diff --git a/docs/source/guides/admin-guides/references/man1/rflash.1.rst b/docs/source/guides/admin-guides/references/man1/rflash.1.rst
index 84d176e49..dbece0af2 100644
--- a/docs/source/guides/admin-guides/references/man1/rflash.1.rst
+++ b/docs/source/guides/admin-guides/references/man1/rflash.1.rst
@@ -57,7 +57,11 @@ OpenPOWER OpenBMC specific :
 ============================
 
 
-\ **rflash**\  \ *noderange*\  [\ *tar_file_path*\  | \ *image_id*\ ] [\ **-c | -**\ **-check**\ ] [\ **-a | -**\ **-activate**\ ] [\ **-l | -**\ **-list**\ ] [\ **-u | -**\ **-upload**\ ] [\ **-d | -**\ **-delete**\ ]
+\ **rflash**\  \ *noderange*\  {[\ **-c | -**\ **-check**\ ] | [\ **-l | -**\ **-list**\ ]}
+
+\ **rflash**\  \ *noderange*\  \ *tar_file_path*\  {[\ **-c | -**\ **-check**\ ] | [\ **-u | -**\ **-upload**\ ]}
+
+\ **rflash**\  \ *noderange*\  \ *image_id*\  {[\ **-a | -**\ **-activate**\ ] | [\ **-d | -**\ **-delete**\ ]}
 
 
 
diff --git a/docs/source/guides/admin-guides/references/man5/nics.5.rst b/docs/source/guides/admin-guides/references/man5/nics.5.rst
index cf4aab58c..208523103 100644
--- a/docs/source/guides/admin-guides/references/man5/nics.5.rst
+++ b/docs/source/guides/admin-guides/references/man5/nics.5.rst
@@ -129,7 +129,7 @@ nics Attributes:
 \ **nicsadapter**\ 
  
  Comma-separated list of extra parameters that will be used for each NIC configuration.
-                     <nic1>!<param1=value1 param2=value2>|<param3=value3>,<nic2>!<param4=value4 param5=value5>|<param6=value6>, for example, eth0!MTU=1500|MTU=1460,ib0!MTU=65520 CONNECTED_MODE=yes.
+                     <nic1>!<param1=value1 param2=value2>,<nic2>!<param4=value4 param5=value5>, for example, enP3p3s0f1!mac=98:be:94:59:fa:cd linkstate=DOWN,enP3p3s0f2!mac=98:be:94:59:fa:ce candidatename=enP3p3s0f2/enx98be9459face
  
 
 
diff --git a/docs/source/guides/admin-guides/references/man7/group.7.rst b/docs/source/guides/admin-guides/references/man7/group.7.rst
index 9a67dd224..a79e56ee8 100644
--- a/docs/source/guides/admin-guides/references/man7/group.7.rst
+++ b/docs/source/guides/admin-guides/references/man7/group.7.rst
@@ -41,7 +41,7 @@ group Attributes:
 
 \ **addkcmdline**\  (bootparams.addkcmdline)
  
- User specified one or more parameters to be passed to the kernel. For the kernel options need to be persistent after installation, specify them with prefix "R::"
+ User specified kernel options for os provision process(no prefix) or the provisioned os(with prefix "R::"). The options should be delimited with spaces(" ")
  
 
 
@@ -669,7 +669,7 @@ group Attributes:
 \ **nicsadapter**\  (nics.nicsadapter)
  
  Comma-separated list of extra parameters that will be used for each NIC configuration.
-                     <nic1>!<param1=value1 param2=value2>|<param3=value3>,<nic2>!<param4=value4 param5=value5>|<param6=value6>, for example, eth0!MTU=1500|MTU=1460,ib0!MTU=65520 CONNECTED_MODE=yes.
+                     <nic1>!<param1=value1 param2=value2>,<nic2>!<param4=value4 param5=value5>, for example, enP3p3s0f1!mac=98:be:94:59:fa:cd linkstate=DOWN,enP3p3s0f2!mac=98:be:94:59:fa:ce candidatename=enP3p3s0f2/enx98be9459face
  
 
 
diff --git a/docs/source/guides/admin-guides/references/man7/node.7.rst b/docs/source/guides/admin-guides/references/man7/node.7.rst
index 0ab71ac4d..fbf9ada59 100644
--- a/docs/source/guides/admin-guides/references/man7/node.7.rst
+++ b/docs/source/guides/admin-guides/references/man7/node.7.rst
@@ -41,7 +41,7 @@ node Attributes:
 
 \ **addkcmdline**\  (bootparams.addkcmdline)
  
