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https://github.com/LCTT/TranslateProject.git
synced 2025-02-28 01:01:09 +08:00
soooogreen
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Translating by ZTinoZ
|
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7 ways hackers can use Wi-Fi against you
|
||||
================================================================================
|
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|
||||
|
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### 7 ways hackers can use Wi-Fi against you ###
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|
||||
Wi-Fi — oh so convenient, yet oh so dangerous. Here are seven ways you could be giving away your identity through a Wi-Fi connection and what to do instead.
|
||||
|
||||
|
||||
|
||||
### Using free hotspots ###
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||||
|
||||
They seem to be everywhere, and their numbers are expected to [quadruple over the next four years][1]. But many of them are untrustworthy, created just so your login credentials, to email or even more sensitive accounts, can be picked up by hackers using “sniffers” — software that captures any information you submit over the connection. The best defense against sniffing hackers is to use a VPN (virtual private network). A VPN keeps your private data protected because it encrypts what you input.
|
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|
||||
|
||||
|
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### Banking online ###
|
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|
||||
You might think that no one needs to be warned against banking online using free Wi-Fi, but cybersecurity firm Kaspersky Lab says that [more than 100 banks worldwide have lost $900 million][2] from cyberhacking, so it would seem that a lot of people are doing it. If you want to use the free Wi-Fi in a coffee shop because you’re confident it will be legitimate, confirm the exact network name with the barista. It’s pretty easy for [someone else in the shop with a router to set up an open connection][3] with a name that seems like it would be the name of the shop’s Wi-Fi.
|
||||
|
||||
|
||||
|
||||
### Keeping Wi-Fi on all the time ###
|
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|
||||
When your phone’s Wi-Fi is automatically enabled, you can be connected to an unsecure network without even realizing it. Use your phone’s [location-based Wi-Fi feature][4], if it’s available. It will turn off your Wi-Fi when you’re away from your saved networks and will turn back on when you’re within range.
|
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|
||||
|
||||
|
||||
### Not using a firewall ###
|
||||
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A firewall is your first line of defense against malicious intruders. It’s meant to let good traffic through your computer on a network and keep hackers and malware out. You should turn it off only when your antivirus software has its own firewall.
|
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|
||||
|
||||
|
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### Browsing unencrypted websites ###
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Sad to say, [55% of the Web’s top 1 million sites don’t offer encryption][5]. An unencrypted website allows all data transmissions to be viewed by the prying eyes of hackers. Your browser will indicate when a site is secure (you’ll see a gray padlock with Mozilla Firefox, for example, and a green lock icon with Chrome). But even a secure website can’t protect you from sidejackers, who can steal the cookies from a website you visited, whether it’s a valid site or not, through a public network.
|
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|
||||
|
||||
|
||||
### Not updating your security software ###
|
||||
|
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If you want to ensure that your own network is well protected, upgrade the firmware of your router. All you have to do is go to your router’s administration page to check. Normally, you can download the newest firmware right from the manufacturer’s site.
|
||||
|
||||
|
||||
|
||||
### Not securing your home Wi-Fi ###
|
||||
|
||||
Needless to say, it is important to set up a password that is not too easy to guess, and change your connection’s default name. You can also filter your MAC address so your router will recognize only certain devices.
|
||||
|
||||
**Josh Althuser** is an open software advocate, Web architect and tech entrepreneur. Over the past 12 years, he has spent most of his time advocating for open-source software and managing teams and projects, as well as providing enterprise-level consultancy for Web applications and helping bring their products to the market. You may connect with him on [Twitter][6].
