.CD "file \(en make a guess as to a file's type based on contents"
.SX "file \fIname ..."
.FL "\fR(none)"
.EY "file a.out ar.h" "Guess at types"
.PP
\fIFile\fR reads the first block of a file and tries to make an 
intelligent guess about what kind of file it is.  
It understands about archives, C
source programs, executable binaries, shell scripts, and English text.