- User specified one or more parameters to be passed to the kernel. For the kernel options need to be persistent after installation, specify them with prefix "R::"
+ User specified kernel options for os provision process(no prefix) or the provisioned os(with prefix "R::"). The options should be delimited with spaces(" ")
  
 
 
@@ -669,7 +669,7 @@ node Attributes:
 \ **nicsadapter**\  (nics.nicsadapter)
  
  Comma-separated list of extra parameters that will be used for each NIC configuration.
-                     <nic1>!<param1=value1 param2=value2>|<param3=value3>,<nic2>!<param4=value4 param5=value5>|<param6=value6>, for example, eth0!MTU=1500|MTU=1460,ib0!MTU=65520 CONNECTED_MODE=yes.
+                     <nic1>!<param1=value1 param2=value2>,<nic2>!<param4=value4 param5=value5>, for example, enP3p3s0f1!mac=98:be:94:59:fa:cd linkstate=DOWN,enP3p3s0f2!mac=98:be:94:59:fa:ce candidatename=enP3p3s0f2/enx98be9459face
  
 
 
diff --git a/docs/source/guides/admin-guides/references/man7/osimage.7.rst b/docs/source/guides/admin-guides/references/man7/osimage.7.rst
index c74014cf6..b4310d976 100644
--- a/docs/source/guides/admin-guides/references/man7/osimage.7.rst
+++ b/docs/source/guides/admin-guides/references/man7/osimage.7.rst
@@ -41,7 +41,7 @@ osimage Attributes:
 
 \ **addkcmdline**\  (linuximage.addkcmdline)
  
- User specified arguments to be passed to the kernel.  The user arguments are appended to xCAT.s default kernel arguments. For the kernel options need to be persistent after installation, specify them with prefix "R::".  This attribute is ignored if linuximage.boottarget is set.
+ User specified kernel options for os provision process(no prefix) or the provisioned os(with prefix "R::"). The options should be delimited with spaces(" "). This attribute is ignored if linuximage.boottarget is set.
  
 
 
diff --git a/perl-xCAT/xCAT/Usage.pm b/perl-xCAT/xCAT/Usage.pm
index dd40450e3..b41fa6ab9 100755
--- a/perl-xCAT/xCAT/Usage.pm
+++ b/perl-xCAT/xCAT/Usage.pm
@@ -342,10 +342,12 @@ my %usage = (
 	rflash <noderange> -p <rpm_directory> [--activate {disruptive|deferred}] [-d <data_directory>]
 	rflash <noderange> [--commit | --recover] [-V|--verbose]
         rflash <noderange> [--bpa_acdl]
-    PPC64LE (using IPMI Management) specific:
-        rflash <noderange> [-c|--check] [--retry=<count>] [-V] [<hpm_file>|-d=<data_directory>]
-    PPC64LE (using OpenBMC Management) specific:
-        rflash <noderange> [-c|--check] [-l|--list] [-a|--activate] [-u|--upload] [-d|--delete] [<tar_file>|<image_id>]",
+    OpenPOWER BMC specific (using IPMI):
+        rflash <noderange> [<hpm_file_path>|-d=<data_directory>] [-c|--check] [--retry=<count>] [-V]
+    OpenPOWER OpenBMC specific:
+        rflash <noderange> {[-c|--check] | [-l|--list]}
+        rflash <noderange> <tar_file_path> {[-c|--check] | [-u|--upload]}
+        rflash <noderange> <image_id> {[-a|--activate] | [-d|--delete]}",
     "mkhwconn" =>
       "Usage:
     mkhwconn [-h|--help]
diff --git a/xCAT-client/pods/man1/rflash.1.pod b/xCAT-client/pods/man1/rflash.1.pod
index 70c964d15..ac2de5adc 100644
--- a/xCAT-client/pods/man1/rflash.1.pod
+++ b/xCAT-client/pods/man1/rflash.1.pod
@@ -28,7 +28,11 @@ B<rflash> I<noderange> [I<hpm_file_path> | B<-d=>I<data_directory>] [B<-c>|B<--c
 
 =head2 OpenPOWER OpenBMC specific :
 
-B<rflash> I<noderange> [I<tar_file_path> | I<image_id>] [B<-c>|B<--check>] [B<-a>|B<--activate>] [B<-l>|B<--list>] [B<-u>|B<--upload>] [B<-d>|B<--delete>]
+B<rflash> I<noderange> {[B<-c>|B<--check>] | [B<-l>|B<--list>]}
+
+B<rflash> I<noderange> I<tar_file_path> {[B<-c>|B<--check>] | [B<-u>|B<--upload>]}
+
+B<rflash> I<noderange> I<image_id> {[B<-a>|B<--activate>] | [B<-d>|B<--delete>]}
 
 =head1 B<Description>