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|
||||
--------------------------------------------------------------------------------
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||||
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||||
via: http://www.networkworld.com/article/3003170/mobile-security/7-ways-hackers-can-use-wi-fi-against-you.html
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||||
|
||||
作者：[Josh Althuser][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://twitter.com/JoshAlthuser
|
||||
[1]:http://www.pcworld.com/article/243464/number_of_wifi_hotspots_to_quadruple_by_2015_says_study.html
|
||||
[2]:http://www.nytimes.com/2015/02/15/world/bank-hackers-steal-millions-via-malware.html?hp&action=click&pgtype=Homepage&module=first-column-region%C2%AEion=top-news&WT.nav=top-news&_r=3
|
||||
[3]:http://news.yahoo.com/blogs/upgrade-your-life/banking-online-not-hacked-182159934.html
|
||||
[4]:http://pocketnow.com/2014/10/15/should-you-leave-your-smartphones-wifi-on-or-turn-it-off
|
||||
[5]:http://www.cnet.com/news/chrome-becoming-tool-in-googles-push-for-encrypted-web/
|
||||
[6]:https://twitter.com/JoshAlthuser
|
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@ -1,3 +1,5 @@
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alim0x translating
|
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|
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The history of Android
|
||||
================================================================================
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|
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@ -100,4 +102,4 @@ via: http://arstechnica.com/gadgets/2014/06/building-android-a-40000-word-histor
|
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[2]:http://arstechnica.com/gadgets/2012/07/divine-intervention-googles-nexus-7-is-a-fantastic-200-tablet/
|
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[3]:http://arstechnica.com/gadgets/2013/09/balky-carriers-and-slow-oems-step-aside-google-is-defragging-android/
|
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[a]:http://arstechnica.com/author/ronamadeo
|
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[t]:https://twitter.com/RonAmadeo
|
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[t]:https://twitter.com/RonAmadeo
|
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|
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@ -1,42 +0,0 @@
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Translating by DongShuaike
|
||||
|
||||
Backup (System Restore Point) your Ubuntu/Linux Mint with SystemBack
|
||||
================================================================================
|
||||
System Restore is must have feature for any OS that allows the user to revert their computer's state (including system files, installed applications, and system settings) to that of a previous point in time, which can be used to recover from system malfunctions or other problems.
|
||||
Sometimes installing a program or driver can make your OS go to blank screen. System Restore can return your PC's system files and programs to a time when everything was working fine, potentially preventing hours of troubleshooting headaches. It won't affect your documents, pictures, or other data.
|
||||
Simple system backup and restore application with extra features. [Systemback][1] makes it easy to create backups of system and users configuration files. In case of problems you can easily restore the previous state of the system. There are extra features like system copying, system installation and Live system creation.
|
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|
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Screenshots
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|
||||
|
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|
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**Note**: Using System Restore will not restore documents, music, emails, or personal files of any kind. Depending on your perspective, this is both a positive and negative feature. The bad news is that it won't restore that accidentally deleted file you wish you could get back, though a file recovery program might solve that problem.
|
||||
If no restore point exists on your computer, System Restore has nothing to revert to so the tool won't work for you. If you're trying to recover from a major problem, you'll need to move on to another troubleshooting step.
|
||||
|
||||
>>> Available for Ubuntu 15.10 Wily/16.04/15.04 Vivid/14.04 Trusty/Linux Mint 17.x/other Ubuntu derivatives
|
||||
To install SystemBack Application in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:
|
||||
|
||||
Terminal Commands:
|
||||
|
||||
sudo add-apt-repository ppa:nemh/systemback
|
||||
sudo apt-get update
|
||||
sudo apt-get install systemback
|
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|
||||
That's it
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||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.noobslab.com/2015/11/backup-system-restore-point-your.html
|
||||
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[1]:https://launchpad.net/systemback
|
||||
@ -0,0 +1,83 @@
|
||||
Linux / Unix Desktop Fun: Christmas Tree For Your Terminal
|
||||
================================================================================
|
||||
Let us create Linux or Unix console Christmas tree just for fun and profit. First, you need to install a Perl module called Acme::POE::Tree. It is an animated Christmas tree module. I've tested this on Linux, OS X and Unix-like system.
