1 files changed, 9 insertions, 8 deletions

diff --git a/usage.c b/usage.c
index 876d253ab..c7bc0e8a9 100644
--- a/usage.c
+++ b/usage.c
@@ -170,10 +170,11 @@ const char dd_usage[] =
         "\tcount=N\tcopy only N input blocks\n"
         "\tskip=N\tskip N input blocks\n"
         "\tseek=N\tskip N output blocks\n"
-        "\tconv=notrunc\t dont truncate of at end of write\n"
-        "\tconv=sync\t pad the last block with zeros until blocksize\n"
+        "\tconv=notrunc\tdon't truncate output file\n"
+        "\tconv=sync\tpad blocks with zeros\n"
         "\n"
-        "Numbers may be suffixed by w (x2), k (x1024), b (x512), or M (x1024^2)\n"
+        "Numbers may be suffixed by c (x1), w (x2), b (x512), kD (x1000), k (x1024),\n"
+        "MD (x1000000), M (x1048576), GD (x1000000000) or G (x1073741824).\n"
 #endif
         ;
 #endif
@@ -1185,20 +1186,20 @@ const char syslogd_usage[] =
 
 #if defined BB_TAIL
 const char tail_usage[] =
-        "tail [OPTION] [FILE]...\n"
+        "tail [OPTION]... [FILE]...\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
         "\nPrint last 10 lines of each FILE to standard output.\n"
         "With more than one FILE, precede each with a header giving the\n"
         "file name. With no FILE, or when FILE is -, read standard input.\n\n"
         "Options:\n"
 #ifndef BB_FEATURE_SIMPLE_TAIL
-        "\t-c=N[kbm]\toutput the last N bytes\n"
+        "\t-c N[kbm]\toutput the last N bytes\n"
 #endif
-        "\t-n NUM\t\tPrint last NUM lines instead of first 10\n"
-        "\t-f\t\tOutput data as the file grows.\n"
+        "\t-n N[kbm]\tprint last N lines instead of last 10\n"
+        "\t-f\t\toutput data as the file grows\n"
 #ifndef BB_FEATURE_SIMPLE_TAIL
         "\t-q\t\tnever output headers giving file names\n"
-        "\t-s SEC\t\tWait SEC seconds between reads with -f\n"
+        "\t-s SEC\t\twait SEC seconds between reads with -f\n"
         "\t-v\t\talways output headers giving file names\n\n"
         "If the first character of N (bytes or lines) is a `+', output begins with \n"
         "the Nth item from the start of each file, otherwise, print the last N items\n"