How to setup keyboard to type other languages on Mac

Extract from https://support.apple.com/en-vn/guide/mac-help/mchlp1406/mac for reference:

1. On your Mac, choose Apple menu  > System Settings, then click Keyboard  in the sidebar. (You may need to scroll down.)
2. Go to Text Input, then click Edit. 
3. Click the plus sign (located at the end on left corner), then search for a language (such as Chinese, Simplified). Select one or more input sources for each language you want to use. 
4. Click Add.
5. To begin writing in another language, select the language you want to use in the Input menu in the menu bar.

How to Verify the Integrity of the Downloaded Keka the macOS file archiver

Go to https://www.keka.io/en/

Download v1.2.58
36.4 MB | Requires Mac OS X 10.10 or newer
Changelog | Legacy | Helper | iOS
MD5: 316c2614330f6a9bf8776eb312c6d54f

$ openssl dgst -md5 Keka-1.2.58.dmg
MD5(Keka-1.2.58.dmg)= 316c2614330f6a9bf8776eb312c6d54f

Is the hash match?

Source code https://github.com/aonez/Keka

Open Source Applications to Find Duplicates Files

https://github.com/antikmozib/Dupe-Clear
C#
A duplicate file cleaner for Windows.
mozib.io/dupeclear
License GPL-3.0 license
25 stars
2 watching
4 forks
Releases 2
Dupe Clear v2.0 Latest
on May 8, 2021

https://github.com/arsenetar/dupeguru
dupeGuru is a cross-platform (Linux, OS X, Windows) GUI tool to find duplicate files in a system. It is written mostly in Python 3 and uses qt for the UI.
dupeguru.voltaicideas.net
python deduplication
GPL-3.0 license
2.7k stars
86 watching
298 forks
Releases 6
4.2.1 Latest
on Mar 26
+ 5 releases

How to show emoticon on MacBookPro

With text box on focus, press three keys together ⌃-⌘-Space Bar (Control-Command-Space Bar)

Validate integrity of LibreOffice downloaded files on Mac

On this page https://www.libreoffice.org/download/download/, click info
https://download.documentfoundation.org/libreoffice/stable/7.2.1/mac/x86_64/LibreOffice_7.2.1_MacOS_x86-64.dmg.mirrorlist

Mirrors for LibreOffice_7.2.1_MacOS_x86-64.dmg
File information

Filename: LibreOffice_7.2.1_MacOS_x86-64.dmg
Path: /libreoffice/stable/7.2.1/mac/x86_64/LibreOffice_7.2.1_MacOS_x86-64.dmg
Size: 267M (279867887 bytes)
Last modified: Fri, 10 Sep 2021 09:43:36 GMT (Unix time: 1631267016)
SHA-256 Hash: b83e841360fa6ee9e42bfc1579ce9ae135972d6e7a01e79d1b975c2b855ff152
SHA-1 Hash: ad46a513f7c2047f632d8a3929a23b74aaebcc3d
MD5 Hash: 741cd9f35e133d0b2cc1944dc362cb0f
BitTorrent Information Hash: bcb717c49259229b9108c0967679dc2f53c9aba9
PGP signature available

At the terminal:
$ openssl dgst -sha256 LibreOffice_7.2.1_MacOS_x86-64.dmg
SHA256(LibreOffice_7.2.1_MacOS_x86-64.dmg)= b83e841360fa6ee9e42bfc1579ce9ae135972d6e7a01e79d1b975c2b855ff152

Search and compare the hash sum for matching before install

Free Windows 10 Upgrade

As I guessed in my post last year, the next version of Windows is a free upgrade to consumer of Windows 7, 8, and 8.1. I love it.

MAC – Easy to Use?

Refresh:

• Windows: F5
• Ubuntu: Ctrl-R
• Mac: ?

Create a new text file.

• Windows: Right click
• Ubuntu: Right click
• Mac: ?

Connect to Windows Share from Ubuntu

When I attempted to connect to Windows Share from Ubuntu 12.04, I got this error message: "Failed to retrieve share list from server"

Found solution from UbuntuForums.org (http://ubuntuforums.org/showthread.php?t=1082148&page=12&p=9762937#post9762937). Enter "smb://192.168.123.123" where 192.168.123.123 is the IP address of Windows Share, it bring up the list of shared folders on Windows machine.

Now, I just entered the user name and password to get in.

How to access Wamp Server running on Windows 2008 from other computer?

The firewall rules on Windows 7 or Windows 2008 or later version may not allow you access to your web site running by WampServer from other computer. To fix this problem:

Step 1: Update httpd.conf to add this line
Allow from 192.168.1.0/255.255.255.0 # for LAN
#or
Allow from all # for any computer in the world
Remember to restart Apache server after change the httpd.conf

Step 2: Check Windows Firewall.

• Is the port 80 open?
• Is the Apache Web Server (\wamp\bin\apache\Apache2.4.4\bin\httpd.exe allow to receive the request from other?