|
||||
|
||||
### Install Acme::POE::Tree ###
|
||||
|
||||
The easiest way to install any perl module is to use the cpan (Comprehensive Perl Archive Network). Open the terminal application and type the following command to install Acme::POE::Tree:
|
||||
|
||||
## run as root ##
|
||||
perl -MCPAN -e 'install Acme::POE::Tree'
|
||||
|
||||
**Sample outputs:**
|
||||
|
||||
Installing /home/vivek/perl5/man/man3/POE::NFA.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Kernel.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Loop.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Resource.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Filter::Map.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Resource::SIDs.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Loop::IO_Poll.3pm
|
||||
Installing /home/vivek/perl5/man/man3/POE::Pipe::TwoWay.3pm
|
||||
Appending installation info to /home/vivek/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/perllocal.pod
|
||||
RCAPUTO/POE-1.367.tar.gz
|
||||
/usr/bin/make install -- OK
|
||||
RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
||||
Has already been unwrapped into directory /home/vivek/.cpan/build/Acme-POE-Tree-1.022-uhlZUz
|
||||
RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
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Has already been prepared
|
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Running make for R/RC/RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
||||
cp lib/Acme/POE/Tree.pm blib/lib/Acme/POE/Tree.pm
|
||||
Manifying 1 pod document
|
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RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
||||
/usr/bin/make -- OK
|
||||
Running make test
|
||||
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
|
||||
t/01_basic.t .. ok
|
||||
All tests successful.
|
||||
Files=1, Tests=2, 6 wallclock secs ( 0.09 usr 0.03 sys + 0.53 cusr 0.06 csys = 0.71 CPU)
|
||||
Result: PASS
|
||||
RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
||||
Tests succeeded but one dependency not OK (Curses)
|
||||
RCAPUTO/Acme-POE-Tree-1.022.tar.gz
|
||||
[dependencies] -- NA
|
||||
|
||||
### Show Christmas tree in the shell ###
|
||||
|
||||
Simply type the following command:
|
||||
|
||||
perl -MAcme::POE::Tree -e 'Acme::POE::Tree->new()->run()'
|
||||
|
||||
**Sample outputs:**
|
||||
|
||||
|
||||
|
||||
Gif 01: An animated christmas tree in Perl
|
||||
|
||||
### Tree customization ###
|
||||
|
||||
Here is my tree.pl:
|
||||
|
||||
#!/usr/bin/perl
|
||||
|
||||
use Acme::POE::Tree;
|
||||
my $tree = Acme::POE::Tree->new(
|
||||
{
|
||||
star_delay => 1.5, # shimmer star every 1.5 sec
|
||||
light_delay => 2, # twinkle lights every 2 sec
|
||||
run_for => 10, # automatically exit after 10 sec
|
||||
}
|
||||
);
|
||||
$tree->run();
|
||||
|
||||
Now can play with your tree modifying star_delay, run_for, and light_delay. And ,there you have it a a Christmas tree in your shell for fun.
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.cyberciti.biz/open-source/command-line-hacks/linux-unix-desktop-fun-christmas-tree-for-your-terminal/
|
||||
|
||||
作者：Vivek Gite
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
@ -1,16 +1,17 @@
|
||||
bazz2
|
||||
Learn with Linux: Learning Music
|
||||
================================================================================
|
||||
|
||||
|
||||
This article is part of the [Learn with Linux][1] series:
|
||||
[Linux 学习系列][1]的所有文章：
|
||||
|
||||
- [Learn with Linux: Learning to Type][2]
|
||||
- [Learn with Linux: Physics Simulation][3]
|
||||
- [Learn with Linux: Learning Music][4]
|
||||
- [Learn with Linux: Two Geography Apps][5]
|
||||
- [Learn with Linux: Master Your Math with These Linux Apps][6]
|
||||
- [Linux 教学之教你练打字][2]
|
||||
- [Linux 教学之物理模拟][3]
|
||||
- [Linux 教学之教你玩音乐][4]
|
||||
- [Linux 教学之两款地理软件][5]
|
||||
- [Linux 教学之掌握数学][6]
|
||||
|
||||
Linux offers great educational software and many excellent tools to aid students of all grades and ages in learning and practicing a variety of topics, often interactively. The “Learn with Linux” series of articles offers an introduction to a variety of educational apps and software.
|
||||
引言：Linux 提供大量的教学软件和工具，面向各个年级段以及年龄段，提供大量学科的练习实践，其中大多数是可以与用户进行交互的。本“Linux 教学”系列就来介绍一些教学软件。
|
||||
|
||||
Learning music is a great pastime. Training your ears to identify scales and chords and mastering an instrument or your own voice requires lots of practise and could become difficult. Music theory is extensive. There is much to memorize, and to turn it into a “skill” you will need diligence. Linux offers exceptional software to help you along your musical journey. They will not help you become a professional musician instantly but could ease the process of learning, being a great aide and reference point.
