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-rw-r--r--src/iperf_locale.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/iperf_locale.c b/src/iperf_locale.c
index 8d6dd0b..d5a5354 100644
--- a/src/iperf_locale.c
+++ b/src/iperf_locale.c
@@ -109,6 +109,9 @@ const char usage_longstr[] = "Usage: iperf3 [-s|-c host] [options]\n"
" -J, --json output in JSON format\n"
" --logfile f send output to a log file\n"
" --forceflush force flushing output at every interval\n"
+ " --timestamps <format> emit a timestamp at the start of each output line\n"
+ " (using optional format string as per strftime(3))\n"
+
" -d, --debug emit debugging output\n"
" -v, --version show version information and quit\n"
" -h, --help show this message and quit\n"