Men-Njiplax

Thursday, 14 January 2021

How To Install Ubuntu Alongside Windows 10

Brief: This detailed article shows you how to dual boot Ubuntu with Windows 10, step-by-step, accompanied with proper screenshots.

Previously I had written about dual booting Ubuntu Linux with Windows 7 and 8, but those tutorials did not cover systems that come with Windows 10 pre-installed. The newer systems that come with Windows 8 or Windows 8.1, have UEFI instead of BIOS. This makes thing a little different from the conventional way of dual booting.

In this tutorial, we shall see how to install Ubuntu with Windows 10 already installed.

This tutorial is performed on a newly bought Dell Inspiron 7437 that has Core i7 fourth generation processor, 256 GB SSD, 8 GB RAM and built in 1 GB Intel graphics. I’ll cover all the steps you need to do in order to successfully dual boot Linux with Windows 10 UEFI. If you have already done some of these steps, just skip to the next one. If you have a fresh system, even better.

The steps mentioned here are applicable to other Ubuntu based Linux distributions such as Linux Mint, Elementary OS etc. Cutting the chit-chat, let’s see how to dual boot Linux on a UEFI secure boot enabled Windows 10 system.

Dual boot Ubuntu with Windows 10 and Windows 8.1:

Though I have used Ubuntu 14.04 here, it is applicable to all versions of Ubuntu, be it Ubuntu 15.10 or Ubuntu 16.04. There are various prerequisites to install Ubuntu on a UEFI system. I’ll list them for easier read here:

Ubuntu ISO burned to a USB or DVD (we’ll see it)
Windows backup (optional)
Windows 10 bootable USB (optional yet recommended as it will save your day if anything goes wrong)

Let’s see the steps of installing Ubuntu along side Windows 10.

Step 1: Make a backup [optional]

It is always nice to make a back up, just in case if you mess up with the system. There are numerous articles on the web to show you how to backup your system. You can follow this tutorial here.

Step 2: Create a live USB/disk of Ubuntu

The next thing you need to do is to create a live USB or disk. I recommend Universal USB Installer to create a live USB of Linux OS in Windows.

Read this screenshot tutorial to learn how to create a live USB of Ubuntu Linux in Windows.

Step 3: Make a partition where Ubuntu will be installed

Assuming tat you have a fresh system, the first thing we need to do is to make a partition to install Linux. The 256 GB in my system was already had several partitions from manufacturer but mainly for backup and other purposes. Main partition was C drive, of around 220 GB, where Windows 8.1 was installed.

If you have just one partition like this, you need to make some free space out of it for Linux. If you have several partitions of considerable size, use any of them except C drive because it may erase the data.

To make a partition in Windows 8, go to Disk Management tool. You can find disk management tool by searching for ‘disk’ in Control Panel.

In the Disk Management tool, right click on the drive which you want to partition and select shrink volume. In my case, I shrank the C drive to make some free space:

You can leave the free space as it is. We shall use it while installing Ubuntu.

Step 4: Disable fast startup in Windows [optional]

Windows 8 introduced a new feature called “fast startup” for quick boot. While it is not mandatory, it would be better to have it disabled.

Go to Control Panel > Hardware and Sound > Power Options > System Settings > Choose what the power buttons do and uncheck the Turn on fast startup box.

If you need more hints, follow this screenshot tutorial to disable fast startup in Windows.

Step 5: Disable secureboot in Windows 10 and 8.1

This is the most important step. The new secure boot feature of Windows 8, originally intended for security feature for rootkit viruses, prevents dual booting of Windows with Linux. To dual boot Windows 8 with Linux, we must disable secure boot in UEFI.

It is better that you follow this screenshot guide to disable secure boot in Windows 10 Windows 8.1.

Step 6: Installing Ubuntu along with Windows 10, 8.1

Once you have disabled secure boot, it’s time to install Ubuntu. I hope you already created the live USB as mentioned in step 2. Plug in the USB and boot the system from it.

To boot from USB, will have to choose boot from USB option from within Windows itself. Either with PC Setting (like for UEFI) or pressing shift key while clicking on Restart.

