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-rw-r--r--tcpdump.1.in13
1 files changed, 13 insertions, 0 deletions
diff --git a/tcpdump.1.in b/tcpdump.1.in
index 984c1964..0d408549 100644
--- a/tcpdump.1.in
+++ b/tcpdump.1.in
@@ -478,6 +478,19 @@ The supported values for \fItimestamp_precision\fP are \fBmicro\fP for
microsecond resolution and \fBnano\fP for nanosecond resolution. The
default is microsecond resolution.
.TP
+.B \-\-micro
+.PD 0
+.TP
+.B \-\-nano
+.PD
+Shorthands for \fB\-\-time\-stamp\-precision=micro\fP or
+\fB\-\-time\-stamp\-precision=nano\fP, adjusting the time stamp
+precision accordingly. When reading packets from a savefile, using
+\fB\-\-micro\fP truncates time stamps if the savefile was created with
+nanosecond precision. In contrast, a savefile created with microsecond
+precision will have trailing zeroes added to the time stamp when
+\fB\-\-nano\fP is used.
+.TP
.B \-K
.PD 0
.TP