|
||||
|
||||
@ -152,4 +153,4 @@ via: https://www.maketecheasier.com/linux-learning-music/
|
||||
[10]:http://sourceforge.net/projects/tete/files/latest/download
|
||||
[11]:http://sourceforge.net/projects/jalmus/files/Jalmus-2.3/
|
||||
[12]:http://tuxguitar.herac.com.ar/
|
||||
[13]:http://www.linuxlinks.com/article/20090517041840856/PianoBooster.html
|
||||
[13]:http://www.linuxlinks.com/article/20090517041840856/PianoBooster.html
|
||||
|
||||
@ -1,108 +0,0 @@
|
||||
[bazz222222]
|
||||
Linux 学习系列之物理模拟
|
||||
================================================================================
|
||||
|
||||
|
||||
[Linux 学习系列][1]的所有文章：
|
||||
|
||||
- [Learn with Linux: Learning to Type][2]
|
||||
- [Learn with Linux: Physics Simulation][3]
|
||||
- [Learn with Linux: Learning Music][4]
|
||||
- [Learn with Linux: Two Geography Apps][5]
|
||||
- [Learn with Linux: Master Your Math with These Linux Apps][6]
|
||||
|
||||
Linux offers great educational software and many excellent tools to aid students of all grades and ages in learning and practicing a variety of topics, often interactively. The “Learn with Linux” series of articles offers an introduction to a variety of educational apps and software.
|
||||
|
||||
Physics is an interesting subject, and arguably the most enjoyable part of any Physics class/lecture are the demonstrations. It is really nice to see physics in action, yet the experiments do not need to be restricted to the classroom. While Linux offers many great tools for scientists to support or conduct experiments, this article will concern a few that would make learning physics easier or more fun.
|
||||
|
||||
### 1. Step ###
|
||||
|
||||
[Step][7] is an interactive physics simulator, part of [KDEEdu, the KDE Education Project][8]. Nobody could better describe what Step does than the people who made it. According to the project webpage, “[Step] works like this: you place some bodies on the scene, add some forces such as gravity or springs, then click “Simulate” and Step shows you how your scene will evolve according to the laws of physics. You can change every property of bodies/forces in your experiment (even during simulation) and see how this will change the outcome of the experiment. With Step, you can not only learn but feel how physics works!”
|
||||
|
||||
While of course it requires Qt and loads of KDE-specific dependencies to work, projects like this (and KDEEdu itself) are part of the reason why KDE is such an awesome environment (if you don’t mind running a heavier desktop, of course).
|
||||
|
||||
Step is in the Debian repositories; to install it on derivatives, simply type
|
||||
|
||||
sudo apt-get install step
|
||||
|
||||
into a terminal. On a KDE system it should have minimal dependencies and install in seconds.
|
||||
|
||||
Step has a simple interface, and it lets you jump right into simulations.
|
||||
|
||||
|
||||
|
||||
You will find all available objects on the left-hand side. You can have different particles, gas, shaped objects, springs, and different forces in action. (1) If you select an object, a short description of it will appear on the right-hand side (2). On the right you will also see an overview of the “world” you have created (the objects it contains) (3), the properties of the currently selected object (4), and the steps you have taken so far (5).
|
||||
|
||||
|
||||
|
||||
Once you have placed all you wanted on the canvas, just press “Simulate,” and watch the events unfold as the objects interact with each other.
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
To get to know Step better you only need to press F1. The KDE Help Center offers a great and detailed Step handbook.
|
||||
|
||||
### 2. Lightspeed ###
|
||||
|
||||
Lightspeed is a simple GTK+ and OpenGL based simulator that is meant to demonstrate the effect of how one might observe a fast moving object. Lightspeed will simulate these effects based on Einstein’s special relativity. According to [their sourceforge page][9] “When an object accelerates to more than a few million meters per second, it begins to appear warped and discolored in strange and unusual ways, and as it approaches the speed of light (299,792,458 m/s) the effects become more and more bizarre. In addition, the manner in which the object is distorted varies drastically with the viewpoint from which it is observed.”