Once you have booted in the live USB, you will be presented with option to try or install Ubuntu. Click on install. You will be presented with few screen options to choose the language. It will then do some checks on available space, power and internet connection etc. Just click on Continue.

The main screen which you should pay attention to is Installation Type. Choose Something else here:

Remember we had created some free space beforehand? We shall use the free space to create Root, Swap and Home. Select the free space and click on the + sign.

It will provide you with option to create Linux partition. We are creating the Root partition. Any thing above 20 GB is more than sufficient for it. Choose the size, select Ext 4 as file type and / (means root) as the mount point.

Clicking on OK in previous step will bring you to the partition screen. Next we will create swap. Like previously, click on the + sign again. This time use the file type as Swap area. Suggestible swap size is double of RAM.

In similar fashion, create a Home partition. Allocate it maximum space (in fact allocate it rest of the free space) because this is where you’ll save music, pictures and downloaded files.

Once you are ready with Root, Swap and Home, click on Install Now:

Well, you have almost won the battle. You can smell victory now. Next you will be asked to set username password etc. Basically, you just need to click next now.

Once the installation is completed, restart the computer, you should be welcomed by a purple grub screen. Enjoy Ubuntu along with Windows 10 in dual boot mode.

Note: If after installing Ubuntu, you boot directly in Windows, check in UEFI settings for changing the boot order.

I hope this guide helped you to dual boot Ubuntu with Windows 10 UEFI. If you want to reverse the process, follow this guide to remove Ubuntu from dual boot with Windows. Though this article is written for Ubuntu, it should be helpful for other Linux OS as well. Any questions or suggestions are always welcomed.

Source : https://itsfoss.com/install-ubuntu-1404-dual-boot-mode-windows-8-81-uefi/

Thursday, 17 December 2020

[Solved] CredSSP Encryption Oracle Remediation

A remote code execution vulnerability exists in the Credential Security Support Provider protocol (CredSSP). An attacker who successfully exploited this vulnerability could relay user credentials and use them to execute code on the target system.

CredSSP is an authentication provider which processes authentication requests for other applications; any application which depends on CredSSP for authentication may be vulnerable to this type of attack.

As an example of how an attacker could exploit this vulnerability against Remote Desktop Protocol, the attacker would need to run a specially crafted application and perform a man-in-the-middle attack against a Remote Desktop Protocol session. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The security update addresses the vulnerability by correcting how Credential Security Support Provider protocol (CredSSP) validates requests during the authentication process.

1. SCENARIO

2. RDP SESSION

An update released by Microsoft (KB 4093492)on May 8, 2018, for Windows 10 Operation System was targeted to change the default settings CredSSP from Vulnerable to Mitigated.

A full list of the update and patches for all platform can be obtained from here.

However, post patching this caused an issue where the patched clients were blocked from communicating with unpatched servers over RDP protocols.

This has been reported to cause an error thrown by Windows RDP as below:

[Solved] CredSSP Encryption Oracle Remediation

Discover a new world of sustainable, trusted cloud infrastructure with Modern Enterprise Data Center

3. WORKAROUND

Use the group policy settings changes described below to rollback the changes to ‘Vulnerable’ state to allow RDP access.

1. Open Group Policy Editor, by executing gpedit.msc

2. Policy path: Computer Configuration -> Administrative Templates -> System -> Credentials Delegation

Run gpedit.msc and expand Administrative Templates

Expand System

Expand Credential Delegation

Edit Encryption Oracle Remediation

Select Enabled and change Production Level to Vulnerable

3. Run the command gpupdate /force to apply group policy settings.

4. Your remote desktop connection will be working fine now.

CONCLUSION

This is just a workaround and defeats the purpose of the patching. However, we need to ensure that future updates are installed as and when released by Microsoft so that the vulnerability is not exposed.

