How to validate Libre Office on Mac

For a peace of mind, spend a minute to validate the downloaded file from internet.

Get information from https://download.documentfoundation.org/libreoffice/stable/7.0.4/mac/x86_64/LibreOffice_7.0.4_MacOS_x86-64.dmg.mirrorlist

File information
Filename: LibreOffice_7.0.4_MacOS_x86-64.dmg
Path: /libreoffice/stable/7.0.4/mac/x86_64/LibreOffice_7.0.4_MacOS_x86-64.dmg
Size: 252M (263941643 bytes)
Last modified: Fri, 11 Dec 2020 23:57:25 GMT (Unix time: 1607731045)
SHA-256 Hash: 0fcd83399609780013aee1acc805d1380434118d459829908aa409f7eb67c4e7
SHA-1 Hash: 443de571dad8e412e8b9e4be52ad5b249cc2627f
MD5 Hash: a36fd3c1d5e8935e4732cbf0f826a821
BitTorrent Information Hash: 636f6abbb3ed784831da6385686b1577538e8a39
PGP signature available

Run this command on MacBook: 
openssl dgst -sha256 LibreOffice_7.0.4_MacOS_x86-64.dmg
SHA256(LibreOffice_7.0.4_MacOS_x86-64.dmg)= 0fcd83399609780013aee1acc805d1380434118d459829908aa409f7eb67c4e7

Compare this SHA256 value against with value got from LibreOffice web site above.

Install Eclipse on Mac OS/X

After I upgraded my MacBook Pro from OS/X 10.7 "Lion" to OS/X 10.9 "Mavericks", many my applications did not work correctly so I uninstalled them. Install Eclipse IDE on Mac OS/X is simple, just extract the zip file and you are all set.

How do I put Eclipse icon on launchpad?
Move whole Eclipse folder to your Applications folder

What did I do last weekend?

Look at this picture :)

I played with Microsoft ASP.NET MVC 4, Visual Studio 2012 on Windows 8. Actually Windows 8 hosted on my Apple MacBook Pro. On my Dell laptop, I used Google Chrome on Ubuntu. I love to learning a new thing everyday.

Compare Files and Folders

In Linux or Mac OS/X, using diff command at the terminal.

To compare two folders:
diff -rq folder1 folder2

To compare two files:
diff file1 file2
diff 'first file' 'second file'

For more options:
diff --help

For Microsoft Windows computer, use WinMerge, an open source software, to compare and merge files and folders.

Should Developer Tools Free?

Last week, Microsoft announced the next free version of Visual Studio 2012 (or Visual Studio 11) will not free for develop desktop applications. "To create desktop apps in Visual Studio 2012, you need to use Professional 2012 or higher." Other Express versions used to develop Metro, web or mobile applications still free. It's not a good decision. After a strong objection from developers, Microsoft reversed its early plan.

Actually, I do not care whether Microsoft provides free tools for developer or not. If I need a tool, my company will pay for that. The last time, I developed Windows desktop applications twelve years ago. After that, I spent most my time for web applications. Now, I'm learning to develop mobile application in my spare time. 

I'm enjoy to use free and open source development tools such as Eclipse IDE, MonoDevelop, gedit, Notepad++, WinMerge, Git, Apache, PHP, MySQL, Sqlite, Python, Ruby, JavaScript... for both web and mobile developments in Ubuntu Linux and Microsoft Windows environments. If I need to develop in Mac platform, I can get Xcode 4 for free from Mac App Store. 

Today, it's not make sense to charge developer or anyone interest in programming for development tools. 

My Next PC

My next Personal Computer (PC) will be a Mac. The first PC I used was an Apple computer, Apple II, when I was in college. After a quarter of a century using Microsoft Operating Systems (DOS, Windows), I'm switching to Linux. I'm so happy with Ubuntu and Open Source applications. I pick Mac not because it's better than Microsoft Windows PC or Linux PC. Mac is so expensive! The lowest MacBook is $999 while the you can get the Microsoft Windows PC for about $400. With a MacBook Pro, I can program or test number of difference projects: iPhone mobile applications, Android mobile applications, PHP web-based applications, Python programs, mySQL,... Using VirtualBox on MacBook Pro, I can run Windows and Linux applications on guest machines. I must buy a Mac machine because Mac/OS license is not allow to run on virtual machine. It must run on Apple hardware.