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The repositories of Ubuntu are owned by third parties and hence it is their responsibility to update the servers on time. As the server you are using is not always updated, you should consider using other servers. The main server works very well in the Indian subcontinent. Otherwise you may use the Nayatel pvt. ltd server which is located in Pakistan. ...


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Support for Ubuntu 13.04 "Raring Ringtail" ended 2014-01-27 so most mirrors don't provide raring-backports any more. As you are using Ubuntu 14.04 und already have trusty-backports activated there isn't any reason to use the package source anyway. Just remove it.


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To check which versions are available, you can check via: sudo apt-cache madison ^apache2 Then copy the version or use the following syntax: sudo apt-get install apache2=2.2\* To check which version you've installed, run: dpkg -l 'apache2*' | grep ^i


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From https://wiki.ubuntu.com/Mirrors#Communication if you have questions, email us at mirrors@ubuntu.com. You could also try posting to the Mirrors mailing list at https://lists.ubuntu.com/mailman/listinfo/ubuntu-mirrors


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This PPA doesn't exist. Do you mean ppa:gluster/glusterfs-3.5?


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QT assistant is packaged as part of qttools5-dev-tools, you will also want qt5-doc for the QT5 SDK documentation. To install run the following command: sudo apt-get install qt5-doc qttools5-dev-tools To launch you can run this command from a terminal: /usr/lib/x86_64-linux-gnu/qt5/bin/assistant You may want to create a desktop file to make it ...


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Remove this line: deb http://mirrors.ocf.berkeley.edu/ubuntu/ raring-backports main restricted universe and use this list to select a mirror. As Florian Diesch has already answered: Support for Ubuntu 13.04 "Raring Ringtail" ended 2014-01-27 so most mirrors don't provide raring-backports any more.


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To have it add ppa.launchpad.net lines as ppa:$USER/$PPA. Add other repositories with their full line from *.list files. No dupe lines. #!/bin/bash # My ~/bin/mk_repositories_restore_script mkdir -p ~/bin x=~/bin/restore_repositories echo \#\!/bin/bash > $x chmod u+x $x ( for APT in $( find /etc/apt/ -name \*.list ) do sed -n -e '/^deb /{ ...


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apt-key add adds a key to /etc/apt/trusted.gpg by default. These keys are from Ubuntu repositories: pub 1024D/437D05B5 2004-09-12 uid Ubuntu Archive Automatic Signing Key <master@ubuntu.com> sub 2048g/79164387 2004-09-12 pub 1024D/FBB75451 2004-12-30 uid Ubuntu CD Image Automatic Signing Key ...


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The README seems to be outdated (you don't want raring backports). Just add a line for a CRAN mirror, e.g. the CRAN master in Vienna: deb http://cran.at.r-project.org/bin/linux/ubuntu trusty/ Alternatively you could use the Ubuntu R PPA, which can be added using the following syntax: sudo add-apt-repository ppa:marutter/rrutter


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save the whole content of this link in ~/key . Then in terminal, type sudo apt-key add ~/key and you should get an OK message. Further reading: How to remove keys



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