Tags

Cloud Infrastructure and Management, CredSSP, Oracle remediation, Remote connection, Remote Desktop, Windows Update

Source : https://www.netwoven.com/2018/05/15/solved-credssp-encryption-oracle-remediation/

Saturday, 12 December 2020

Remote Desktop Client Ubuntu

apt-get install freerdp2-x11 -y

xfreerdp /u:user /p:sapi25 /w:1600 /h:900 /v:202.152.140.37 /smart-sizing

Tuesday, 8 December 2020

Cara upgrade kartu XL 3G yang lama ke 4G

Cara upgrade kartu XL 3G yang lama ke 4G, dapat dilakukan sendiri tanpa perlu ganti nomor. Selengkapnya, akan dijelaskan pada artikel teknoding kali ini.

Bagi kalian user atau pengguna, yang menggunakan operator seluler XL Axiata. Kalian mungkin mempunyai perangkat HP, atau smartphone Android yang mendukung jaringan 4G. Namun kartu XL kalian masih yang lama, dan masih menggunakan jaringan 3G.

Nah, karena syarat utama agar kita dapat menikmati jaringan 4G. HP atau Smartphone kita harus mendukung 4G, dan juga menggunakan kartu XL 4G. Maka kita perlu melakukan langkah Upgrade Kartu XL 3G ke 4G.

Tenang saja, kalian tidak perlu repot-repot ke XL Center untuk sekedar upgrade saja, yang memakan ongkos dan waktu. Dengan menggunakan teknologi OTA (over the air), kalian bisa upgrade kartu XL 3G ke 4G secara mandiri.

Serta kita juga tidak perlu ganti nomor, kita cukup beli nomor kartu XL baru, lalu kita gantikan dengan nomor kartu yang lama. Sehingga kuota, pulsa, kontak di nomor kartu XL yang lama tidak akan terhapus.

Kali Teknoding akan membagikan beberapa langkah, tentang cara upgrade kartu XL 3G ke 4G tanpa perlu ganti nomor HP :

Cara Upgrade Kartu XL 3G ke 4G Tanpa Ganti Nomor

Daftar Isi SHOW

Berikut cara upgrade kartu XL ke 4G :

Langkah pertama untuk upgrade kartu XL 3G ke 4G, kita beli nomor kartu XL baru, di konter terdekat yang harganya sekitar Rp 5.000 atau Rp 10 ribuan.
Selanjutnya, kalian ketikan, atau tekan *123*46#, di smartphone atau hape android kalian. Lalu pilih Call.

Kemudian, pada menu penukaran SIM card 4G.
Kalian pilih 1 (Lanjutkan), dengan menekan tombol 1.
Lalu pilih tombol Mengirim.

Menu Penukaran SIM Card 4G XL axiata android — Menu Penukaran SIM Card 4G

Tunggu beberapa saat, sampai kalian menerima kiriman sms dari XL-4G.
Seperti pada gambar di bawah :

SMS dari XL-4G untuk ugprade kartu xl 3g ke 4g tanpa ganti nomor — SMS dari XL-4G

Sekarang kita ikuti perintah kiriman SMS dari XL-4 , dengan mematikan smartphone atau hape android kalian.
Lalu mencabut SIM card lama kalian, dengan mengganti SIM card baru, dari nomor kartu XL yang baru saja dibeli.
Kemudian kita nyalakan kembali jika sudah.
Jika terdapat perintah untuk registrasi nomor kartu XL, kalian bisa abaikan jika nomor kartu XL kalian sudah terdaftar.
Untuk mengeceknya kalian bisa ketikan *123*4444#.
Selanjutnya , kita ulangi lagi seperti langkah no 2 dan 3 , dengan mengetikan *123*46# , di smartphone atau hape android kalian.
Pilih 1 dengan menekan tombol 1, lalu pilih tombol Mengirim.
Tunggu beberapa saat, kalian akan menerima kiriman SMS dari XL-4G lagi. Seperti pada gambar di bawah :

Ikut perintah seperti yang ada di kiriman sms dari XL-4G , yaitu dengan merestart smartphone atau hape android kalian.
Nantinya akan ada 2 kiriman sms lagi dari XL-4G, yang memberi tahu kalian bahwa, proses akvitasi kartu XL 4G kalian telah berhasil.
Selesai, sekarang kalian tinggal mengganti mode jaringan 3G menjadi LTE , lewat pengaturan di smartphone atau hape android kalian.

