Download E-books RasPi Magazine [UK], Issue 16 (2015) PDF
From the staff in the back of Linux consumer & Developer journal, RasPi is the fundamental advisor to getting the main out of the Raspberry Pi credit-card sized desktop. filled with specialist tutorials on the way to layout, construct and code with the Raspberry Pi, this electronic journal will train and encourage a brand new new release of coders and makers.
Read or Download RasPi Magazine [UK], Issue 16 (2015) PDF
Similar Programming books
Get extra from your legacy structures: extra functionality, performance, reliability, and manageability Is your code effortless to alter? are you able to get approximately instant suggestions in the event you do swap it? Do you recognize it? If the reply to any of those questions isn't any, you've gotten legacy code, and it really is draining money and time clear of your improvement efforts.
Even undesirable code can functionality. but when code isn’t fresh, it may well convey a improvement association to its knees. each year, numerous hours and critical assets are misplaced as a result of poorly written code. however it doesn’t need to be that approach. famous software program specialist Robert C. Martin offers a progressive paradigm with fresh Code: A instruction manual of Agile software program Craftsmanship .
“Kent is a grasp at growing code that communicates good, is straightforward to appreciate, and is a excitement to learn. each bankruptcy of this booklet includes very good causes and insights into the smaller yet vital judgements we regularly need to make whilst growing caliber code and periods. ” –Erich Gamma, IBM exotic Engineer “Many groups have a grasp developer who makes a swift circulate of fine judgements all day lengthy.
Te>Two of the industry’s so much skilled agile checking out practitioners and experts, Lisa Crispin and Janet Gregory, have teamed as much as carry you the definitive solutions to those questions and so on. In Agile trying out, Crispin and Gregory outline agile checking out and illustrate the tester’s position with examples from actual agile groups.
Extra resources for RasPi Magazine [UK], Issue 16 (2015)
For this, the functionality in query is net_io_counters(). without parameter, you'll get the mixture over all the community interfaces. if you would like it divided out, then you definately can go within the parameter pernic=True. The back item has the values of bytes_sent, bytes_recv, packets_sent and packets_recv. if you happen to requested for the implications damaged down via community interface, you will get the record of interfaces with the functionality keys(). you could then pull the consequences for every interface utilizing the keys. Now you'll optimistically have sufficient principles and instruments so as to add a few simple community tracking techniques for your personal code. now we have merely been in a position to hide the fundamentals the following, so don’t be afraid to perform a little research and experimentation to determine what else you are able to do. Nagios This month, we now have checked out a few examples of the way to incorporate community tracking into your personal application code. yet, what in case your fundamental purpose is to do a little severe tracking and also you nonetheless are looking to be capable to use Python? a sensible choice could be nagios. Assuming that you're utilizing Raspbian, you could set up nagios with the command: sudo apt-get set up nagios3 This installs the tracking instruments, besides the internet interface for you to use to manage it. whereas nagios features a huge variety of tracking instruments, you should use Python to jot down your personal plugins and upload extra performance. so that it will accomplish that, additionally, you will have to set up the NRPE server package deal with: “If you're extra attracted to throughput numbers, you will get this information via psutil too. For this, the functionality in query is net_ io_counters()” sudo apt-get set up nagios-nrpe-server you might want to placed your Python scripts within the related listing (/usr/lib/nagios/plugins) because the approach plugins. This easily makes conﬁguration a lot more straightforward. to be able to set off signals inside nagios, it is very important set an go out code with sys. exit(), the place the prospective values are: go out Code zero 1 2 three prestige okay caution serious UNKNOWN after you have your script written, you must deﬁne it as a command within the ﬁle ‘/etc/nagios/nrpe. cfg’, the place you provide it a command identify and aspect it to the site at the ﬁle process. so as to add this new command to the tests, it is very important upload a ‘deﬁne’ part to the ﬁle ‘/stc/nagios/ objects/commands. cfg’. “Once you've got your script written, you want to deﬁne it as a command within the ﬁle ‘/etc/ nagios/nrpe. cfg’, the place you supply it a command identify and aspect it to the site at the ﬁle process” The Code community tracking # step one is to import the socket module import socket # # # # s you wish a socket item to paintings with the 1st parameter is the deal with kinfolk the second one parameter set the socket style to uncooked The 3rd parameter units the protocol to TCP = socket. socket(socket. AF_INET, socket. SOCK_RAW, socket. IPPROTO_TCP) The Code community tracking # The interface should be in promiscuous mode. # for those who forgot, you should use the subsequent code import os os. system(“ifconfig eth0 promisc”) # that allows you to see the skin global, you wish # to bind this socket to a actual interface s.