Category Archives: linux

Installing Tamil fonts in Rosa Linux, Mandriva

As I was using Debian based flavours and redhat based Flavours I did not find any difficult in Installing fonts. As I have switched my home PC to Rosa linux R8.1 I was finding it difficult to Install tamil fonts. I have searched in Internet then I got to know about installing language. Below is to check whether the language exists

urpmq -a fonts-ttf-tamil

After checking this Exists then install using the below command

urpmi fonts-ttf-tamil

Once done you will see the language enabled in the browser.

Thank You

 

Beautify your terminal with screenFetch which is a Info tool

I have recently installed opensuse 42.2 gnome and making some changes. The changes were more about visual so I changed default theme as red arc theme and vivacious Icon theme then I changed color schemes in terminal and while searching I came accross this screenfetch.

Below is the screenshot

screenfetch-opensuse

 

How to uninstall linux from windows in dual boot

First download bootsect.exe into the Download directory.

press the windows key, type cmd.exe and on the result (The command prompt) start it as an “Administrator” by right clicking on the cmd icon, and select Run as Administrator.

In the new cmd.exe window, cd to your download directory. for example cd C:\Users\Lalu Patel\Downloads. _assuming your user name is “Lalu Patel”.

Then enter this command. bootsect.exe /nt60 ALL /force /mbr. Restart your system to see that, Windows is automatically loading without grub.

Then in Windows

  1. Open the Control Panel (All Items view), and click on the Administrative Tools icon. then close the Control Panel window
  2. Click on Computer Management in Administrative Tools, then close the Administrative Tools window.
  3. In the left pane under Storage, click on Disk Management. see this.
  4. Select the the partition with unknown type. it is the Ubuntu partition. Right Click -> Delete partition.
  5. Now the former Ubuntu partition becomes an unallocated space.
  6. Select the left partition of the new unallocated space.
  7. Right click on the partition -> click on Extend Volume.
  8. Click on the Next button.
  9. Type in how many MB (1 GB = 1024 MB) you want to use from the unallocated space to extend the selected partition (step 5) into, then click on the Next button.see this.

    Note: If you want to use all of the unallocated space to extend into, then type in the maximum available space shown for the unallocated space.

  10. Click on the Finish button. You’re done.

Source: bootsect, disk management

Error while mounting NTFS file system as read write

Below is the error which comes when trying to mount NTFS file system with read and write access

The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
Falling back to read-only mount because the NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no hibernation
or fast restarting.)

After searching I got what to do

Run the below command

$ sudo ntfsfix /dev/sda8

Now mount the file system read and write access by below command

$ sudo mount -o rw /dev/sda8 /media/user

 

How To: Enable High Quality Audio in Linux

We can handle 96KHz 24-bit audio – but by default pulseaudio and alsa are configured for 44.1KHz 16-bit audio. At the 44.1/16-bit settings everything sounds great, but I figure if the quality can go higher and I’m not fussy about a bit of extra CPU usage then I may as well bump the quality settings up a bit to take full advantage. Here’s how to do it:

1 – Check current settings

To see what your current settings are, you can either run the following for the full details:

Or to cut to the sample rates directly use:

Depending on how many sound devices are connected you should see something like this (in my example I have an Intel HDA internal soundcard as the first sink, and HDMI audio out as the second sink):

You might want to play an mp3 at this point and then look at the pulseaudio cpu usage via the top command so you can compare the current and HQ CPU usage as it might be a factor for you (i.e. depending on the spec of your PC, you might not want to sacrifice 10% or more CPU usage for higher quality audio – but seeing as you’re here and reading this I’ll assume that you are!). As a baseline, with the default settings pulseaudio uses around 2-3% CPU to play an mp3 on my Intel i7.

