為什麼Latex輸出的PDF文檔是空白的？

我寫了一個很簡單的latex的hello world，

documantclass{article}
egin{document}
hello, world!
end{document}


然後使用pdflatex編譯輸出pdf後，pdf是空白的沒有任何內容。

我的操作步驟是在終端裡面輸入 pdflatex test.tex回車，然後會出現

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Debian)
restricted write18 enabled.
entering extended mode
(./test.tex
LaTeX2e &<2011/06/27&>
Babel &<3.9h&> and hyphenation patterns for 2 languages loaded.
! Undefined control sequence.
l.1 documantclass
{article}
?


運行後輸出的log文件是

? r
OK, entering
onstopmode...

! LaTeX Error: Missing egin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type H & for immediate help.
...

l.1 documantclass{a
rticle}
You"re in trouble here. Try typing & to proceed.
If that doesn"t work, type X & to quit.

Missing character: There is no e in font nullfont!
(./test.aux)
openout1 = `test.aux".

LaTeX Font Info: ... okay on input line 2.

! LaTeX Error: The font size command
ormalsize is not defined:
there is probably something wrong with the class file.

See the LaTeX manual or LaTeX Companion for explanation.
Type H & for immediate help.
...

l.2 egin{document}

Your command was ignored.
Type I & & to replace it with another command,
or & to continue without it.

Missing character: There is no d in font nullfont!
Missing character: There is no ! in font nullfont!

! LaTeX Error: The font size command
ormalsize is not defined:
there is probably something wrong with the class file.

See the LaTeX manual or LaTeX Companion for explanation.
Type H & for immediate help.
...

l.4 end{document}


有log要會看啊……