Debian 8: unable to locate package

Question

I have installed Debian 8 (from live debian-live-8.7.1-i386-xfce-desktop.iso) on VirtualBox.

I'm trying to do all the steps described here https://wiki.draglet.com/index.php/Manual:Installation_manual

On this step The following Debian 8 packages are required to run draglet:

apt-get install exim4 ntp pwgen curl php5-dev php-pear pkg-config nmap libzmq3 libzmq3-dev libapache2-mod-php5 apache2 percona-server-server-5.6 php5-cli php5-mysql php5-curl php5-intl daemontools-run oracle-java8-installer ant ruby-compass libtool-bin

when I execute this command I get the output

unable to locate package

.... I get this message for ntp, pwgen and other packages.

How can I install them?

Solution

Have you checked that your /etc/apt/sources.list contains lines similar to the following?

deb http://ftp.us.debian.org/debian/ jessie main non-free contrib
deb-src http://ftp.us.debian.org/debian/ jessie main non-free contrib

deb http://security.debian.org/ jessie/updates main non-free contrib
deb-src http://security.debian.org/ jessie/updates main non-free contrib

You might want to remove any lines that are prefixed with cdrom: if they exist as well.

Remember you will need to edit the file as a root and than run apt-get update. Once you do this try installing the packages again.