When a Linux system boots, it enters its default runlevel and runs the startup scripts associated with that runlevel. You can also switch between runlevels – for example, there’s a runlevel designed for recovery and maintenance operations.
If you’re a Linux user, you may have seen zombie processes shambling around your processes list. You can’t kill a zombie process because it’s already dead – like an actual zombie.
On Linux, the Root user is equivalent to the Administrator user on Windows. However, while Windows has long had a culture of average users logging in as Administrator, you shouldn’t log in as root on Linux.
Some people think that task killers are important on Android. By closing apps running in the background, you’ll get improved performance and battery life – that’s the idea, anyway. In reality, task killers can reduce your performance and battery life.
The media is full of reports saying Android malware is exploding and that Android users are at risk. Does this mean you should install an antivirus app on your Android phone or tablet?
Geeks often describe programs as being “open source” or “free software.” If you’re wondering exactly what these terms mean and why they matter, read on. (No, “free software” doesn’t just mean that you can download it for free.)
In a world where you can have 3D scenes rendered in real time as your smartphone’s background, plain black wallpapers aren’t the most eye-catching option. However, they can offer battery life improvements over colored wallpapers…on some displays.
If you really want to dig into the Android system, you may find that some apps require root access. Rooting has become less necessary over the years, but it’s still useful if you want to run certain types of apps. Here’s the most widely supported method for rooting your device, and why you might want to.
If you’ve heard anything at all about Linux, you’ve probably heard of Linux distributions – often shortened to “Linux distros.” When deciding to use Linux – on a desktop computer or server – you’ll first need to choose a distro.
Install many third-party .deb packages on Ubuntu – even mainstream, high-quality software like Google Chrome and Skype – and you will see an error saying the package is of bad quality. We will explain what this scary-looking error actually means.
Ubuntu and Linux Mint are two of the most popular desktop Linux distributions at the moment. If you’re looking to take the dive into Linux – or you’ve already used Ubuntu or Mint – you wonder how they’re different.
Believe it or not, there are antivirus programs targeted at desktop Linux users. If you have just switched to Linux and started looking for an antivirus solution, don’t bother – you do not need an antivirus program on Linux.
Is Windows, Linux, Android, or another operating system using a lot of RAM? Don’t panic! Modern operating systems use RAM as a file cache to speed things up. Assuming your computer is performing well, there’s nothing to worry about.
If you’re coming from Windows, the Linux file system structure can seem particularly alien. The C:\ drive and drive letters are gone, replaced by a / and cryptic-sounding directories, most of which have three letter names.
In order to set up an Android device, you have to sign in with a Google account. But you can also add more than one Google account, like a work or second personal account.
You’ve always got a trusty bootable USB flash drive with you to solve computer problems, but what if a PC’s BIOS won’t let you boot from USB? We’ll show you how to make a CD or floppy disk that will let you boot from your USB drive.
Back in Android 4.2, Google hid Developer Options. Since most “normal” users don’t need to access the feature, it leads to less confusion to keep it out of sight. If you need to enable a developer setting, like USB Debugging, you can access the Developer Options menu with a quick trip into the About Phone section of the Settings menu.
Safe mode can help you troubleshoot your Android, but sometimes you’ll need to wipe everything and restore your device to its factory state. But if you can’t perform a normal factory reset–say, if your phone won’t boot properly–you can do it through Android’s recovery environment.
If you have an Android phone or tablet with a small amount of storage, you probably keep uninstalling apps to make room for other ones. But there is a way to expand the storage of an Android device if it has an SD card slot.
Ever want to watch a video on your phone or tablet without wasting its storage space? Or maybe you just need to view a file your friend gave you. Most modern Android devices support standard USB drives, so you can plug in a flash drive just like you would on a computer.
Compared to a PC, phones and tablets are fairly locked-down devices. Jailbreaking, rooting, and unlocking are all ways of bypassing their limitations, and doing things that manufacturers and carriers don’t want you to do.
Use the Nexus Root Toolkit to quickly root your Nexus devices, whether you’ve got a Nexus 7, Galaxy Nexus, or even a Nexus S. Rooting allows you to use powerful apps that don’t work in Android’s default sandbox.
We’ve written about rooting your Android smartphones and tablets before, but why don’t they come rooted? Google argues that rooting is a mistake for security reasons, as it subverts Android’s security model.
To use the Linux terminal like a pro, you’ll need to know the basics of managing files and navigating directories. True to the Unix philosophy, each command does one thing and does it well.
SSH is a lifesaver when you need to remotely manage a computer, but did you know you can also upload and download files, too? Using SSH keys, you can skip having to enter passwords and use this for scripts!