====== Ubuntu Tips, Tricks and Notes ======
----
==== Post-Installation ====
Make the output of the **df** command more friendly and less cluttered by creating a system-wide alias for it:
  echo "alias df='df -h -x squashfs -x tmpfs -x devtmpfs'" >> /etc/profile.d/aliases.sh
  
Make sure to set the "always_set_home" variable in the sudoers file (using **visudo**)

=== Disable IPv6 ===
To disable IPv6 on Ubuntu during boot time, open the /etc/default/grub file using your favorite text editor with root privileges and change/add:
  FROM:
  GRUB_CMDLINE_LINUX_DEFAULT=""
  GRUB_CMDLINE_LINUX=""
  TO:
  GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"
  GRUB_CMDLINE_LINUX="ipv6.disable=1"
Once you have made the above change within the /etc/default/grub file execute the following command to apply the GRUB changes:
  sudo update-grub
  
Reboot the system afterwards.

=== Enable console screen blanking ===
Edit the /etc/default/grub file using your favorite text editor with root privileges and add the string **consoleblank=600** to the GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX lines for a 10-minute timeout.  

Once you have made the above change within the /etc/default/grub file execute the following command to apply the GRUB changes:
  sudo update-grub

Reboot the system afterwards.

=== To install Samba: ===

  sudo apt-get install samba cifs-utils

=== To install NFS: ===

  sudo apt-get install nfs-common nfs-kernel-server

=== To install mysql: ===

  sudo apt install mysql-server
  sudo mysql_secure_installation

=== Customizing the MOTD ===
Put any customization data into /etc/motd

=== Installing apache and php ===
  sudo apt update
  sudo apt install apache2
  sudo apt install php libapache2-mod-php
  sudo apt install php-mysql php-gd php-xml
  sudo apt install phpmyadmin php-mbstring php-gettext

=== Install phpmyadmin ===
  sudo apt update
  sudo apt install phpmyadmin
  mysql
  mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '<password>';
  
=== Installing Portainer to manage Docker containers ===

  sudo docker run -d -p 9443:9443 -p 8000:8000 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest

=== Disable interactive restart prompt while upgrading packages with apt ===
The trouble in this case is with the ''needrestart'' command, which is part of the apt-get upgrade process in Ubuntu now. By default this is set to “interactive” mode which causes the interruption of scripts.

To change this behavior, we can edit the ''/etc/needrestart/needrestart.conf'' file, changing the line:

''#$nrconf{restart} = 'i';''

to

''$nrconf{restart} = 'a';'' (if we want to restart the services automatically) or ''$nrconf{restart} = 'l';'' to simply list the services that need restart.