I tried to install the Ubuntu but had notice a problem twice and it will allow to get in to the desktop, but it appears the login to write a username and a password. I tried ignore it, put space, create a name, how can I login at first time? It happens because there was a problem during the installation? And how can I identify and solve this problem? I followed all the steps, burned a DVD with the Ubuntu system, boot the computer with the DVD, until the step to choose install or try (I chose install).
A username cannot contain white spaces and it must be a single word. A name can be your name [space] surname.
It is usually recommended to only use usernames that begin with a lower case letter or an underscore, followed by lower case letters, digits, underscores, or dashes. They can end with a dollar sign.In regular expression terms: [a-z_][a-z0-9_-]*[$]? On Debian, the only constraints are that usernames must neither start with a dash ('-') nor contain a colon (':') or a whitespace (space: ' ', end of line: '\n', tabulation: '\t', etc.). Note that using a slash ('/') may break the default algorithm for the definition of the user's home directory. Usernames may only be up to 32 characters long