cara upg

Source : https://teknoding.com/cara-upgrade-kartu-xl/

Convert mkv to mp4 in terminal

ffmpeg -i foobar.mkv -vcodec copy -acodec copy foobar.mp4

How to Install and Use FFmpeg on CentOS 7

FFmpeg is a free and open-source collection of tools for handling multimedia files. It contains a set of shared audio and video libraries such as libavcodec, libavformat, and libavutil. With FFmpeg, you can convert between various video and audio formats, set sample rates, capture streaming audio/video, and resize videos.

This tutorial walks you through installing FFmpeg on CentOS 7.

Prerequisites

To be able to add new repositories and install packages on your CentOS system, you must be logged in as a user with sudo privileges .

Installing FFmpeg on CentOS 7

FFmpeg is not available in CentOS 7 core repositories. You can choose to build the FFmpeg tools from the source or to install it via yum from a third-party Yum repository.

We’ll go with the second option and install from the RPM Fusion repository:

The RPM Fusion repository depends on the EPEL software repository. If the EPEL is not enabled on your system, enable it by typing:
```
sudo yum install epel-release
```

Next, enable the RPM Fusion repository by installing the rpm package :

sudo yum localinstall --nogpgcheck https://download1.rpmfusion.org/free/el/rpmfusion-free-release-7.noarch.rpm

Once the repository is enabled, install FFmpeg:
```
sudo yum install ffmpeg ffmpeg-devel
```
Verify the FFmpeg installation by checking its version:
```
ffmpeg -version
```
At the time of writing this article, the current version of FFmpeg available in the RPM Fusion repository is 3.4.7:
```
ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
...
```

That’s it. FFmpeg has been installed on your CentOS machine and you can start using it.

FFmpeg Examples

In this section, we will look at some basic examples on how to use the ffmpeg utility.

Basic conversion

When converting audio and video files using ffmpeg, you do not have to specify the input and output formats. The input file format is auto-detected, and the output format is guessed from the file extension.

Convert a video file from mp4 to webm:
```
ffmpeg -i input.mp4 output.webm
```
Convert an audio file from mp3 to ogg:
```
ffmpeg -i input.mp3 output.ogg
```

Specifying codecs

You can specify the codecs you want to use with the -c option. The codec can be the name of any supported decoder/encoder or a special value copy that simply copies the input stream.

Convert a video file from mp4 to webm using the libvpx video codec and libvorbis audio codec:
```
ffmpeg -i input.mp4 -c:v libvpx -c:a libvorbis output.webm
```
Convert an audio file from mp3 to ogg encoded with the libopus codec.
```
ffmpeg -i input.mp3 -c:a libopus output.ogg
```

Conclusion

We have shown you how to install FFmpeg on CentOS 7 machines. You can now visit the official FFmpeg Documentation page and learn how to use FFmpeg to convert and your video and audio files.

If you hit a problem or have feedback, leave a comment below.

Source : https://linuxize.com/post/how-to-install-ffmpeg-on-centos-7/

Cara Mudah Menampilkan Video di Web dengan HTML5

Masih repot menampilkan file video di halaman web? Kini tidak lagi. Kalau dulu, kita membutuhkan script video player, seperti Flow Player, atau yang lain untuk menampilkan video dan memutarnya di halaman web Anda. Namun kini dengan HTML5, Anda cukup mengupload file videonya saja ke hosting atau web server, lalu membuat tag HTML saja, dan selesai.

Wah mudah banget ya??

So… Bagaimana bentuk tag untuk menampilkan file video ke halaman web dengan HTML5? caranya cukup mudah, cukup membuat tag HTML sebagai berikut:

<video width="..." height="..." controls>
  <source src="namafilemovie" type="mimetype">
</video>

dimana atribut ‘width‘ untuk menentukan panjang frame video playernya (dalam satuan pixel); ‘height‘ menentukan lebarnya (pixel); ‘controls‘ untuk menampilkan panel control pada frame video playernya seperti pengatur volume, full screen, seek bar dll; ‘src‘ untuk menentukan file video yang akan ditampilkan (bisa ditulis dalam bentuk URL); ‘type‘ untuk menentukan mime type dari file video tersebut.

