Standard variable definition

Package manager

###PKGM: defines package manager Options

PKGM="apt" #Normal view
PKGM="debconf-apt-progress -- apt" #Whiptail view

Usage

As replacement for package manager command (example: apt)
Defining pakage manager for use in other Vars

###PKGI: defines command to install command (requires PKGM to be set) Options

PKGI="${PKGM} install -y"

Usage

$PKGI <package name>

###PKGA: defines command to add repo Options

PKGA="add-apt-repository" (software-properties-common is required)

Usage

$PKGA ppa:ondrej/php -y

###OUTPUT: used to silence a script Options

OUTPUT='/dev/null' #Hide output
OUTPUT='/dev/tty'  #Display output

Usage

YourCommand > $OUTPUT 2>&1