I recently installed Ubuntu Server edition 13.10 (Saucy Salamander). But I have run into a bit of problem.
At the end of the installation, it asks about several extra packages whether you want them or not, like OpenSSH server and virtual machine host. Here's what I'm looking at:
Now, my problem is that I can't remember if I have checked the "virtual machine host" checkbox. How do I check if my server has the corresponding packages?
What packages come with the virtual machine host?
When I restart my Apache server using the command
sudo /etc/init.d/apache2 restart
I get the following error:
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
Is the server using 127.0.1.1 instead of 127.0.0.1? What causes this error?
I have used top to see the memory usage at the moment. But I would like to monitor the memory usage over a period of time. E.g start monitoring and then execute a few commands, and final stop the monitoring and see how much memory that have been used during the period.
How can I do this on Ubuntu Server?
I guess I could start a cronjob every 5th second or so, and invoke a command that log the current memory usage in a textfile. But what command should I use to get the current memory usage in a format that is easy to log to a text file?
I switched from SLES to Ubuntu and now I want to restart my local server. In SLES I used:
rcapache2 restart
but this seems not to work in Ubuntu.
How do I restart Apache?
As a Linux/Ubuntu newbie, what is LVM and what is it used for?
In terms of a web server installation, what benefits does it provide?
Would you recommend using it?