After downloading the software from epson &amp; running the ./install.sh file as instructed, I get the following error: Err:19 http://www.getdeb.net/ubuntu xenial-getdeb/apps amd64 Packages   403  Forbidden Ign:20 http://www.getdeb.net/ubuntu xenial-getdeb/apps i386 Packages Reading package lists... Done W: The repository 'http://archive.getdeb.net/ubuntu xenial-getdeb Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Failed to fetch http://www.getdeb.net/ubuntu/dists/xenial-getdeb/apps/binary-amd64/Packages  403  Forbidden E: Some index files failed to download. They have been ignored, or old ones used  Any help with this problem would be much appreciated.
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?
How does MySQL process ORDER BY and LIMIT in a query? how to restore windows 7 to a know working state every time it boots A couple of days ago my mother asked me to set up a computer at her house, she wants to use it to basic web browsing, video chat and nothing more.  The problem is, neither my mother nor my sister know anything about using or maintaining a computer.  What I want is to have a working base install of windows 7 and just discard everything installed, downloaded, ... when it reboots. That way I can set up a partition just for saving files and whatever they do the computer will always return to a working state at start up.  can that be done?  PS: Sadly linux is not an option since my sister wants to be able to play some games with my steam account and not all of them run with wine. Play Framework (2.1.3) doesn't run any tests Complement property of DES I'm supposed to show the complement property of DES ($c=DES(p,k) =&gt; \bar c = DES(\bar p, \bar k)$).  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Or skip the quote altogether and write a short summary. I feel, in the current form, this should have been a comment that just links to the original article.  Am I too pedantic? Should I flag this as not an answer? Should I downvote it? What do you think about such answers? How can I remove duplicate rows? What is the best way to remove duplicate rows from a fairly large SQL Server table (i.e. 300,000+ rows)?  The rows, of course, will not be perfect duplicates because of the existence of the RowID identity field.  MyTable  RowID int not null identity(1,1) primary key, Col1 varchar(20) not null, Col2 varchar(2048) not null, Col3 tinyint not null How to enumerate an enum How can you enumerate an enum in C#?  E.g. the following code does not compile:  public enum Suit {     Spades,     Hearts,     Clubs,     Diamonds }  public void EnumerateAllSuitsDemoMethod() {     foreach (Suit suit in Suit)     {         DoSomething(suit);     } }   And it gives the following compile-time error:     'Suit' is a 'type' but is used like a 'variable'   It fails on the Suit keyword, the second one. Does the alarm work when my phone is turned off? An inequality from Littlewood's Miscellany I keep reading about  ('PPAs') and people answer questions with a link to a PPA. What's the best way to use these?     There are multiple valid answers for this question spanning over several versions of Ubuntu. For your convenience, an index of each is below.