Get Automating System Administration with Perl: Tools to Make PDF

By David N. Blank-Edelman

Should you do structures management paintings of any variety, you want to care for the turning out to be complexity of your setting and extending calls for in your time. Automating procedure management with Perl, moment version, not just provides you with the ideal instruments to your task, but additionally indicates easy methods to technique particular difficulties and to soundly automate routine projects. up-to-date and multiplied to hide the most recent working platforms, applied sciences, and Perl modules, this variation of the "Otter Book" can help you: * deal with person debts

* visual display unit filesystems and tactics

* paintings with configuration documents in very important codecs corresponding to XML and YAML

* Administer databases, together with MySQL, MS-SQL, and Oracle with DBI

* paintings with listing providers like LDAP and energetic listing

* Script e-mail protocols and unsolicited mail regulate

* successfully create, deal with, and examine log records Administer community identify and configuration prone, together with NIS, DNS and DHCP

* hold, visual display unit, and map community providers, utilizing applied sciences and instruments resembling SNMP, nmap, libpcap, GraphViz and RRDtool
* increase filesystem, method, and community defense

This variation contains extra appendixes to get you up to the mark on applied sciences corresponding to XML/XPath, LDAP, SNMP, and SQL. With this publication in hand and Perl on your toolbox, you are able to do extra with less--fewer assets, much less attempt, and much much less hassle.

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If we wanted to display the files with this condition, we could check $@. Here is another real-life example of how useful even simple code can be. ” It then suggested locating this file by copying each folder to a new location, comparing the number of files in the copy to the original, and then, if the copied folder has fewer files, identifying which file(s) in the original folder did not get copied to the new location. This seemed like a ridiculous suggestion given the number of folders on my NT partition and the amount of time it would take.

Different vendors have extended their filesystem implementations in different ways: some filesystems support POSIX access control lists (ACLs) for better security, some support journaling for better recovery, others include the ability to set special file-based attributes, and so on. We’ll be writing code aimed at the lowest common denominator to allow it to work across different Unix platforms. The top, or root, of a Unix filesystem is indicated by a forward slash (/). To uniquely identify a file or directory in a Unix filesystem, we construct a path starting with a slash and then add directories, separating them with forward slashes, as we descend deeper into the filesystem.

If you would prefer not to have to write your code using an object-oriented syntax, the module File::Spec::Functions provides a more direct route to the methods found in File::Spec. , the name catfile() makes sense only if you know enough Unix to understand that the cat command is used to concatenate parts of its input together), there’s a much nicer wrapper by Ken Williams called Path::Class. It doesn’t ship with Perl like File::Spec does, but it is probably worth the extra installation step. Here’s how it works.

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Automating System Administration with Perl: Tools to Make You More Efficient by David N. Blank-Edelman

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