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Quick tips :set guitablabel=%N/\ %t\ %M Show tab number. References: http://vim.wikia.com/wiki/Show_tab_number_in_your_tab_line Show tab number

When I try to restart Apache using sudo service apache2 restart I am getting the following message: * Restarting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName ... waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName To get rid of it, I have to add the following in my /etc/hosts file: 127.0.1.1 ubu1210minib.com ubu1210minib Where ubun1210minib.com ubun1210minib is an arbitrary name I selected. Of course this is not the proper way to fix it as the above information does not properly resolve.  Also need to modify /etc/apache2/sites-enabled/000-default  to have a line like: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName ubu1210minib.com DocumentRoot /var/www Note the line that contains ServerName , that should match with the name pro...

When removing packages, like sudo apt-get remove virtualbox-guest-utils , it may leave configuration files in the system. This can be verified by running dpkg -l | grep 'virtualbox' for example. If the first string shows rc (removed, configuration files present) then purging is necessary, like so: $: sudo lshw -class memory

Show installed package that has a string 'virtualbox' $: dpkg -l | grep 'virtualbox'