WEBMIN

from : http://obihoernchen.net/wordpress/tag/webmin/

for my own documentation

Change hostname and timezone

Note: For GUI lovers: skip this step and set hostname and timezone in the webmin interface (next step)

The default hostname is “alarm”. Let’s change it!

1	hostnamectl set-hostname myhostname

To get all available timezones use:

1	timedatectl list-timezones

And to set your timezone:

1	timedatectl set-timezone <Zone>/<SubZone>

For example:

1	timedatectl set-timezone Europe/Berlin

Now reboot:

1

reboot

Wait a few seconds and reconnect to SSH.

5. Install Webmin

Webmin is a pretty cool web-based interface for system administration.
It’s easy to use  and will help you to configure stuff faster.
To install it use:

1	pacman -Sy webmin perl-net-ssleay

Now we have to allow access from more IP addresses.
You have to edit the configuration file.

1	nano /etc/webmin/miniserv.conf

Find the following line: allow=127.0.0.1
Now add a new allow line with your local network broadcast ip or a specific ip and save the file.
For example:

allow=127.0.0.1 192.168.1.0

Now we’ll enable & start the webmin service so it autostarts.

1 2	systemctl enable webmin systemctl start webmin

To access the Webmin interface open a browser and go to:
https://deviceip:10000

To lower memory usage go to:
Webmin>Webmin Configuration>Advanced Configuration and disable “Pre-load Webmin functions library?”

6. USB Auto Mount

If you want to remove your USB HDD and use it anywhere else it would be cool to have automounting like Windows.
There are a lot of auto mounting mechanisms for Arch Linux but a lot of them are outdated.
This one is using udevil to auto mount all USB HDDs on attach as /media/PARTITION_LABEL. So make sure all partitions have a label!

1	pacman -Sy udevil

I want to access my HDDs via Samba to use them in Windows so I have to use either FAT32 or NTFS.
This sucks because FAT32 isn’t able to handle files >4GB so it’s useless.
And NTFS is fucking slow on Linux.

But with some special mount options we are able to increase the speed dramatically!
I’ve did some benchmarks with hdparm and dd before and after the optimization.
The read speed was pretty good already (about 29MB/s –> USB 2.0 limit).
But the write speed was really bad!

Before: ~6,5 MB/s write speed
After: ~28,5 MB/s write speed

As you can see the write speed on NTFS was really slow before. But there is a way to fix it 
We have to edit the mount options and add a special ntfs-3g option to our udevil automount settings.
Open the udevil config file and edit it:

1	nano /etc/udevil/udevil.conf

Search for default_options_ntfs= and allowed_options=

Now we add the option “big_writes” to both lines so it looks like:

1	..., noatime, big_writes, uid=...

Save the file.

Create the /media directory

1	mkdir /media

Add the udevil service to autostart.

1	systemctl enable devmon@root

Let’s reboot to see whether it works

1

reboot

Wait a few seconds and reconnect to SSH.
Now you’ll have a new folder: /media/yourHDDname where your HDD is mounted.
And you should see something like /dev/sdX1 on /media/… if you type:

1

mount

Note: All USB HDDs should go to standby automatically.
You can check with:

1	hdparm -C /dev/sda