I want to make a backup script, that makes a .tar.gz of a folder I define, say fx /root/tekkit/world

This .tar.gz file should then be uploaded to a FTP server, named by the time it was uploaded, for example: 07-10-2012-13-00.tar.gz

How should such backup script be written?

I already figured out the .tar.gz part - just need the naming and the uploading to FTP.

I know that FTP is not the most secure way to do it, but as it is non-sensitive data, and FTP is the only option I have, it will do.

Edit:

I ended up with this script:

#!/bin/bash

# have some path predefined for backup unless one is provided as first argument
BACKUP_DIR="/root/tekkit/world/"
TMP_DIR="/tmp/tekkitbackup/"
FINISH_DIR="/tmp/tekkitfinished/"
# construct name for our archive
TIME=$(date +%d-%m-%Y-%H-%M)

if [ $1 ]; then
    BACKUP_DIR="$1"
fi

echo "Backing up dir ... $BACKUP_DIR"
mkdir $TMP_DIR
cp -R $BACKUP_DIR $TMP_DIR
cd $FINISH_DIR
tar czvfp tekkit-$TIME.tar.gz -C $TMP_DIR .

# create upload script for lftp
cat <<EOF> lftp.upload.script
open server
user user password
lcd $FINISH_DIR
mput tekkit-$TIME.tar.gz
exit
EOF

# start backup using lftp and script we created; if all went well print simple message and clean up 
lftp -f lftp.upload.script && ( echo Upload successfull ; rm lftp.upload.script )