2 – Modify for high quality

Pulseaudio’s global settings are stored in /etc/pulse/daemon.conf, so edit that with your editor of choice and look for the following lines (the ‘resample-method’ line is above the default-sample-* lines btw – that is, they’re not all together as below):

These are the defaults, and are currently commented out (you can use either ; or # to indicate a comment). Uncomment each line and modify it to the below (or even better – just add an uncommented line below each one so you can still see the default values), so you end up with:

The Arch Audiophile Playback wiki recommends medium quality for resampling, you might want to try src-sinc-best-quality if you’re going for broke. A description of the libsamplerate resampling methods can be found here if you’re interested: http://www.mega-nerd.com/SRC/api_misc.html.

I get about 10% CPU usage on the pulseaudio daemon with 96KHz @ 24-bit audio with medium quality resampling as above, whilst using src-sinc-best-quality results in a rather significant 24% CPU usage just to play an mp3! ( It’s like having a Pentium 100MHz all over again! 😉 ) The ‘s24le’ means 24-bit samples, little-endian order, btw.

3 – Restart pulseaudio and check the settings

Now that’s done we need to restart the pulseaudio daemon (don’t run these as sudo – pulseaudio runs per user so just execute as normal!):

Once that’s done, you should be able to check the settings have taken by issuing:

It’s jumped up to 32-bit samples in this case, but that’s fine. Check the audio still works, and maybe have a look at the CPU usage when playing an mp3 via top again if you want to see how much this is affecting the CPU usage on your machine.

FiiO E17 Amp Check

Now that we’ve set higher quality default settings, if you’ve got some suitable hardware for them like the above-mentioned amp, plug that bad-boy in, switch it on – and it should validate that it’s getting the higher sample-rate and sample-depth:

Fiio E17 at 96KHz 24-bit via pulseaudio via USB (i.e. it’s acting as a sound card). The ’40’ value is just the current volume setting.

Sound Quality Differences

So – does changing these audio setting make a definite, perceivable difference to the audio quality? The short answer is yes!

How much it changes the audio quality is going to depend on your hardware (amp, headphones etc.) as well as the actual audio file(s) you’re playing on it. I don’t have any 24-bit audio to try it out on, but I rip everything at the highest possible quality VBR mp3s using lame – so I’ve been testing on the first track of Alt-J’s album (intro) with some Sennheiser HD650’s – and my honest answer? I’d go as far as to say it’s a strong yes (html joke ;-)). The high-frequency elements in particular seem a little brighter with the 96KHz 24-bit sampling, at least when run through the FiiO E17. Now, this could be placebo – that is, you expect something to sound different/react in a particular way so you look for it and (internally, subconciously) try to convince yourself of it. But I’ve honestly swapped back and forth and listed to the same track a number of times during the writing of this article and I genuinely believe it’s sounding better with the HQ settings.

Unfortunately, the schoolboy error I’ve made here is that I’ve changed two (if not three!) things at once: I’ve enabled the higher sampling-rate and sample-size/depth, but I’ve also modified the resampling algorithm to one of higher quality at the same time – so figuring out what elements of the audio sound better because of the audio settings and which are from the resampling-method (because I’m not playing native 96KHz @ 24-bit audio files to test with) can’t really be done. To get any real results I’d need to strip back to default settings and modify each in turn, doing listening tests with notes as I go, which frankly isn’t all that high up there on my priority list of things to do because…

Wrapup

…I’m delighted with the audio quality after these changes! It really does sound great =D

Ideally, I’d prefer to have things set to 44.1KHz on each audio device EXCEPT the Fiio – that way, when I’m playing games there’s minimal CPU used on the audio side (which isn’t really going to benefit that much from upsampling and such, I’d imagine) and then have the HQ settings for the FiiO only so that when I plug it to listen to music I get the HQ audiophile kick. However, my understanding is that I’d need to go into the alsa side of things to configure device specific settings – and again, it’s not really a high priority at the moment.

I’d love to hear what difference (or lack thereof!) any of you find when changing over to HQ audio (asides from the bump in CPU usage) – and if you run or have played with different samplerate/re-sample settings for diff devices I’d be especially interested! Cheers!

