I am using Ubuntu 20.4 and I am attempting to install DSD by debi  20.4 main But I get this response: debi: warning:     debian/changelog(l12): found start of entry where expected more change data or trailer LINE: sdrangel (6.7.0-1) unstable; urgency=medium debi: warning:     debian/changelog(l12): found end of file where expected more change data or trailer debi: can't read sdrangel_6.8.0-1_amd64.changes!  The developer of DSD really wants us to use DOCKER to install full versions of SDRAngel, which includes DSD, so I tried that, as well: sudo add-apt-repository &quot;deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable&quot;  BUT I receive this response: Hit:1 http://us.archive.ubuntu.com/ubuntu focal InRelease Hit:2 https://download.docker.com/linux/ubuntu focal InRelease                                                     Get:3 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]                                         Get:4 http://security.ubuntu.com/ubuntu focal-security InRelease [109 kB]                       Ign:5 http://ppa.launchpad.net/szechyjs/dsd/ubuntu focal InRelease                         Get:6 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]                               Err:7 http://ppa.launchpad.net/szechyjs/dsd/ubuntu focal Release                                             404  Not Found [IP: 91.189.95.85 80] Get:8 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 DEP-11 Metadata [264 kB] Get:9 http://us.archive.ubuntu.com/ubuntu focal-updates/universe amd64 DEP-11 Metadata [303 kB] Get:10 http://us.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 DEP-11 Metadata [2,468 B] Get:11 http://us.archive.ubuntu.com/ubuntu focal-backports/universe amd64 DEP-11 Metadata [1,768 B] Get:12 http://security.ubuntu.com/ubuntu focal-security/main amd64 DEP-11 Metadata [24.3 kB]        Get:13 http://security.ubuntu.com/ubuntu focal-security/universe amd64 DEP-11 Metadata [58.2 kB] Reading package lists... Done                E: The repository 'http://ppa.launchpad.net/szechyjs/dsd/ubuntu focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.  It appears from these two responses that the DSD component for Ubuntu 20.04 is absent. It appears that past and future releases of Ubuntu have valid DSD repositories. 20.04 seems to have an abnormally ended file repository. I am assuming here that the DSD repository needs to be rebuilt and replaced, then the Docker container for 20.04 be rebuilt and replaced. I left a note with the DSD developer yesterday in github, but no response as of this afternoon from anyone. I don't know where is the appropriate forum to lodge this issue. I would have assumed the repository should have been submitted by the DSD developer. But, I can see the potential that the Ubuntu repository build might be managed by someone other than the developer, so maybe a repository maintainer issue. In the case of the Docker container, it might be some issue with the container publishing function. Can those familiar with this whole process advise me on how to properly direct this (these?) issue(s)? Many thanks, Shane
When updating, I get the following error message:   W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial Release' does not have a Release file.   Here, I find another statement on this error:   This recommends removing certain PPAs; and, I'm not sure if I should do that since it might mean not getting the updates that I need.    Is this what I should do?
Young adult book about a boy(?) who gets sent through a portal to another world which is really the distant future Norm $N$ on $\Bbb Z[\sqrt d]$ is multiplicative, $N(x)$ prime $\Rightarrow x$ irreducible How Deep Are Bender's Insides? Bender often pulls large objects from his torso cupboard, but how deep or how much empty space is he capable of storing? Can he bend space around the perimeters of the frame of his torso's door? If that is the case, does it also bend time? I suppose he might bend in more ways than one... Trying to install Ubuntu on Dell XPS 15 (9570) I have been trying to install Ubuntu on my new laptop:     Dell XPS 15 (9570)   Windows 10 Home 64bit English   8th Generation Intel(R) Core(TM) i7-8750H Processor (9M Cache, up to 4.1 GHz, 6 cores)   16GB, 2x8GB, DDR4, 2666MHz   256GB M.2 2280 PCIe Solid State Drive   NVIDIA(R) GeForce(R) GTX 1050Ti with 4GB GDDR5     I began by trying to install Ubuntu 18.04 LTS using an 8GB USB drive. The first issue I ran into was getting frozen on the bootup screen on the fourth dot. After a couple tries, I plugged in my monitor (through HDMI) and it stopped getting stuck all of a sudden.    Next, I tried to go through the installation and when I clicked on restart now, my computer froze and I had to shut it down manually and start it back up again. At this point I got to the login screen and logged in but after entering my password it got stuck on a purple screen with my mouse pointer (which was frozen). I was able to get into a shell at this point (with ctrl+alt+f4) and attempted to run sudo apt-get install nvidia-390 but this froze when it reached building initial module for 4.15.0-22-generic and upon reboot I had to run sudo dpkg --remove -a.    I was unable to work around this so I attempted to install Ubuntu 16.04 which I could only do by adding acpi=off to the boot configuration (which by the way, I had a lot of trouble getting to since GRUB usually flashed in and then immediately disappeared and only occasionally would it stick around long enough for me to use). But when I try to boot up now, I never reach the screen with the five dots and instead immediately get stuck on a purple screen (with no mouse pointer).  I reinstalled Ubuntu 18.04 and am back to being stuck on the log-in screen.  What should I do? Sugar daddy wants my online banking login info to make deposits — is it a scam? Why do electrons around nucleus radiate light according to classical physics As I navigate through physics stackexchange, I noticed .  Electrons radiate light when revolving around nucleus? Why is it so obvious?  Note that I do not know anything about quantum mechanics - and I just want classical stories. 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So, is the singularity just a single point in the curved spacetime, or can it be a more extended object, described by a single coordinate? Can I rename the wp-admin folder? Is it possible to rename the wp-admin folder?  I know I could just rename it, but unless it's supported by the code lots of things would break.  If I use a custom folder name, it will make it slightly more secure, security by obscurity and all that. PHP: Replace umlauts with closest 7-bit ASCII equivalent in an UTF-8 string What I want to do is to remove all accents and umlauts from a string, turning "lärm" into "larm" or "andré" into "andre". What I tried to do was to utf8_decode the string and then use strtr on it, but since my source file is saved as UTF-8 file, I can't enter the ISO-8859-15 characters for all umlauts - the editor inserts the UTF-8 characters.  Obviously a solution for this would be to have an include that's an ISO-8859-15 file, but there must be a better way than to have another required include?  echo strtr(utf8_decode($input),             'ŠŒŽšœžŸ¥µÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýÿ',            'SOZsozYYuAAAAAAACEEEEIIIIDNOOOOOOUUUUYsaaaaaaaceeeeiiiionoooooouuuuyy');   UPDATE: Maybe I was a bit inaccurate with what I try to do: I do not actually want to remove the umlauts, but to replace them with their closest "one character ASCII" equivalent. Methods to find $\lim\limits_{n\to\infty}\frac1n\sum\limits_{k=1}^nn^{1/k} $ What would you suggest here?  $$\lim_{n\to\infty} \frac{1}{n} \sum_{k=1}^{n} n^{1/k} $$ changing notification emails from WordPress @mydomain.net to something else How do I change notification emails address from WordPress @mydomain.net to something else.  I want to do this because WordPress @mydomain.net ends up getting flagged as junk mail.  Thanks  Daniel Can I open a US bank account even if I don't live in the country? Prove if $|z| < 1$ and $ |w| < 1$, then $|1-zw^*| \neq 0$ and $| {{z-w} \over {1-zw^*}}| < 1$ How to reduce the thickness of letters How to show  tag literally in / tag? Laptop w/o battery US bound flight? According to some reports, your electronic devices are checked whether they turn on before you can get on a US bound flight. What if I carry around a laptop without a battery? How can one obtain an adamantine weapon?