Shell Programming and Scripting

#!/bin/bash

dl_dir="/opt"


function file_download()
{
    wget $2 -P "$dl_dir"
    tar xzf $1 -C $1
}

function user_create()
{
    useradd -s /usr/sbin/nologin -r $2
    chown -R $1 /opt/$1
}

# NGINX
name="nginx"
name_url="http://nginx.org/download/nginx-1.1.2.tar.gz"
file_download "$name" "${name}_url"
user_create "$name" "${name}_user"

#!/bin/bash

dl_dir="/opt"

function file_download()
{

# Grab filename from URL string
    filename={$2##*/}

# Download URL into download directory
    wget $2 -P "$dl_dir"

# Untar the filename and move to named folder in download directory
    tar xzf $filename -C "${dl_dir}/${name}"

# Remove original tarball
    rm  "${dl_dir}/${name}"	
}

# NGINX
name="nginx"
name_url="http://nginx.org/download/nginx-1.1.2.tar.gz"
file_download "$name" "${name}_url"