Lets take a look at it:

#!/bin/bash
BLOG_PATH="/path/to/the/directory/that/contains/your/blog.conf/"
BLOG_NAME="orvtech.com"
DATE=`date +%d%b%Y-h%Hm%M`
NO_BAKUP="cache/*"
SCP_SERVER=""
SCP_USER=""
SCP_PORT="22"

cd $BLOG_PATH
tar -czpsf ~/$BLOG_NAME-nanoblogger.$DATE.tar.gz --exclude "$NO_BAKUP" *
ls -lah  ~/$BLOG_NAME-nanoblogger.$DATE.tar.gz
scp -P$SCP_PORT ~/$BLOG_NAME-nanoblogger.$DATE.tar.gz $SCP_USER@$SCP_SERVER:~/

Spanish version: Respaldar NanoBlogger.

du -a ~/ | sort -n -r | head -n 10

If we use the `find` command we can list the 10 biggest files inside a directory, even if they are inside sub-folders.

find ~/ -type f -exec ls -ls {} \; | awk '{print $6"\t"$9}' | sort -k1 -n -r | head -n 10

For this we will be using 3 code segments, the first would be the HTML form that will allow us to enter the content and pass those values to the CGI besides those two we have a javascript segment that allow us to preview the actual article that we are submitting.

The Form.
In other to have a bit of eye-candy i decided to use the heather and cascade style sheet from the actual style i am using for NanoBlogger. I found that the easiest way was to create a file by running `nb -b /path/of/the/blog/ make-file nb_send_entry.txt`. This will create a template that we can use to add the form HTML inside the 'BODY' section.

The product of this code is a web page with the same look and feel that the blog has. Here is a sample from our Spanish site:

The JavaScript.
If you take a look at above source code we have a 'preview' button; this button calls the function openPreview. The idea of this function is to show how would the HTML that we are codding look using the current style. You can get a good idea on how would this entry look before you submit it. Here is the code:

As you can see we are defining a new window and opening it with the content we entered on the form, it uses the nb_default.css. Most of the customizations can be done on in popWin.document.writeln in case you want to adapt it to your blog. Remember that this is a proof of concept and that it can still be improved, perhaps we can latter make it to read the blog.conf file. Here is a screenshot of how it looks.

All you need is BASH.
A CGI codded in bash to create the new entry for the blog. Here is the source code of send_nb_entry.cgi

We can latter import the file defined by $DRAFT_ENTRY_DIRECTORY/$name_entrada_tmp issuing the command:

This will add the entry to our blog. I though about automating this in the CGI but at this point i prefer to create a central control panel and keep things separated.

Spanish version: Interfaz web para agregar entradas a NanoBlogger.

This script allows you to start, stop, reload the configuration and restart the service. lets take a look at /etc/init.d/zncd

If your NSLU2 is running gentoo you could add it to the default run level like this:

The output should be something like this:

Spanish version: script de arranque para ZNC bouncer.

Lets take a look at this interesting howto:

Once you have installed Ubuntu, log in and update your packages:

sudo -i apt-get update

Then install the following packages:

sudo -i apt-get install linux-sound-base bluetooth bluez bluez-alsa bluez-btsco bluez-compat bluez-utils python python-bluez vlc

Note: I do alot of other development stuff on my unit. I may have left off something, and if so let me know if you try it and it doesn't work.
Now that the needed packages are installed, an .asoundrc needs to be created in your user home directory. An example:

pcm.bluetooth { type bluetooth device 00:00:00:00:00:00 }

Edit the device section with the MAC address of your bluetooth headset. To find this, issue a reset of the bluetooth adapter by issuing the command:

hciconfig hci0 reset

Then place your headset in pairing mode and issue the following command:

sdptool browse

Now copy the following python script into a file named pair.py:

