaining your system, and background information about different Linux filesystems, see Lars Wirzenius’s Linux System Administrators’

Ngày tải lên: 13/08/2014, 02:22

... or FTP For a shell to bevalid, it must be listed in the /etc/shells file If you decide to install a new shell, be sure to addit to your /etc/shells listing so that people using that shell can connect ... account, an additional check is performed toensure that the user has a valid shell If the user doesn’t have a valid shell, he or she is deniedaccess into the system This check is useful if you ... as you may love Linux, you have to deal with the reality that you must contend withother operating systems out there Even worse, many of them aren’t even UNIX based Al-though the Linux community

Ngày tải lên: 13/08/2014, 02:22

... System /dev/hda1 1 245 376 1 245 376 244 375 1060 122 944 660 24 345 240 83 82 83 Linux native Linux swap Linux native /dev/hda2 /dev/hda3 In this case, there... /dev/fd1 /mnt/floppy # ls ... sources. Just remember the shell script xmkmf, and you should be okay. TIP xmkmf is an abbreviation for X Make Makefile. X Window C HAPTER 10 189 10 X WINDOW CAUTION The xmkmf shell script actually ... other documents on Linux. Configuring Other Servers P ART II 192 Hardware Connectivity and Devices P ART III IN THIS PART ■ Filesystems, Disks, and Other Devices 195 ■ Printing with Linux 229 ■ TCP/IP

Ngày tải lên: 13/08/2014, 02:22

... serial number 10800 ; refresh rate in seconds (3 hours) 1800 ; retry in seconds (30 minutes) 1209600 ; expire in seconds (2 weeks) 604800 ) ; minimum in seconds (1 week) The first line begins ... the retry rate in seconds If the secondary server tries to contact the primary DNS server to check for updates but cannot contact it, the secondary server tries again after retry seconds Trang 6The ... done that day (This allows for multiple revisions in one day.) The second value is the refresh rate in seconds This value tells the secondary DNS servers how often they should query the primary server

Ngày tải lên: 13/08/2014, 02:22

... community The Linux Documentation Project (http://sunsite.unc.edu/LDP/linux.html) has a tremen-dous number of links providing everything from general Linux information, to Linux user groups, to Linux ... 8 20:02:37 shell last message repeated 15 times Aug 8 20:04:23 shell inetd[319]: /usr/sbin/nmbd: exit status 0x1 Aug 8 20:05:21 shell last message repeated 11 times Aug 8 20:13:39 shell sendmail[577]: ... about: Aug 8 19:51:53 shell sendmail[333]: gethostbyaddr(268.266.81.253) failed: 1 Aug 8 19:51:53 shell sendmail[333]: gethostbyaddr(268.266.81.254) failed: 1 Aug 8 19:52:56 shell mountd[324]: ➥Unauthorized

Ngày tải lên: 13/08/2014, 02:22

... can do so with a shell program or shell script A shell program is a series of Linux commands and utilities that have been put into a file using a text editor When you execute a shell program, each ... and executed by Linux, one after the other You can write shell programs and execute them like any other command under Linux You canalso execute other shell programs from within a shell program ... is common practice for all shell scripting A second way to execute myenv under a particular shell, such as pdksh, is as follows: pdksh myenv This invokes a new pdksh shell and passes the filename

Ngày tải lên: 13/08/2014, 02:22

... is that the pattern is done when the second condition is true The second gawk command only shows the B because C is less than or equal to D (making the second condition true) The third gawk ... is contained within single quotes (‘) to prevent the shell from interpret- ing its contents. This is a requirement of the operating system or shell, not the awk language. NF is a predefined variable ... one that is greater than D (making the second condition true) 554 Automation, Programming, and Modifying Source Code PART VI The first field is $1, the second is $2,... save data That is done

Ngày tải lên: 13/08/2014, 02:22

... in the Bourne Again Shell ( bsh). The syntax used for the command is bind <key sequence> <command> Top 50 Linux Commands and Utilities A PPENDIX B 615 B TOP 50 LINUX COMMANDS AND ... group, are 4. Therefore, the command would be chmod 644 test1. Top 50 Linux Commands and Utilities A PPENDIX B 617 B TOP 50 LINUX COMMANDS AND UTILITIES The format for the command, using either ... HOME=/home2/dpitts SHELL=/bin/bash LS_OPTIONS= 8bit color=tty -F -b -T 0 PS1=\h:\w\$ PS2=> MANPATH=/usr/local/man:/usr/man/preformat:/usr/man:/usr/lib/perl5/man LESS=-MM OSTYPE=Linux SHLVL=1 fc

