I'm having a hard time running Ubuntu 14.04 on my PC. When I try to download or install anything, the orange bar reaches the halfway and I get this freaking error:

Package operation failed.
The installation or removal of a software package failed.

What's the meaning of this? I really need help. 

I'm currently on Ubuntu 14.04 and I want to install Linux Mint on my system alongside. I have Linux Mint on a USB stick and when I insert the USB into one of the ports and select the first boot device as USB from BIOS, I get the 'Operating System not Found' error. How can I fix this error? What is the cause of this error?

Do you know about the function 'uptime' on Ubuntu? I want to find out the time elapsed after the boot on my Ubuntu OS. I have found the function named 'uptime' but I don't know how to use it. 

Please describe how to use the function and also include how it works.

I really like to play Team Fortress 2. But I have installed Ubuntu 14.04 on my system since I don't have a license of Windows 7. I tried to run TF2 from terminal and I got these errors:

"Compile of "vertexlit_and_unlit_generic_vs20" Failed:" and around 100 similar errors.

How can I fix this error? What may have caused this?

What is the code name of the new Linux 4.0? Can I install Kernel updates without reboot? Is there any improvement on Skylake?Is Intel Quark SoC x86 Platform supported for Kernel 4.0? Describe about F2FS, BtrfFS file systems. What are HID driver tweaks? Is there any improvement Radeon DRM driver? How does Live kernel patching infrastructure work? What is Logitech HID++? Is it supported Kernel 4.0? How does staging driver patch for Linux Kernel 4.0? Thank You

I have installed a new Operating System called Redhart on my HP laptop computer and I would like to know if it is possible to connect a smart phone with a Windows OS to my computer? If yes, what steps do I have to follow to connect my Windows Smartphone or synchronize the phone with my laptop knowing they have different Operating System? Thank you.

I would like to know the meaning of LTS. Many Linux OS are released these days and not every version gets an LTS. I know that it stands for 'Long Term Support' but please help me get questions to the following questions:

What's the time period of LTS?

What are the things kept in mind by developers to release LTS?

Does LTS work for more than 3 years without any problems?

Hello! If I want to make android applications, how can I learn android development? What are the prerequisites for learning android development. Since it is an OS, I am sure there should be strong concepts in various computer science subjects, but what are these subjects? Links and names of all the books to learn android development are needed. Thanks in advance!

Hello! I am switching from Windows 8 to Linux and I have been told that I need a USB or a DVD for that. But why? I mean is there some way I can install Linux without using USB or DVD? I just want to replace Windows 8 with Linux for good.

I have a Wi-Fi adapter but it does not do anything when i connect it to my computer via the USB port. Since I have no internet on my desktop, i cannot install a wireless adapter. This is a netgear wireless adapter and is there a way that i can get it to work on my Ubuntu OS without having another internet connection?