Installing tamil fonts in debian or debian based Distro

Installing tamil fonts in debian or debian based Distro

You can install any fonts by the below links

https://wiki.debian.org/Fonts

Now issue the below command in terminal

sudo apt-get install fonts-taml

sudo apt-get install ibus-m17n

After doing this Install ibus

sudo apt-get install ibus

Now after installing add the language. Enjoy

 

 

Improve sound quality by PulseAudio Configuration

To improve audio quality with pulseaudio present: Everything in a code box is done in a terminal

1) Make a backup of default settings:

Code:
sudo cp /etc/pulse/daemon.conf /etc/pulse/daemon.conf.old

2) edit the daemon.conf to use the best resampler and the highest quality sample format:

Code:
sudo nano /etc/pulse/daemon.conf

3) find the following:
resample-method =
default-sample-format =

4) change both to: (make sure to remove the “;” before default-sample-format)

Code:
resample-method = src-sinc-best-quality
default-sample-format = [S]float32ne[/S]

Here you should put the results from running pacmd list-sinks and the information found on the line called sample spec. The first piece of information should be the sample format your card will work best with. For my case the output was

Quote:

sample spec: s32le 2ch 44100Hz

thus my sample format is s32le. The float32ne is simply a generic method.

SECOND ISSUE: If you know that you will be using audio of a higher frequency (AKA something above 48KHz such as a Bluray HD audio track). Then you will likely want to change this area.

Code:
alternate-sample-rate = 48000

to this

Code:
alternate-sample-rate = 96000

This will prevent resampling of audio that is @96KHz but it will create resampling of any audio @48KHz. As of right now I have no idea if more than 2 default sample frequencies/rates can be used. So you’re stuck with the choice of of which you want to avoid resampling. In my experience most sources even Bluray tracks seem to top out at 48kHz so I’d say leave it at 48000.

5) FOR MORE THAN JUST 2 SPEAKERS
change this accordingly (make sure to remove the “;” before each setting)
3 for 2.1 aka 2 speakers and a sub and (While 3 for 2.1 is valid and supported most 2.1 speakers don’t work properly with such a setting so you should tinker with that to figure out what works best for you)so 6 would equal 5.1 and 8 would equal 7.1 (you’ll have to add the locational name of each speaker you have in the channel map to make it work properly)
(a generic 5.1 setup edit to your needs)

Code:
default-sample-channels = 6
default-channel-map = front-left,front-right,rear-left,rear-right,center,subwoofer

SIDE NOTE: You might want to experiment with swapping subwoofer with lfe to see which one sounds best for you and your specific sound hardware. But make sure your hardware can handle the lfe as it is noted on occasion the lfe can destroy speakers or subwoofers.

6) IF YOU WANT TO MESS WITH LATENCY
Lower these numbers as much as you can (at 0 pulse will no longer work and ALSA will be used instead) but be careful they may introduce problems and flash will likely become a problem or may not work at all.
Apparently I goofed up here…though this is purely subjective to each person; the recommended thing to do is set a higher fragment number and size. For me I personally have had better results (lower CPU usage) with as few fragments as pulse will allow me (in my case it was 2) and as large a fragment size as I felt necessary (I’m at 400 right now). The changes here are really up to you. This section has been a source of problems as there’s much misinformation out on the net. The safest bet outside of default is to use more fragments and a fragment size of 50 or greater. This however is a generic method. If you want to know how to figure out the specific for your configuration setup for this part of audio you’ll need to be ready to do some math and have a read from the steps laid out by these guys at the mint forum: http://forums.linuxmint.com/viewtopic.php?f=42&t=44862
One note is that you should use your info from running pacmd list-sinks and then follow steps 2-3 in the mint guide.

