Given the following output from the ls command, how many files are linked with file$1?$

drwxr$-$xr$-$x $3$ root root $4096$ Apr $807$:$12$ Desktop

$-$rw$-$r$--$r$--3$ root root $282$ Apr $2922$:$06$ file$1$

$-$rw$-$r$--$r$--1$ root root $282$ Apr $2922$:$06$ file$2$

$-$rw$-$r$--$r$--4$ root root $282$ Apr $2922$:$06$ file$3$

$-$rw$-$r$--$r$--2$ root root $282$ Apr $2922$:$06$ file$4$

$-$rw$-$r$--$r$--1$ root root $282$ Apr $2922$:$06$ file$5$

$-$rw$-$r$--$r$--1$ user$1$ sys $282$ Apr $2922$:$06$ file$6$