.LP
\fITcpdump\fP prints out a description of the contents of packets on a
network interface that match the Boolean \fIexpression\fP (see
.LP
\fITcpdump\fP prints out a description of the contents of packets on a
network interface that match the Boolean \fIexpression\fP (see
for the \fIexpression\fP syntax); the
description is preceded by a time stamp, printed, by default, as hours,
minutes, seconds, and fractions of a second since midnight. It can also
for the \fIexpression\fP syntax); the
description is preceded by a time stamp, printed, by default, as hours,
minutes, seconds, and fractions of a second since midnight. It can also