Purge old kernels

https://mintguide.org/system/622-purge-old-kernels-safe-way-to-remove-old-kernels.html

How to Integrate JabRef with LibreOffice on Ubuntu GNU/Linux

http://onetransistor.blogspot.in/2015/04/libreoffice-bibliography-jabref.html

https://timbalaning.wordpress.com/2016/04/12/how-to-integrate-jabref-with-libreoffice-in-ubuntu-gnulinux/

end note recognizes every bracket as an in-text citation

http://community.thomsonreuters.com/t5/EndNote-General/end-note-recognizes-every-bracket-as-an-in-text-citation/td-p/49447

gpg key error gpg: keyblock resource ‘/etc/apt/trusted.gpg.d//webupd8team-sublime-text-3.gpg’: resource limit

http://askubuntu.com/questions/446453/gpg-keyblock-resource-etc-apt-trusted-gpg-d-webupd8team-sublime-text-3-gpg


this works

sudo apt install add-apt-key -y

How To Increase Virtualbox Disk Size For Dynamically Allocated Disks

https://www.linuxbabe.com/virtualbox/how-to-increase-virtualbox-disk-size-for-dynamically-allocated-disks

How To Increase Virtualbox Disk Size For Dynamically Allocated Disks

https://www.linuxbabe.com/virtualbox/how-to-increase-virtualbox-disk-size-for-dynamically-allocated-disks

How to count number of unique values of a field in a tab-delimited text file?

http://stackoverflow.com/questions/3502177/how-to-count-number-of-unique-values-of-a-field-in-a-tab-delimited-text-file