|
||||
|
||||
These effects which come into play at relative velocities are:
|
||||
|
||||
- **The Lorentz contraction** – causes the object to appear shorter
|
||||
- **The Doppler red/blue shift** – alters the hues of color observed
|
||||
- **The headlight effect** – brightens or darkens the object
|
||||
- **Optical aberration** – deforms the object in unusual ways
|
||||
|
||||
Lightspeed is in the Debian repositories; to install it, simply type:
|
||||
|
||||
sudo apt-get install lightspeed
|
||||
|
||||
The user interface is very simple. You get a shape (more can be downloaded from sourceforge) which would move along the x-axis (animation can be started by processing “A” or by selecting it from the object menu).
|
||||
|
||||
|
||||
|
||||
You control the speed of its movement with the right-hand side slider and watch how it deforms.
|
||||
|
||||
|
||||
|
||||
Some simple controls will allow you to add more visual elements
|
||||
|
||||
|
||||
|
||||
The viewing angles can be adjusted by pressing either the left, middle or right button and dragging the mouse or from the Camera menu that also offers some other adjustments like background colour or graphics mode.
|
||||
|
||||
### Notable mention: Physion ###
|
||||
|
||||
Physion looks like an interesting project and a great looking software to simulate physics in a much more colorful and fun way than the above examples would allow. Unfortunately, at the time of writing, the [official website][10] was experiencing problems, and the download page was unavailable.
|
||||
|
||||
Judging from their Youtube videos, Physion must be worth installing once a download line becomes available. Until then we can just enjoy the this video demo.
|
||||
|
||||
注：youtube 视频
|
||||
<iframe frameborder="0" src="//www.youtube.com/embed/P32UHa-3BfU?autoplay=1&autohide=2&border=0&wmode=opaque&enablejsapi=1&controls=0&showinfo=0" id="youtube-iframe"></iframe>
|
||||
|
||||
Do you have another favorite physics simulation/demonstration/learning applications for Linux? Please share with us in the comments below.
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: https://www.maketecheasier.com/linux-physics-simulation/
|
||||
|
||||
作者：[Attila Orosz][a]
|
||||
译者：[译者ID](https://github.com/译者ID)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://www.maketecheasier.com/author/attilaorosz/
|
||||
[1]:https://www.maketecheasier.com/series/learn-with-linux/
|
||||
[2]:https://www.maketecheasier.com/learn-to-type-in-linux/
|
||||
[3]:https://www.maketecheasier.com/linux-physics-simulation/
|
||||
[4]:https://www.maketecheasier.com/linux-learning-music/
|
