My eTrayz NAS starts up with lots of services that I don’t need, like iTunes-server (mt-daapd), MiniDLNA, etc.
I put together this little script do easily check the current runlevel services and to disable them. Nothing spectacular but still 🙂

#!/bin/sh
chkconfig --list | grep "3:on"

echo "Removing $service"
chkconfig --del $service
for i in 1 2 3 4 5 6; do
chkconfig --level $i $service off
echo "Service $service in runlevel $i turned off."
done
chkconfig --list | grep -i $service



feed=http://ipkg.nslu2-linux.org/feeds/optware/cs05q3armel/cross/stable/
ipk_name=$(wget -qO- $feed/Packages | awk '/^Filename: ipkg-opt/ {print $2}')
wget $feed/$ipk_name
tar -xOvzf $ipk_name ./data.tar.gz | tar -C / -xzvf -
mkdir -p /opt/etc/ipkg
echo "src armel http://ipkg.nslu2-linux.org/feeds/optware/cs05q3armel/cross/stable/" > /opt/etc/ipkg/armel-feed.conf
wget http://mybookworld.wikidot.com/local--files/optware/sort_dirname.tar.gz
tar xvfz sort_dirname.tar.gz -C /
export PATH=$PATH:/opt/bin:.
ipkg update
ipkg install gcc


ANd the next eTRAYZ mod: MRTG.

1. Install net-snmp
ipkg install net-snmp

2. Install mrtg
ipkg install mrtg

3. Change config snmpd.conf in /opt/etc/snmpd.conf to reflect these changes:
# rocommunity: a SNMPv1/SNMPv2c read-only access community name
# arguments: community [default|hostname|network/bits] [oid]

#rwcommunity SNMPv1_RW

4. Restart snmpd daemon with
/opt/etc/init.d/S70net-snmp restart

5. Make mrtg folder with
mkdir /opt/etc/mrtg

6. Create mrtg profile for localhost with
cfgmaker public@localhost >> /opt/etc/mrtg/mrtg.cfg

7. Make mrtg WorkDir with
mkdir /home/sysadmin/WWW/mrtg

8. Reflect this folder as WorkDir in
vi /opt/etc/mrtg/mrtg.conf

9. Make HTML file with
indexmaker --output=/home/sysadmin/WWW/mrtg/index.html /opt/etc/mrtg/mrtg.cfg

10. Make crontab entry with crontab -e and add
*/5 * * * * root cd /opt/bin/ && ./mrtg /opt/etc/mrtg/mrtg.cfg --logging /var/log/mrtg.log

11. Restart cron with
crond restart

12. To be sure, reset permissions:
chown -R sysadmin:etrayz /home/sysadmin/WWW/mrtg/


13. Browse to http://etrayz/mrtg/index.html and enjoy.

I want to monitor the network usage on my eTRAYZ. So I installed vnstat and a php frontend.
Here’s a guide.

1. Install vnstat using ipkg.

ipkg update
ipkg install vnstat


2. Create vnstat database.
vnstat -u -i eth0

3. Change to the web folder and download the PHP frontend

cd /home/sysadmin/WWW
wget http://www.sqweek.com/sqweek/files/vnstat_php_frontend-1.4.tar.gz


4. Expand the archive, delete it and rename the folder
tar xvzf vnstat_php_frontend-1.4.tar.gz
rm vnstat_php_frontend-1.4.tar.gz
mv vnstat_php_frontend-1.4 vnstat


5. Change to the new directory and edit config.php using command

cd vnstat
vi config.php

and change the variable $iface_list so that the line reads
$iface_list = array('eth0');

6. Delete these two lines:
$iface_title['eth1'] = 'Internet';
$iface_title['sixxs'] = 'SixXS IPv6';

If you want you can change the friendly name for $iface_title[‘eth0’]. Do not change the definition of variable $vnstat_bin, this must be left blank because the php script that calls vnstat uses a “\” which is not allowed by the php service in safe mode. Safe and quit vi.

7. Consequently we have to set up a cronjob to dump the vnstat data in to the “dumps” directory defined in variable $data_dir. Make the directory dumps:
mkdir dumps

8. Now we need to make a script and cronjob to update the nvstat data and create the dumpfile. Make a folder for your scripts
mkdir /home/sysadmin/my_scripts

9. Create a script file for cronjob to run
vi /home/sysadmin/my_scripts/vnstatdump.sh
…and paste the following lines into it

#!/bin/bash
/opt/bin/vnstat -u
sleep 10
/opt/bin/vnstat --dumpdb -i eth0 >> /home/sysadmin/WWW/vnstat/dumps/vnstat_dump_eth0


10. Make the script executable by doing:

chmod +x /home/sysadmin/my_scripts/vnstatdump.sh

and test the script by running it
sh /home/sysadmin/my_scripts/vnstatdump.shvnstatdump.sh

There shouldn’t be any error messages.

11. Create the cronjob schedule

vi /etc/crontab

… and enter new lines for however frequently you want the web page data to be updated. For instance to have it updated every hour at 1 minute past the hour enter a line like
1 * * * * root /home/sysadmin/my_scripts/vnstatdump.sh

12. Restart crond, i.e. “crond restart”
Use your internet browser and open the index.php page: http://etrayz/vnstat/index.php. Done.