Perhatikan contoh berikut ini ya

<!DOCTYPE html>
<html>
<body>
<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
</video> 
</body>
</html>

Penampakan dari kode di atas pada browser adalah sbb:

Web Video Player dengan HTML5

NB: Jangan lupa menuliskan <!DOCTYPE html> pada bagian paling atas HTML Anda, karena kode tersebut merupakan penciri dari HTML5.

Anda dapat mengatur sendiri panjang dan lebar frame videonya, atau menghilangkan/memunculkan controls nya. Lalu format file video apa saja yang disupport HTML5? Format file video yang disupport adalah: *.mp4 (mime type: video/mp4), *.webm (mime type: video/webm), *.ogg (mime type: video/ogg).

Terkadang pula tidak semua jenis browser mensupport ketiga jenis file tersebut, misalnya browser IE dan SAFARI hanya bisa mensupport *.mp4 saja, atau OPERA hanya mensupport *.ogg dan *.webm saja. Sedangkan untuk CHROME dan Firefox mensupport ketiganya.

Penulisan tag <video> bisa juga seperti di bawah ini:

<!DOCTYPE html>
<html>
<body>
 
<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>
 
</body>
</html>

Apa maksud kode di atas? Maksudnya adalah memberikan alternatif format file video. Jika browser yang digunakan mensupport *.mp4, maka file ‘movie.mp4’ yang akan dijalankan. Apabila tidak support, maka yang akan dijalankan ‘movie.ogg’. Sedangkan apabila keduanya tidak disupport maka akan muncul pesan ‘Your browser does not support the video tag.’. Jika Anda membuat kode seperti di atas, maka tentu saja Anda harus mengupload file ‘movie.mp4’ dan ‘movie.ogg’ ke server web.

Dengan HTML5, kita juga bisa membuat tombol Play, Pause, Reload sendiri untuk mengatur jalannya video. Untuk melakukan hal ini, kita menggunakan javascript. Perhatikan contoh berikut ini:

<!DOCTYPE html> 
<html> 
<body> 
 
<button onclick="playVid()" type="button">Play Video</button>
<button onclick="pauseVid()" type="button">Pause Video</button>
<button onclick="reloadVid()" type="button">Reload Video</button> 
<br> 
<video id="video1">
  <source src="mov_bbb.mp4" type="video/mp4">
  <source src="mov_bbb.ogg" type="video/ogg">
  Your browser does not support HTML5 video.
</video>
 
<script> 
var myVideo=document.getElementById("video1"); 
 
function playVid()
{ 
  myVideo.play(); 
} 
 
function pauseVid()
{ 
  myVideo.pause(); 
} 
 
function reloadVid()
{ 
  myVideo.load(); 
}
</script> 
 
</body> 
</html>

Keterangan:

Untuk menjalankan video, cukup panggil dengan method play(), untuk mempausenya dengan method pause(), dan untuk mereload video gunakan load().
Perhatikan kode di atas, untuk tag videonya diberi id=”video1″. ID ini nanti akan digunakan untuk proses pemanggilan elemen di javascriptnya, yaitu myVideo=document.getElementById("video1")

Tampilan dari kode di atas adalah sbb:

Web Video Player dengan HTML5

Mudah bukan membuatnya? selamat mencoba dan semoga bermanfaat. Untuk referensi lebih lengkap, Anda bisa mempelajarinya di w3schools.com.

Jika pakai subtittle VTT

<video width="1280" height="720" controls autoplay>
    <source src="somefile.mp4" type="video/mp4">
    <track default src="somefile.vtt" kind="captions" srclang="de" label="Deutsch">
</video>

Converter srt to vtt online

https://atelier.u-sub.net/srt2vtt/

Source : https://blog.rosihanari.net/cara-mudah-menampilkan-video-di-web-dengan-html5/