Code:
default-fragments = 1 (4 is default)
default-fragment-size-msec = 1 (25 is default)

6.1) IF YOU WANT TO TWEAK THE PRIORITY TO INCREASE QUALITY
Find “nice-level” and change it from the default -11 to a high negative (remember -20 is max and not recommended). Remember as usual to remove the ; before “nice-level”.

Code:
nice-level = -15 #this setting increases the frequency/share of CPU time that Pulseaudio has access to

SIDE NOTE: Not confirmed by anyone else yet but it seems changing the priority has a negative effect on KDE’s system sounds so they’ll cause a second or two of glitching/blocky/ugly sound if something else is using audio. No idea why but the priority change might negatively effect sounds from DEs such as Gnome, KDE. Doesn’t seem to cause problems with other applications using sound though. UPDATE: Skype is another thing that doesn’t like the nice level or latency changes. If you make changes similar to this then make sure not have anything trying to use the sound server at the same time as Skype as it’s again one program that just doesn’t play nice with others. It works perfectly fine if nothing else tries to use the sound card so don’t worry there.

IF YOU WISH TO AVOID PULSEAUDIO AND INSTEAD USE ALSA ALONE Warning: Spoiler! (Click to show)

Make the fragment section of the config look like this:

Code:
default-fragments = 0
default-fragment-size-msec = 0

It should be noted that this will negate any of the changes made prior to this point as this is a lazy way of getting rid of pulseaudio without having to actually uninstall pulse audio. It works by simply causing pulse not to load as this is an incorrect setting. Thus, pulse should no longer show up in your process list or return a follow from running

Code:
ps -A | grep "pulse"

. This means that ALSA will be in charge of everything and configuring it is a whole separate topic. However, it seems most people believe that one does not have to configure ALSA at all as it should “just work” by default so you shouldn’t need to do any config work with it.

An alternative and likely better way to disable Pulseaudio is to change the following in the /etc/pulse/client.conf file:

Code:
; autospawn = yes

to

Code:
 autospawn = no

7) exit and save changes

8) Next you need to kill pulse so the old config settings are no longer in effect

Code:
pulseaudio --kill

9) Then you should check that your config is valid

Code:
pulseaudio --check

10) If it returns nothing then your config is fine and you can restart pulse with your changes implemented

Code:
pulseaudio --start

NOTE: These changes may increase CPU load and the sample format may not be supported by the audio hardware on your mobo or card. Lower the number from 32 to 24 to 16 until it works. Otherwise use the original default setting. It should be noted that using a float setting will always result in lower CPU load and better sound quality.

Installing fedora tool groups in fedora 23

In fedora they have grouped packages according the needs like for an example if a person is interested in he has to download a distribution or he has to get a fedora lab of his choice for example Audio Editing or he can go for some other distro which has Audio Editing  tools and now he is also interested in security tools so he has to search all the tools and then he will install with audio editing tools. So to simplify this fedora provides group. So there are many groups users can get specialized tools in the groups.

Now type the below command to search the list of groups in fedora

$ dnf groups list

Now Install the needed group to your system by firing the below command

# dnf groups install “Security Lab”

Note: this command will not support the versions below fedora 21

Enjoy..

 

Changing the Prefix key of Tmux(Terminal Multiplexer)

Edit the file tmux.conf If it is a new Installation you will not have this file so create a new file in home directory by firing the below command

vi ~/.tmux.conf

Now enter the three lines for changing the default Ctrl-b to ` symbol as prefix key

unbind C-b

set-option -g prefix ‘`’

bind-key ‘`’ send-prefix

For this change to happen for all users write the config file to /etc folder so resulting your tmux file will be in /etc/tmux.conf

 

Opening eclipse with different JVM version

Sometimes we have a requirement that the eclipse has to be started by a different java version. So in order to do that we have to do that we have to edit the configuration file in eclipse.

Step 1 :

Open eclipse config file eclipse.ini in your Eclipse folder.

 

  • Add -vm yourPath\Java\jre6\bin\javaw.exe like in the screenshot below
  • Eclipse-ini-file-edit

Thank You