||||
[5]:https://www.maketecheasier.com/linux-geography-apps/
|
||||
[6]:https://www.maketecheasier.com/learn-linux-maths/
|
||||
[7]:https://edu.kde.org/applications/all/step
|
||||
[8]:https://edu.kde.org/
|
||||
[9]:http://lightspeed.sourceforge.net/
|
||||
[10]:http://www.physion.net/
|
||||
@ -0,0 +1,69 @@
|
||||
黑客利用Wi-Fi侵犯你隐私的七种方法
|
||||
================================================================================
|
||||
|
||||
|
||||
### 黑客利用Wi-Fi侵犯你隐私的七种方法 ###
|
||||
|
||||
Wi-Fi — 既然方便又危险的东西！这里给大家介绍一下通过Wi-Fi连接泄露身份信息的七种方法和预防措施。
|
||||
|
||||
|
||||
|
||||
### 利用免费热点 ###
|
||||
|
||||
它们似乎无处不在，而且它们的数量会在[下一个四年里增加四倍][1]。但是它们当中很多都是不值得信任的，从你的登录凭证、email甚至更加敏感的账户，都能被黑客用一款名叫“sniffers”的软件截获 — 这款软件能截获到任何你通过该连接提交的信息。防止被黑客盯上的最好办法就是使用VPN(virtual private network)，它能保护你的数据隐私它会加密你所输入的信息。
|
||||
|
||||
|
||||
|
||||
### 网上银行 ###
|
||||
|
||||
你可能认为没有人需要自己被提醒不要使用免费Wi-Fi来操作网上银行, 但网络安全厂商卡巴斯基实验室表示[全球超过100家银行因为网络黑客而损失9亿美元][2]，由此可见还是有很多人因此受害。如果你真的想要在一家咖吧里使用免费真实的Wi-Fi，那么你应该向服务员确认网络名称。[在店里用路由器设置一个开放的无线连接][3]并将它的网络名称设置成店名是一件相当简单的事。
|
||||
|
||||
|
||||
|
||||
### 始终开着Wi-Fi开关 ###
|
||||
|
||||
如果你手机的Wi-Fi开关一直开着的，你会自动被连接到一个不安全的网络中去，你甚至都没有意识到。你可以利用你手机的[基于位置的Wi-Fi功能][4]，如果它是可用的，那它会在你离开你所保存的网络范围后自动关闭你的Wi-Fi开关并在你回去之后再次开启。
|
||||
|
||||
|
||||
|
||||
### 不使用防火墙 ###
|
||||
|
||||
防火墙是你的第一道抵御恶意入侵的防线，它能有效地让你的电脑网络通畅并阻挡黑客和恶意软件。你应该时刻开启它除非你的杀毒软件有它自己的防火墙。
|
||||
|
||||
|
||||
|
||||
### 浏览非加密网页 ###
|
||||
|
||||
说起来很难过，[世界上排名前100万个网站中55%是不加密的][5]，一个未加密的网站则会让传输的数据暴露在黑客的眼下。如果一个网页是安全的，你的浏览器则会有标明(比如说火狐浏览器是一把绿色的挂锁、Chrome蓝旗则是个绿色的图标)。但是一个安全的网站不能让你免于被劫持的风险，它能通过公共网络从你访问过的网站上窃取cookies，无论是不是正当网站与否。
|
||||
|
||||
|
||||
|
||||
### 不更新你的安全防护软件 ###
|
||||
|
||||
如果你想要确保你自己的网络是受保护的，就更新的路由器固件。你要做的就是进入你的路由器管理页面去检查，通常你能在厂商的官方网页上下载到最新的固件版本。
|
||||
|
||||
|
||||
|
||||
### 不保护你的家用Wi-Fi ###
|
||||
|
||||
不用说，设置一个复杂的密码和更改无线连接的默认名都是非常重要的。你还可以过滤你的MAC地址来让你的路由器只承认那些确认过的设备。
|
||||
|
||||
**Josh Althuser**是一个开源支持者、网络架构师和科技企业家。在过去12年里，他花了很多时间去倡导使用开源软件来管理团队和项目，同时为网络应用程序提供企业级咨询并帮助它们走向市场。你可以联系[他的推特][6].
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.networkworld.com/article/3003170/mobile-security/7-ways-hackers-can-use-wi-fi-against-you.html
|
||||
|
||||
作者：[Josh Althuser][a]
|
||||
译者：[ZTinoZ](https://github.com/ZTinoZ)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://twitter.com/JoshAlthuser
|
||||
[1]:http://www.pcworld.com/article/243464/number_of_wifi_hotspots_to_quadruple_by_2015_says_study.html
|
||||
[2]:http://www.nytimes.com/2015/02/15/world/bank-hackers-steal-millions-via-malware.html?hp&action=click&pgtype=Homepage&module=first-column-region%C2%AEion=top-news&WT.nav=top-news&_r=3
|
||||