Install Windows 8.1 Preview on VirtualBox

When I installed Windows 8.1 Preview on VirtualBox 4.2.14 hosted on Mac OS/X machine, I got this error:
“Your PC need to restart, Please hold down the power button Error Code : 0x000000C4”.

Here is a solution I found at https://www.virtualbox.org/ticket/10792:
Open terminal windows and execute this command:
VBoxManage setextradata [vmname] VBoxInternal/CPUM/CMPXCHG16B 1
where [vmname] is your Windows 8.1 virtual machine name.

Here is my screenshot: Install Visual Studio 2013 Preview on Windows 8.1 Preview

Update on July 10: You need to the Oracle VirtualBox 4.2.16 or later to install VirtualBox Addition in order to make the full screen, shared folder and other features.

Scan a whole drive for virus in Windows 8

1. Go to desktop screen to using Windows Explorer or open command prompt windows.
2. Change to folder C:\Program Files\Windows Defender
3. Execute program c:msascui.exe

Antivirus on Microsoft Windows 8

Microsoft Windows 8 has built-in antivirus software called Windows Defender so we don’t need to install Microsoft Security Essential as in Microsoft Windows 7 or previous Windows version. If you need to install other third party antivirus software such as Norton Antivirus or McAfee, etc… you need to disable Windows Defender first. You cannot more than one antivirus software run at the same time. It will slowdown your machine and make it easy to crash.

I am much happy to use the Windows Defender on Microsoft Windows 8. It saves me at least fifty bucks per year on antivirus software.

New Year New Password

Your password should change frequently. If you cannot change every month, every quarter, then at least once a year.

When you change the password, it should NOT in "The 25 worst passwords of 2012". You should NOT using the same password for all accounts. Use the KeePass or a password protected LibreOffice document to keep track your password. Read "The guide to password security (and why you should care)" for more info.

Happy New Year!

Beware of Fake Federal Express Emails

When I maintained my client's computer few days ago, I found his computer infected by trojan downloader Win32/Kuluoz.B

These trojans infected my client's computer since he clicked on the fake email claimed from Federal Express.

As a matter of fact, the delivery companies like Federal Express, UPS, DHL and US Post Office never send email notification. They don't know your email. If they cannot delivery package, they will left a note at your door.

It took me an hour to clean up and re-scan whole computer to make sure it clean. So, beware when you check email.

Reinstall Guest Additions on Ubuntu Virtual Machine

Each time Ubuntu virtual machine running on Apple Mac OS/X host machine upgraded to new kernel or major upgrade, Oracle VM VirtualBox Guest Additions need to re-install. Also, it need to upgrade when Oracle VM VirtualBox upgrade to new version.

Windows 8 Preview on VirtualBox

Microsoft Windows 8 Consumer Preview or Enterprise Preview will run perfectly on VirtualBox virtual machine. However, after I installed VirtualBox Guest Additions, Microsoft Windows 8 Preview did not run correctly. I could not open my email client or desktop. So, I wiped out the virtual machine and start over without install Guest Addition.

How to show hidden files in Mac OS X

To show hidden files in Mac OS X:
1. Open terminal
2. Type the following command turn show hidden files:
defaults write com.apple.Finder AppleShowAllFiles true
3. Restart the Finder application by this command
killall Finder

To hide the hidden files, replace the 'true' value with 'false' in command at step 2 above

Quickly Lock Your Screen using Keyboard

To quickly lock your computer using keyboard shortcut:

1. On Ubuntu: Press <Ctrl><Alt>L at the same time 
2. On Apple OS/X: Press <Shift><Ctrl><Eject> keys at the same time 
3. On Microsoft Windows: Press <Windows> and L keys at the same time 

Unity Launchpad error in Ubuntu 12.04 LTS (Precise Pangolin) Beta 1

In the last couple days, I encountered the Unity Launchpad error in Ubuntu 12.04 LTS (Precise Pangolin) Beta 1. I got the error dialog box displayed, closed it, got a blank screen, nothing there. No launchpad.

How I got into the terminal or launched the application? How I fixed it?

Launched the keyboard shortcut by pressed these keys together <Ctrl><Alt>T

Now in the terminal, I ran these commands:
~$ sudo apt-get update
~$ sudo apt-get upgrade

I thought the new updates would fix it. Still no launchpad. I typed this command at the terminal
~$ unity

The launchpad launched. Still some glitches. Reboot. Repeated these processes above couple times, it worked.

Automatically Show and Hide Dock Bar on MacBook Pro

By default, the dock bar always show on MacBook Pro. It consume a lot of space on screen. To make it automatically hide and show:

1. Right click the middle space between icon, go to dock preferences.

2. Check automatically hide and show the Dock

or
Click on the Apple icon on the top left screen to access Dock preferences

or really quick: Press <option><command><command>D keys at the same time to turn on/off the automatically hide and show the Dock