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Index: usr.bin/cmp/cmp.1
===================================================================
--- usr.bin/cmp/cmp.1
+++ usr.bin/cmp/cmp.1
@@ -106,6 +106,40 @@
.It >1
An error occurred.
.El
+.Sh EXAMPLES
+Assuming a file named example.txt with the following contents:
+.Bd -literal -offset indent
+a
+b
+c
+.Ed
+.Pp
+Compare stdin with example.txt:
+.Bd -literal -offset indent
+$ echo -e "a\\nb\\nc" | cmp - example.txt
+.Ed
+.Pp
+Same as above but introducing a change in byte three in stdin.
+Show the byte number (decimal) and differing byte (octal):
+.Bd -literal -offset indent
+$ echo -e "a\\nR\\nc" | cmp -l - example.txt
+ 3 122 142
+.Ed
+.Pp
+Compare example.txt and /boot/loader.conf exiting if size differs.
+Note that
+.Fl z
+can only be used with regular files:
+.Bd -literal -offset indent
+$ cmp -z example.txt /boot/loader.conf
+example.txt /boot/loader.conf differ: size
+.Ed
+.Pp
+Compare stdin with file example.txt omitting the 4 first bytes from stdin and
+the 2 first bytes from example.txt:
+.Bd -literal -offset indent
+$ echo -e "a\\nR\\nb\\nc" | cmp - example.txt 4 2
+.Ed
.Sh SEE ALSO
.Xr diff 1 ,
.Xr diff3 1

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