Luis Alvarado's questions

I was reading the new changes with Ubuntu 17.04 and one caught my eye which was moving from the typical swap partition model to a new swap file model for new installs.

Are there benefits for using this as opposed to a swap partition, maybe related to or in terms of performance, space saving, more in line with today's hardware like SSD and NVMe or something else?

Another related question is how can I migrate from a swap partition to a swap file? I'm guessing using dd but want to confirm since I did not know about the swap file scheme until now.

And lastly, will hibernation be an issue with swap files?

Of course these questions might be related to cases where the user has a lot of RAM and the swap is rarely used (I'm guessing). So just to confirm that this information will help me and others with the same doubts.

I have been getting this question lately from students and although I have a lot of information to offer, I have not found a source that I can point people to where they can read an update answer (I have found a lot of misinformation and obsolete information). So, some of the questions I have for package formats like snap, appimage, flatpak and others in this evolution of universal packaging systems are:

• Who created the package format?
• What features does it offer?
• What features are unique to it? (That the others do not yet have)
• Who supports it?
• What Distributions use it?
• What focus does the package have? (For Desktop, Clouds, Mobile, etc..)
• Which are more actively developed?

I just saw the video about Chromecast and I am interested in knowing how can I enable this on my Ubuntu PC. My TV has an HDMI port.

I am looking for a step by step instruction to guide me in the ways of installing, configuring and debugging many of the issues new users have when dealing with Wine in Ubuntu.

What is the recommended way of installing Wine, some of the key issues that it has and how to solve them?

If I have a specific problem with an App in Wine, how do I go about solving it? What are the recommended steps to ensure that I can fix a problem related to an app I wish to use?

I want to disable the way the microphone lowers itself depending on the input. Here is an image:

The microphone started at 100% and slowly started to drop to where the image is showing. This is because of either a background noise or the user raising their voice. In any case, I would like to prohibit this behavior because when it gets too low, the need to raise the voice will be actually needed.

So is there an option or configuration file where one can edit and change this behavior?

This is not related to only one app but several, ranging from Skype to Google Hangouts, Empathy to Teamspeak and more. So please no answers mentioning only one app if the solution does not solve the problem for others.

the pulseaudio app (gui and terminal) was already used. Alsamixer was also used. In both cases, adjusting the microphone level did not help. The auto adjust always happens when anyone speaks, does not even need to be someone speaking loud, they just need to speak and after a couple of seconds the mic level will start auto adjusting. I repeat, this is not a 1 app problem but several, so a common solution is better than a 1 for each app (Which we are talking about more than 50 apps).

What compression tools are available in Ubuntu that can benefit from a multi-core CPU.

I am trying to find and then change the screen DPI (dots per inch) setting in 12.04 and 12.10. However, I can't seem to find any app or config file that can do this. Is there any app or conf file for this?

Note that this is for 12.04+ so the following will not work:

• How do I change the font DPI settings?
• How to change the screen DPI in 11.10?
• Is it possible to change font DPI in 11.04?

Moreover, they are basically changing the font size, not the actual screen DPI.

What are the main differences between PGP (Pretty Good Privacy) and GPG (GNU Privacy Guard) in relationship with security in Ubuntu and Launchpad?

Logitech has a Unifying receiver that you can add several devices using the same USB device. Is this supported in Ubuntu and if so do I have to additionally configure something so that when adding a new wireless device it gets recognized by the same receiver.

Info: http://www.logitech.com/en-us/66/6079

I want to be able to take a picture using the webcam from the terminal. This image then will be saved to a file. How can this be done?

How to check the performance of a hard drive (Either via terminal or GUI). The write speed. The read speed. Cache size and speed. Random speed.

I am in a LAN and there are 3 Ubuntu, 2 Kubuntu, 2 Windows XP and 2 Windows 7. What commands or tools are available to see what PCs are connected to the LAN that it shows the name of the PC and the IP. Similar to tools like Angry IP that show all PCs in a LAN.

Note that I do not know the IPs or names of the computers connected to the LAN. So the tool or command should look for them to.

Is there a way to tell nano to automatically show line numbering each time I open a file?

What are the steps to install the Spelling Check and other language supports for LibreOffice. For example spanish, french, italian, etc..

I'm having serious problems installing the Broadcom drivers for Ubuntu. It worked perfectly on my previous version, but now, it is impossible.

What are the steps to install Broadcom wireless drivers for a BCM43xx card?

I'm a user with no advance knowledge in Linux, so I would need clear explanations on how to make, compile, etc.

lspci -vnn | grep Network showed:

Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] 

iwconfig showed:

lo        no wireless extensions.
eth0      no wireless extensions.

NOTE: Answer below is updated every time new information is added and confirmed working.

What GUI Based Torrent managers exist in Ubuntu and features they offer in terms of:

• Speed to start downloading (Search Speed, Seed, Leech)
• Speed while downloading
• Compatibility
• Stability
• Data check
• Other attributes

What I want is to create a bootable pen drive that shows GRUB menu and I can select any of the several bootable systems from there to install/run. I have several ISO images that I want to install in the USB like Ubuntu, Fedora, System Rescue CD, Windows XP and Windows 7 (The windows versions are optional, mostly am looking for a multi installer for Linux distros, specially Ubuntu version)

The default Startup Disk Creator only works with Linux Images and only 1 at a time (At least for the mean time. If it allows more systems and multiple ISOs it would be awesome)

What method exists that I can use step by step to create a bootable USB Drive with multiple images than can be booted from the USB and selected from GRUB. It must support Windows Images and Linux Images.

Alternatively, is there also a way to have multiple versions of the Ubuntu installation ISO on same USB Drive, such as, when booting from it, I get to choose what Ubuntu version and architecture to install, for example:

BOOT MENU
Ubuntu 12.04 32 Bit
Ubuntu 12.04 64 Bit
Ubuntu 12.10 32 Bit
Ubuntu 12.10 64 Bit

UPDATE: Wanted to add that the English version for the post mentioned by daithib8 is here: MultiSystem – Create a MultiBoot USB from Linux | USB Pen Drive Linux

The server version of Ubuntu does not have the add-apt-repository command. How can I add a Personal Package Archive (PPA) to the server without this command?

Is there a command (Via terminal) to see the temperature of any video card.

Already Tried sensors with the sensors-detect applied. Does not detect for example, Nvidia and ATI video card temperatures.

When developing a page on a localhost, I sometimes get a "Permission denied" error which I can solve by running chmod -R 777 /var/www. However, people are telling me that this is a bad idea for security reasons.

Why shouldn't /var/www have a chmod of 777?