apt-get extremely slow to resolve domains?

It's probably trying to do DNS resolution through ipv6 which is not configured. You can edit

/etc/gai.conf 

and add the line

precedence ::ffff:0:0/96  100

to the end of the file. This way DNS lookups are done with ipv4 prioritized over ipv6.

"Failed to connect to connect to FTP server" issue (Wordpress)

I set up a Wordpress installation on my web server. As soon as I tried to install a new theme/plugin, I got the message "Failed to connect to FTP server mydomain.com:21". I was certain that the address and login credentials where correct since I could connect to my FTP server with an FTP client (Filezilla).

I proceeded to set my wp-content folder's permissions to 755, as well as it's contents with:

chmod -R 755 /var/www/mywordpressfolder/wp-content/

I then changed ownership of the wp-content folder and its contents to the www-data user (apache user/group).

chown -R www-data /var/www/mywordpressfolder/wp-content/

This solved my issue. Needless to say, change mywordpressfolder with where your wordpress installation is. If your installation is not in a folder just use /var/www/wp-content/. If you get a "Permission denied/Operation not permitted" message, you probably omitted using "sudo" in front of the command.

Disable special characters Mac OSX such as á ä é ë (single-double quote/vowel)

Go to System Preferences -> Language and Text -> Input sources. Deselect U.S International, and select U.S.
Done.

Solve "Standard Mode: Fault outside of MS-DOS Extender." in virtualbox

I got this error when trying to install Windows 98 in Virtualbox.

Just uncheck these options:

• "Enable VT-x/AMD-V" and 
• "Enable PAE/NX"

Source

Toshiba bios "Yes" string

If a Toshiba Qosmio bios asks for a key string in order to make a setting change, press: 1234 [ENTER].

Error 0x80072f8f when trying to activate MS Windows

Just fix the date/time in Windows, either by syncing with a time server, or manually.

After successful update: "An automated WordPress update has failed to complete"

Just navigate to your wordpress directory via ftp and delete the ".maintenance" file. Only do this AFTER you have successfully updated wordpress.