Add FTP backup script

FTPDownloadBackup.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+usage()
+{
+cat << EOF
+usage: $0
+
+Connects to an FTP server directory using lftp and runs the \`mirror\` command to download all files and directories to a local directory.
+Automatically appends current datetime as a suffix to the local directory name.
+
+Requirements:
+    - Install \`lftp\`
+    - Add credentials to \`.netrc\` - Example: machine ftp.example.com login USERNAME password FTP_PASSWORD_HERE
+
+OPTIONS:
+    -h        Show this message
+    -u        FTP URI - URI looks something like: ftp://USERNAME@ftp.example.com/your_backups_path
+    -p        LOCAL path to copy the backups to.
+EOF
+}
+
+# Variables
+# URI looks something like: ftp://USERNAME@ftp.example.com/your_backups_path
+URI="";
+LOCAL_PATH="";
+CURRENT_DATETIME="`date +%Y%m%d_%H%M%S`";
+
+while getopts "hu:p:" opt; do
+    case $opt in
+        h)
+            usage
+            exit 0
+            ;;
+        u)
+            URI="${OPTARG}";
+            ;;
+        p)
+            LOCAL_PATH="${OPTARG}";
+            ;;
+        \?)
+            echo "Invalid option: -$OPTARG" >&2
+            exit 1
+            ;;
+        :)
+            echo "Option -$OPTARG requires an argument." >&2
+            exit 1
+            ;;
+    esac
+done
+
+shift $((OPTIND - 1));
+
+if ! [ -x "$(command -v lftp)" ]; then
+    echo "Error: lftp is not installed." >&2
+    exit 1
+fi
+
+if [[ -z "$URI" ]]; then
+    echo "URI is required (-u)";
+    exit 1;
+fi
+
+if [[ -z "${LOCAL_PATH}" ]]; then
+    echo "Local path not specified (-p)";
+    exit 1;
+fi
+
+LOCAL_PATH="$(realpath "${LOCAL_PATH}")/${CURRENT_DATETIME}";
+if [[ ! -d "${LOCAL_PATH}" ]]; then
+    mkdir -p "${LOCAL_PATH}";
+fi
+
+echo "Downloading to ${LOCAL_PATH}";
+lftp -e "mirror . ${LOCAL_PATH}; exit" "${URI}";