#!/usr/bin/python import gobject import sys import dbus import dbus.service import dbus.mainloop.glib class Rejected(dbus.DBusException): _dbus_error_name = "org.bluez.Error.Rejected" class Agent(dbus.service.Object): exit_on_release = True def set_exit_on_release(self, exit_on_release): self.exit_on_release = exit_on_release @dbus.service.method("org.bluez.Agent", in_signature="", out_signature="") def Release(self): print "Release" if self.exit_on_release: mainloop.quit() @dbus.service.method("org.bluez.Agent", in_signature="os", out_signature="") def Authorize(self, device, uuid): print "Authorize (%s, %s)" % (device, uuid) authorize = raw_input("Authorize connection (yes/no): ") if (authorize == "yes"): return raise Rejected("Connection rejected by user") @dbus.service.method("org.bluez.Agent", in_signature="o", out_signature="s") def RequestPinCode(self, device): print "RequestPinCode (%s)" % (device) return raw_input("Enter PIN Code: ") @dbus.service.method("org.bluez.Agent", in_signature="o", out_signature="u") def RequestPasskey(self, device): print "RequestPasskey (%s)" % (device) passkey = raw_input("Enter passkey: ") return dbus.UInt32(passkey) @dbus.service.method("org.bluez.Agent", in_signature="ou", out_signature="") def DisplayPasskey(self, device, passkey): print "DisplayPasskey (%s, %d)" % (device, passkey) @dbus.service.method("org.bluez.Agent", in_signature="ou", out_signature="") def RequestConfirmation(self, device, passkey): print "RequestConfirmation (%s, %d)" % (device, passkey) confirm = raw_input("Confirm passkey (yes/no): ") if (confirm == "yes"): return raise Rejected("Passkey doesn't match") @dbus.service.method("org.bluez.Agent", in_signature="s", out_signature="") def ConfirmModeChange(self, mode): print "ConfirmModeChange (%s)" % (mode) @dbus.service.method("org.bluez.Agent", in_signature="", out_signature="") def Cancel(self): print "Cancel" def create_device_reply(device): print "New device (%s)" % (device) mainloop.quit() def create_device_error(error): print "Creating device failed: %s" % (error) mainloop.quit() if __name__ == '__main__': dbus.mainloop.glib.DBusGMainLoop(set_as_default=True) bus = dbus.SystemBus() manager = dbus.Interface(bus.get_object("org.bluez", "/"), "org.bluez.Manager") if len(sys.argv) > 1: path = manager.FindAdapter(sys.argv[1]) else: path = manager.DefaultAdapter() adapter = dbus.Interface(bus.get_object("org.bluez", path), "org.bluez.Adapter") path = "/test/agent" agent = Agent(bus, path) mainloop = gobject.MainLoop() if len(sys.argv) > 2: if len(sys.argv) > 3: device = adapter.FindDevice(sys.argv[2]) adapter.RemoveDevice(device) agent.set_exit_on_release(False) adapter.CreatePairedDevice(sys.argv[2], path, "DisplayYesNo", reply_handler=create_device_reply, error_handler=create_device_error) else: adapter.RegisterAgent(path, "DisplayYesNo") print "Agent registered" mainloop.run() #adapter.UnregisterAgent(path) #print "Agent unregistered"

Now place your headset into pairing mode again and issue the follow command:

sudo -i python pair.py hci0 00:00:00:00:00:00

Once again replacing the address above with your headsets MAC. The last step involves editing the vlcrc. To do this, issue the command:

pico .vlc/vlcrc

Scroll down and replace:

alsadev=(default soundcard)

To:

alsadev=bluetooth

If it does not exist then create it.

Now you should be ready to listen to audio. To listen to the audio from NASA TV's online video stream, issue the command:

cvlc --aout-rate 8000 --novideo http://www.nasa.gov/55644main_NASATV_Windows.asx

If everything is working you should hear audio. Keep in mind that the sample rate needs to be 8000Hz since that is the sample rate the headset can handle.

To pair another headset, or to re-pair the current, the /var/lib/bluetooth/(your MAC)/linkkeys file must be deleted. It will regenerate once you have paired the devices. Also remember that the .asoundrc file must be edited to match a different headset as the MAC will be different.

To find out more info about this article, please visit POTUSCamacho Industries blog.

Spanish version: Audio vía bluetooh desde el NSLU2.

The workaround.
We will keep using the /latest url for the redirects the only thing is that we will use a CGI written in BASH to accomplish the redirect. The script will parse our RSS feed (rss.xml) to check which is the latest post and redirect to that url. The redirect is accomplished by sending the HTTP headers 'Location' and 'Status'. Let's take a look at the script:
latest.cgi
#!/bin/bash DocummentRoot="/var/www/linuxevolution.org/htdocs" Latest=`cat $DocummentRoot/rss.xml | grep link | grep archives | head -n1 | sed -e :a -e 's/<[^>]*>//g;/</N;//ba'` echo "Status: 302 Moved" echo -e "Location: $Latest\n"

Here we are sending the Status header to prevent search engines from associating more than one url to the same content (this will give us a lower score in some search engines' systems) and then we send the Location header to do the actual redirect.

Lighttp and CGIs.
In other to execute this CGI we need to make some minor modifications to our VirtualHostost configuration. Lets add these two lines to it:
cgi.assign = ( ".cgi" => "/bin/bash" ) url.redirect =( "^/latest/(.*)" => "http://www.linuxevolution.org/latest.cgi")

In the first line we are telling lighttpd to use /bin/bash to execute any *.cgi file (you can change this to anything like *.sh, *.bash). In the second line we redirect all requests to /latest/ to the url /latest.cgi. You can either use /latest.cgi or /latest/ for these urls in your signature at the forums; personally I like to use /latest/ to keep track of where is my traffic coming from even if I don't get the HTTP referrer.

Spanish version: Un CGI en BASH para mantener tu firma al dia en todos los foros en que participas.

Lets take a look at this script, lets call it flickr2bbcode.sh

If you want to run this script you will need to pass the url of the set of photos that you want to publish, for example http://www.flickr.com/photos/tatadbb/sets/72157606893687387/ so your command line will look like this:

The out put of this command would be something like this:

Spanish version: De Flickr a BBCode.

In order for this to work you will have to create the 'latest' directory inside your root directory or modify the script.

In my case I have 2 websites, and this script keeps the '/latest/' directory pointing to the latest entry on each of them (http://linuxevolution.org/latest and http://orvtech.com/latest the spanish version of this website)

Spanish version: Un CGI en BASH para mantener tu firma al dia en todos los foros en que participas.

The output of this command will generate a list of files that are formatted as DOS files. ('’)

Spanish version: Encontrar archivos con formato MS-DOS.