[3]:http://news.yahoo.com/blogs/upgrade-your-life/banking-online-not-hacked-182159934.html
|
||||
[4]:http://pocketnow.com/2014/10/15/should-you-leave-your-smartphones-wifi-on-or-turn-it-off
|
||||
[5]:http://www.cnet.com/news/chrome-becoming-tool-in-googles-push-for-encrypted-web/
|
||||
[6]:https://twitter.com/JoshAlthuser
|
||||
@ -0,0 +1,39 @@
|
||||
# 使用SystemBack备份你的Ubuntu/Linux Mint（系统还原）
|
||||
|
||||
系统还原对于任何一款允许用户还原电脑到之前状态（包括文件系统，安装的应用，以及系统设置）的操作系统来说，都是必备功能，可以处理系统故障以及其他的问题。有的时候安装一个程序或者驱动可能让你的系统黑屏。系统还原则让你电脑里面的系统文件（译者注：是系统文件，并非普通文件，详情请看**注意**部分）和程序恢复到之前工作正常时候的状态，进而让你远离那让人头痛的排障过程了。而且它也不会影响你的文件，照片或者其他数据。简单的系统备份还原工具[Systemback](https://launchpad.net/systemback)让你很容易地创建系统备份以及用户配置文件。如果遇到问题，你可以傻瓜式还原。它还有一些额外的特征包括系统复制，系统安装以及Live系统创建。
|
||||
|
||||
截图
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
**注意**:使用系统还原不会还原你的文件，音乐，电子邮件或者其他任何类型的私人文件。对不同用户来讲，这既是优点又是缺点。坏消息是它不会还原你意外删除的文件，不过你可以通过一个文件恢复程序来解决这个问题。如果你的计算机上没有系统还原点，那么系统还原工具就不会奏效了。（最后一句没有太理解）
|
||||
|
||||
> > >适用于Ubuntu 15.10 Wily/16.04/15.04 Vivid/14.04 Trusty/Linux Mint 14.x/其他Ubuntu衍生版，打开终端，将下面这些命令复制过去：
|
||||
|
||||
终端命令：
|
||||
|
||||
```
|
||||
sudo add-apt-repository ppa:nemh/systemback
|
||||
sudo apt-get update
|
||||
sudo apt-get install systemback
|
||||
|
||||
```
|
||||
|
||||
大功告成。
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: http://www.noobslab.com/2015/11/backup-system-restore-point-your.html
|
||||
|
||||
译者：[DongShuaike](https://github.com/DongShuaike)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[1]:https://launchpad.net/systemback
|
||||
@ -0,0 +1,107 @@
|
||||
Linux 教学之物理模拟
|
||||
================================================================================
|
||||
|
||||
|
||||
[Linux 学习系列][1]的所有文章：
|
||||
|
||||
- [Linux 教学之教你练打字][2]
|
||||
- [Linux 教学之物理模拟][3]
|
||||
- [Linux 教学之教你玩音乐][4]
|
||||
- [Linux 教学之两款地理软件][5]
|
||||
- [Linux 教学之掌握数学][6]
|
||||
|
||||
引言：Linux 提供大量的教学软件和工具，面向各个年级段以及年龄段，提供大量学科的练习实践，其中大多数是可以与用户进行交互的。本“Linux 教学”系列就来介绍一些教学软件。
|
||||
|
||||
物理是一个有趣的课题，证据就是任何物理课程都可以用具体的图片演示给你看。能看到物理变化过程是一个很妙的体验，特别是你不需要到教室就能体验到。Linux 上有很多很好的科学软件来为你提供这种美妙感觉，本篇文章只着重介绍其中几种。
|
||||
|
||||
### 1. Step ###
|
||||
|
||||
[Step][7] 是一个交互型物理模拟器，KDEEdu[8]（KDE 教育）项目的一部分。没人会比它的作者更了解它的作用。在项目官网主页上写着“[Step] 是这样玩的：你放点东西进来，添加一些力（地心引力或者弹簧），然后点击‘模拟’按钮，这款软件就会为你模拟这个物体在真实世界的物理定律影响下的运动状态。你可以改变物体或力的属性（允许在模拟过程中进行修改），然后观察不同属性下产生的现象。Step 可以让你从体验中学习物理！”
|
||||
|
||||
Step 依赖 Qt 以及其他一些 KDE 所依赖的软件，正是由于像 KDEEdu 之类的项目存在，才使得 KDE 变得如此强大，当然，你可能需要忍受由此带来的庞大的桌面系统。
|
||||
|
||||
Debian 的源中包含了 step 软件，终端下运行以下命令安装：
|
||||
|
||||
sudo apt-get install step
|
||||
|
||||
在 KDE 环境下，它只需要很少的依赖，几秒钟就能安装完成。
|
||||
|
||||
Step 有个简单的交互界面，你进去后直接可以进行模拟操作。
|
||||
|
||||
|
||||
