  The following problem is studied in this paper: Which multipliers
$\{\lambda_{k, n}\}$ ensure the convergence, as $n\to \infty$, of the linear
means of the Fourier series of functions $f\in L_1[-\pi, \pi]$ $$
\sum_{k=-\infty}^\infty \lambda_{k, n}\hat{f}_k e^{ikx}, $$ where
$\widehat{f}_k$ is the $k$-th Fourier coefficient, at a point at which the
derivative of the function $\int_0^x f$ exists. A criterion for the convergence
of the $(C, 1)$-means ($\lambda_{k, n}=(1-\frac {|k|}{n+1})_+$) is found, while
in the general case $\lambda_{k, n}=\phi(\frac {k}{n+1})$ a sufficient
condition is derived for the convergence at all such points (that is, almost
everywhere). The answer is given in terms of the belonging of $\phi(x)$ and
$x\phi'(x)$ to the Wiener algebra of absolutely convergent Fourier integrals.
The obtained results are supplemented by some examples.
