launch firefox ubuntu
then to add it. Note the format of the command
xauth list xauth add ubuntu/unix:0 . 8443108aff2df3cff0d91fa307ad3885
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xauth list xauth add ubuntu/unix:0 . 8443108aff2df3cff0d91fa307ad3885
apt-cache search linux-headers-$(uname -r) apt-get install linux-headers-$(uname -r)
apt-cache search <search string>
apt-get install apt-show-versions apt-show-versions | sort
apt-get --purge remove packagename