|
||||
你会发现所有物品在屏幕左边，包括不同的质点，空气，不同形状的物体，弹簧，以及不同的力（见1区域） 。如果你选中一个物体，屏幕右边会出现简短的描述信息（见2区域），以及你创造的世界的介绍（主要介绍这个世界中包含的物体）（见3区域），以及你当前选中的物体的属性（见4区域），以及你的操作历史（见5区域）。
|
||||
|
||||
|
||||
|
||||
一旦你放好了所有物体，点击下“模拟”按钮，可以看到物体与物体之间的相互作用。
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
想要更多了解 Step，按 F1 键，KDE 帮助中心会打印详细的软件操作手册。
|
||||
|
||||
### 2. Lightspeed ###
|
||||
|
||||
Lightspeed 是一个简单的基于 GTK+ 和 OpenGL 的模拟器，可以模拟一个高速移动的物体被观测到的现象。这个模拟器的理论基础是爱因斯坦的狭义相对论，在 Lightspeed 的 [srouceforge 页面][9]上，他们这样介绍：当一个物体被加速到几千公里每秒，它就会表现得扭曲和褪色；当物体被不断加速到接近光速（299,792,458 m/s）时，这个现象会越来越明显，并且在不同方向观察这个物体的扭曲方式，会得到完全不一样的结果。
|
||||
|
||||
受到相对速度影响的现象如下（LCTT 译注：都可以从“光速不变”理论推导出来）：
|
||||
|
||||
- **洛伦兹收缩** —— 物体看起来变短了
|
||||
- **多普乐红移/蓝移** —— 物体的颜色变了
|
||||
- **前灯效应** —— 物体的明暗变化（LCTT 译注：当物体接近光速移动时，会在它前进的方向强烈地辐射光子，从这个角度看，物体会变得很亮，相反，从物体背后观察，会发现它很暗）
|
||||
- **光行差效应** —— 物体扭曲变形了
|
||||
|
||||
Lightspeed 有 Debian 的源，执行下面的命令来安装：
|
||||
|
||||
sudo apt-get install lightspeed
|
||||
|
||||
用户界面非常简单，里边有一个物体（你可以从 sourceforge 下载更多形状的物体）沿着 x 轴运动（按下 A 键或在菜单栏 object 项目的 Animation 选项设置，物体就会开始运动）。
|
||||
|
||||
|
||||
|
||||
你可以滑动右边的滑动条来控制物体移动的速度。
|
||||
|
||||
|
||||
|
||||
其他一些简单的控制器可以让你获得更多的视觉效果。
|
||||
|
||||
|
||||
|
||||
点击界面并拖动鼠标可以改变物体视角，在 Camera 菜单下可以修改背景颜色或者物体的图形模式，以及其他效果。
|
||||
|
||||
### 特别推荐： Physion ###
|
||||
|
||||
Physion 是个非常有趣并且美观的物理模拟软件，比上面介绍的两款软件都好玩好看。可惜在写本文章的时候它的[官网][10]出现问题了，下载页面无法使用。
|
||||
|
||||
从他们放在 Youtube 上的视频来看，Physion 还是值得我们下载下来玩玩的。在官网恢复之前，我们只能看看演示视频了。
|
||||
|
||||
注：youtube 视频
|
||||
<iframe frameborder="0" src="//www.youtube.com/embed/P32UHa-3BfU?autoplay=1&autohide=2&border=0&wmode=opaque&enablejsapi=1&controls=0&showinfo=0" id="youtube-iframe"></iframe>
|
||||
|
||||
你有其他 Linux 下的好玩的物理模拟、演示、教学软件吗？如果有，请在评论处分享给我们。
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
via: https://www.maketecheasier.com/linux-physics-simulation/
|
||||
|
||||
作者：[Attila Orosz][a]
|
||||
译者：[bazz2](https://github.com/bazz2)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]:https://www.maketecheasier.com/author/attilaorosz/
|
||||
[1]:https://www.maketecheasier.com/series/learn-with-linux/
|
||||
[2]:https://www.maketecheasier.com/learn-to-type-in-linux/
|
||||
[3]:https://www.maketecheasier.com/linux-physics-simulation/
|
||||
[4]:https://www.maketecheasier.com/linux-learning-music/
|
||||
[5]:https://www.maketecheasier.com/linux-geography-apps/
|
||||
[6]:https://www.maketecheasier.com/learn-linux-maths/
|
||||
[7]:https://edu.kde.org/applications/all/step
|
||||
[8]:https://edu.kde.org/
|
||||
[9]:http://lightspeed.sourceforge.net/
|
||||
[10]:http://www.physion.net/
|
||||
Loading…
Reference in New Issue
Block a user