How to make Brother HL 2040 printer working under Linux?

Go to this link -> https://www.openprinting.org/printer/Brother/Brother-HL-2040

Click on the link "directly download PPD" which is underlined in green colour

PPD for Brother-HL-2040

Now in your linux machine (Debian based)
goto printer settings -> Select the "provide PPD" option -> Browse to the downloaded PPD file and "apply"

Check with the test print.

How to install Samsung SCX-4521-NS multifunction printer in Linux?

Steps to install drivers for SAMSUNG SCX-4521-NS multifunction printer

1. Download the driver file for linux from the following url

http://www.samsung.com/in/support/model/SCX-4521NS/XIP-downloads?downloadName=DR

2. extract the downloaded file then open Applications → Terminal

Assume that the downloaded file is in the directory ~/Downloads

3. Issue the following commands as in the same order

$cd ~/Downloads/uld

$./ install.sh

give proper values (mostly yes/no options) whenever prompted

4. Once the driver got installed, connect your printer with the PC/Laptop then do the following steps

5. Go to Applications → System tools → Administration → Printing this will open printer configuration wizard.  (Am Using a debian derived distro named BOSS GNU/Linux, in your destro the "Printing" may be available under different menu item, with different name)

6. Click on Add button, give password whenever prompted. The connected printer will be automatically detected and then click on Forward button. Now a new popup window will open select the option “provide ppd file”

7. Now browse to the location of ppd file (which is /usr/share​/ppd/uld-samsung)

8. Now select the ppd file with the exact name as “Samsung_SCX-4650_4x21S_Series.ppd”

then proceed.

9. Now, test your configuration with “print test page”

How to configure TVS Dot matrix printer in BOSS

1. Click on System -> Administration -> Printing.  Give root password if prompted, a GUI application will open.
2. Click on Server -> Add -> printer.  If your dot matrix printer is connected with your system then it will be automatically get detected, then click on the printer name and click the forward button.
3.  Now you can see the driver for your printer model
if so select and forward else select the Epson-150 driver(it is very generic driver supports most of the dot-matrix printer.)

Note:
Once your printer configured successfully you can share your printers with others(who are connected with your computer with LAN cord) easily.  For that you need to enable the shared option by System -> Administration -> Printing -> right click on the printer icon -> properties -> Policies -> tick mark on the option "Shared"

How to initialize sound in debian based Linux?

I met with this weird problem today, No sound output from my system with any player say banshee, totem etc... But yesterday it works fine. I checked all the sound settings in volume control it seems everything is perfect, but no sound output :(. Atlast i got the solution for this. Just give the following command in the terminal as root.

#alsactl init
The above command initializes the alsa sound card driver :). So after this audio works find

My audio driver is
:~$ lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 82801JD/DO (ICH10 Family) HD Audio Controller (rev 02)

My system's snd module details:
:~$ lsmod | grep snd
snd_hda_codec_realtek 163294 1
snd_hda_intel 16811 4
snd_hda_codec 46002 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 4054 1 snd_hda_codec
snd_pcm_oss 28671 0
snd_mixer_oss 10461 1 snd_pcm_oss
snd_pcm 47226 4 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_midi 3576 0
snd_rawmidi 12513 1 snd_seq_midi
snd_seq_midi_event 3684 1 snd_seq_midi
snd_seq 35463 2 snd_seq_midi,snd_seq_midi_event
snd_timer 12258 3 snd_pcm,snd_seq
snd_seq_device 3673 3 snd_seq_midi,snd_rawmidi,snd_seq
snd 34375 17 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 3450 1 snd
snd_page_alloc 5045 2 snd_hda_intel,snd_pcm

# <- Refers the root user in terminal
$ <- Refers the non-root user in terminal
Am using BOSS 4.0 Linux.