Ngày tải lên: 13/08/2014, 02:22

... Trang 1Automating Linux and Unix System AdministrationSecond Edition Nate Campi and Kirk Bauer Trang 2Automating Linux and Unix System Administration, Second EditionCopyright © 2009 by ... the Basic Tools 375 The Bash Shell 375 Compatibility Issues with Bash 376 Creating Simple Bash Shell Scripts 376 Debugging Bash Scripts 377 Other Shells 378 Bash Resources ... configuration for a new, automated UNIX/Linux environment A “master” cfengine host is set up, with all the required configuration files to manage new Red Hat Linux, Debian Linux, and Solaris hosts This

Ngày tải lên: 13/08/2014, 04:21

... ood)]cajp is simple You start your command shell or your X session using the agent Once logged in, you can run ood)]cajp^]od and you will have a new shell running through the agent Or, if you ... ssh- agent You can also use ood)]cajp without starting a new process In the Bash shell (or any POSIX- compliant shell) you can, for example, start ood)]cajp like this: ar]h\ood)]cajp\ Trang ... host to nect to a third host, you are using the SSH client configuration of the second host, not the first host That second host might have been configured to forward ood)]cajp connections anywhere—including

Ngày tải lên: 13/08/2014, 04:21

... Debian GNU/Linux distribution and a collection of shell and Perl scripts for the installation process Changes to the configuration files of the operating system can be made by cfengine, shell, Perl, ... it Here’s our version for our new environment, explained section by section We assume basic shell-scripting expertise on the part of the reader and focus on the intent of the script instead of ... files are updated on Linux, the cron program will notice the file update and reread the files automatically: Based on this behavior, we never actually anything with the class on Linux The cron daemon

Ngày tải lên: 13/08/2014, 04:21

... have to write multiple behao stanzas When the entry is duplicated with a small change made for the second class of systems, you face a greater risk of mak- ing errors when both entries have to be ... odahh_kii]j`o section on a regular basis but you can get more information from DNS and BIND, Fifth Edition฀ ฀ ฀ ฀ ฀Paul Albitz (O’Reilly Media Inc., 2006), and the Wikipedia entry at dppl6++aj*segela`e]*knc+sege+@ki]ej[J]ia[Ouopai ... was installed via FAI as our internal DNS server Once it’s working there, we can easily deploy a second system just like it using FAI and cfengine First, we need to install the ^ej`5 package, as

Ngày tải lên: 13/08/2014, 04:21

... command to the same line as the find command Experimenting with shell scripts is one of the best ways to increase your shell- scripting knowledge The contents of LNK@+nalh+]`iej)o_nelpo+ are ... PDNAODKH@)pulabxt]nco_]p `kjaxi]eh)o_bkqplqponalknpbknh]op PDNAODKH@iejqpao NA?ELEAJPO This shell script simply looks for any new files created in the centralized _bkqplqpo command using the ... LNK@+ejlqpo+_kjpnkh+_b*_kjpnkh[_b]cajp[_kjb฀ ฀ ฀ ฀ ฀ ฀ ฀ ฀]_pekjoamqaj_a: Trang 8USING RED HAT AS THE AGGREGATOR HOSTIf you run Red Hat Linux on the host where you’d like to aggregate your kqplqpo directories, you need to be aware of

Ngày tải lên: 13/08/2014, 04:21

... established that managing the contents and permission of files is the core of UNIX/Linux system administration UNIX/Linux security is also almost entirely concerned with file contents and permissions ... installed yet This means that if you correct a security problem on your Linux systems through cfengine, and then later install a new Linux sys- Trang 15C H A P T E R 1 2 ฀ I M P R O V I N G S Y S T ... or script tries to execute a login shell this way, it won’t function in our environment Such start-up scripts don’t require us to give the account a working shell, we can simply modify the script

Ngày tải lên: 13/08/2014, 04:21

... your systems, you can write a cfengine module to set your custom classes We will use Bourne shell scripting for our example module Trang 13A P P E N D I X B ฀ W R I T I N G C F E N G I N E M ... P P E N D I X cor-A ฀ I N T R O D U C I N G T H E B A S I C T O O L S 391Isolating Data Within shell scripts, using oa` to isolate certain portions of strings is common If, for example, you want ... the lines that are matched: Now, you have isolated the system’s IP address If you were writing a shell script, you would want to store that value in an environment variable: EL[=@@N9\eb_kjbecapd,xoa`)j#o+*&ejap]``n6X$WZY&X%*&+X-+l#\

Ngày tải lên: 13/08/2014, 04:21

... user management using scripting, sending messages to users, bulk image resizing, accessing MySQL databases from shell, and so on. www.it-ebooks.info Linux Shell Scripting Cookbook Copyright © ... terminal. www.it-ebooks.info Shell Something Out 8 In this book we are dealing with Bash (Bourne Again Shell) , which is the default shell environment for most GNU /Linux systems. Since GNU /Linux is the most ... most privileged user in a Linux system. A shell script is a text le that typically begins with a shebang, as follows: #!/bin/bash For any scripting language in a Linux environment, a script...

Ngày tải lên: 21/02/2014, 19:20