The statistics shows that, this is a legal form. In many languages as in my native language - Bulgarian  - it is possible to ask a question in general form - without personal pronoun. Apparently these are the reasons why 2 of my 4 questions begin with "How to..." :)

<pre>
+--------------------------------------------------------+
| Stack Exchange | Questions # | How to Q # | How to Q % |
+----------------+-------------+------------+------------+
| Unix & Linux   |    124,443  |    <a href="https://unix.stackexchange.com/search?tab=votes&q=title%3a%22how%20to%22">17,855</a>  |    14.3 %  |
| Stack Overflow | 14,598,565  | <a href="https://stackoverflow.com/search?tab=votes&q=title%3a%22how%20to%22">1,966,679</a>  |    13.5 %  |
| Ask Ubuntu     |    272,812  |    <a href="https://askubuntu.com/search?tab=votes&q=title%3a%22how%20to%22">33,412</a>  |    12.2 %  |
| Server Fault   |    249,373  |    <a href="https://serverfault.com/search?tab=votes&q=title%3a%22how%20to%22">22,056</a>  |     8.8 %  |
| ...            |        ...  |       ...  |       ...  |
| English Lang.. |     42,561  |     <a href="https://ell.stackexchange.com/search?tab=votes&q=title%3a%22how%20to%22">1,581</a>  |     3.7 %  |
+--------------------------------------------------------+
</pre>