====== Setting up a new Linux box ======
This page goes through the various settings that take place to setup a new Ubuntu box. In this case I was setting Ubuntu 12.04 Precise Pangolin.

===== Install Configuration / Steps =====
  * Hardware details
    * AMD 3 core CPU
    * 2 x 500 GB Hard disk
    * 1 DVD R/W
    * 16 GB RAM
  * Software install configuration
    * RAID 1 array with the two disks
    * Allocated 20 GB for SWAP and 480 GB for /
    * Include LAMP, Samba, Mail (Postfix) as default services to be installed
    * Configure server as "Internet Site"

===== System Configuration =====
  * Update system by running "aptitude"
    * Completed Security Upgrades
    * Complete Package Upgrades
    * Reboot
  * Network configuration
    * Update settings on router to designate IP address for server MAC address (ensure same IP allocation)
      * Optionally do this for other devices on the network too
    * Update Port forwarding on router to server for HTTP, HTTPS, SSH and SMTP
    * Update info with DNS registry (such as godaddy) with WAN IP for A & MX records
  * Install svn (using aptitude)
  * Put [[tech:svn:using_subversion_to_version_control_etc|/etc on version control]]
  * Update /etc/skel with [[etc_skel|this]] set
  * Creating new users
    * Update /etc/default/useradd as required.  E.g. change SHELL to SHELL=/bin/bash
    * Create additional [[commands_to_add_users_and_groups#adding_user_-_ubuntu|users]] as required
    * Remember to delete the .svn directory inside the users home directory (of the new user).  Because we have /etc on subversion, this would have inadvertently bought in the .svn directory into the home folder.  We do not want that incorrect svn directory sitting there!
  * Install the [[most_common_packages|most common packages]] that will the required

===== DNS Server Configuration =====
Currently ''ubv48'' is setup as DNS server using ''dnsmasq''.\\
Update ''/etc/resolv.conf'' file as below:
<code>
nameserver 192.168.1.48
nameserver 192.168.1.49
nameserver 192.168.1.1
nameserver 8.8.8.8
options timeout:1
options attempts:1
</code>

Update ''/etc/network/interfaces'' file as below:
<code>
iface enp0s3 inet static
        address 192.168.1.47
        netmask 255.255.255.0
        network 192.168.1.0
        gateway 192.168.1.1
        broadcast 192.168.1.255
        dns-nameservers 192.168.1.48
        dns-nameservers 192.168.1.1
        dns-nameservers 8.8.8.8
</code>
===== apt related =====
  * [[tech:linux:apt_upgrades|Automatic apt upgrades]]
  * [[tech:linux:apt_update_resource_overload|APT update resource overload]]

===== More items =====
  * Kernel
    * To avoid kernel update do this 
      * Debian: <code bash>aptitude hold linux-image-amd64</code>
      * Ubuntu: <code bash>aptitude hold linux-image-generic</code>
    * Reason: VirtualBox GA will need to be reinstalled every time kernel is updated
  * Mail
    * Setup postfix
    * Setup alias such that local mail gets forwarded (/etc/aliases)
  * SSH
    * Generate SSH private and public keys
  * Tuning
    * Change swapiness and other parameters based on server needs - [[tech:linux:sysctl_config|sysctl.conf]]
  * Others
    * Optionally ask server to reboot automatically on [[tech1:linux:kernel_panic|kernel panic]]
    * [[tech1:linux:others:i2c_piix4|Disable module i2c_piix4]] on Virtual Machines
    * Install NRPE to be monitored
      * nagios-nrpe-server nagios-plugins
    * Install x11-utils x11-xserver-utils
  * Packages to install 
    * If Physical Machine
      * cpp dkms gcc make heirloom-mailx mysql-common nmap postfix smartmontools sysstat unzip telnetd
    * If VM
      * cpp gcc make heirloom-mailx mysql-common nmap postfix sysstat unzip telnetd

===== Other Items configuration =====
  * Remove cloud-init <code>aptitude purge cloud-init</code>
  * Remove snapd <code>apt autoremove --purge snapd</code>
  * [[apache_configuration|Apache Configuration]]
  * [[etc_skel#sudo_without_password|Setup to sudo without password]]
  * [[tech:linux:mail_server_setup|Mail Server Configuration]]
  * [[tech:linux:mysql:backups|MySQL Backups]]
  * [[tech:linux:others:ntp_update|Reset System Clock with NTP Update]]
  * [[tech:linux:others:pflogsumm_mail_report|Setup mail reporting using pflogsumm]]
  * [[tech:linux:others:notify_reboot_req|Notify if the system requires a reboot]]
  * [[tech:others:mounting_usb_drive_in_ubuntu&#permanently_mount_the_usb_drive|Mounting a USB drive permanently for Backups]]
  * Install telnetd - To be used in case SSH server is down.  Remember to change password immediately if doing a remote connection.
  * [[tech:linux:php_ini|Update php.ini]] configuration file to improve on default limits
  * Stop/Purge Ubuntu error reporting daemon <code>aptitude -y purge whoopsie</code>
  * [[apt_update_resource_overload|Disable APT update resource overload]]
  * Nagios
    * If only setting this up for being monitored install nagios-nrpe-server nagios-plugins