diff --git a/docs/ikev2-howto-zh.md b/docs/ikev2-howto-zh.md
index ba9468f..e7f56e8 100644
--- a/docs/ikev2-howto-zh.md
+++ b/docs/ikev2-howto-zh.md
@@ -78,7 +78,7 @@ sudo VPN_DNS_SRV1=1.1.1.1 VPN_DNS_SRV2=1.0.0.1 ikev2.sh --auto
 </details>
 <details>
 <summary>
-单击此处以查看 IKEv2 辅助脚本的使用信息。
+单击此处查看 IKEv2 脚本的使用信息。
 </summary>
 
 ```
@@ -86,10 +86,10 @@ Usage: bash ikev2.sh [options]
 
 Options:
   --auto                        run IKEv2 setup in auto mode using default options (for initial setup only)
-  --addclient [client name]     add a new client using default options (after IKEv2 setup)
-  --exportclient [client name]  export configuration for an existing client (after IKEv2 setup)
-  --listclients                 list the names of existing clients (after IKEv2 setup)
-  --revokeclient                revoke a client certificate (after IKEv2 setup)
+  --addclient [client name]     add a new client using default options
+  --exportclient [client name]  export configuration for an existing client
+  --listclients                 list the names of existing clients
+  --revokeclient                revoke a client certificate
   --removeikev2                 remove IKEv2 and delete all certificates and keys from the IPsec database
   -h, --help                    show this help message and exit
 
diff --git a/docs/ikev2-howto.md b/docs/ikev2-howto.md
index bdab34b..443dd90 100644
--- a/docs/ikev2-howto.md
+++ b/docs/ikev2-howto.md
@@ -78,7 +78,7 @@ sudo VPN_DNS_SRV1=1.1.1.1 VPN_DNS_SRV2=1.0.0.1 ikev2.sh --auto
 </details>
 <details>
 <summary>
-Click here to view usage information for the IKEv2 helper script.
+Click here to view usage information for the IKEv2 script.
 </summary>
 
 ```
@@ -86,10 +86,10 @@ Usage: bash ikev2.sh [options]
 
 Options:
   --auto                        run IKEv2 setup in auto mode using default options (for initial setup only)
-  --addclient [client name]     add a new client using default options (after IKEv2 setup)
-  --exportclient [client name]  export configuration for an existing client (after IKEv2 setup)
-  --listclients                 list the names of existing clients (after IKEv2 setup)
-  --revokeclient                revoke a client certificate (after IKEv2 setup)
+  --addclient [client name]     add a new client using default options
+  --exportclient [client name]  export configuration for an existing client
+  --listclients                 list the names of existing clients
+  --revokeclient                revoke a client certificate
   --removeikev2                 remove IKEv2 and delete all certificates and keys from the IPsec database
   -h, --help                    show this help message and exit
 
diff --git a/extras/add_vpn_user.sh b/extras/add_vpn_user.sh
index 8e77c97..140541b 100755
--- a/extras/add_vpn_user.sh
+++ b/extras/add_vpn_user.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Script to add/update an VPN user for both IPsec/L2TP and Cisco IPsec
+# Script to add/update a VPN user for both IPsec/L2TP and Cisco IPsec
 #
 # Copyright (C) 2018-2021 Lin Song <linsongui@gmail.com>
 #
@@ -54,11 +54,9 @@ case "$VPN_USER $VPN_PASSWORD" in
     ;;
 esac
 
-clear
-
 cat <<EOF
 
-Welcome! This script will add or update an VPN user account for both
+Welcome! Use this script to add or update a VPN user account for both
 IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes.
 
 If the username you specified already exists, it will be updated
diff --git a/extras/del_vpn_user.sh b/extras/del_vpn_user.sh
index 9bacc79..a0dadda 100755
--- a/extras/del_vpn_user.sh
+++ b/extras/del_vpn_user.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Script to delete an VPN user for both IPsec/L2TP and Cisco IPsec
+# Script to delete a VPN user for both IPsec/L2TP and Cisco IPsec
 #
 # Copyright (C) 2018-2021 Lin Song <linsongui@gmail.com>
 #
@@ -68,11 +68,9 @@ EOF
   exit 1
 fi
 
-clear
-
 cat <<EOF
 
-Welcome! This script will delete an VPN user account for both
+Welcome! Use this script to delete a VPN user account for both
 IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes.
 
 Please double check before continuing!
diff --git a/extras/ikev2setup.sh b/extras/ikev2setup.sh
index d3f2897..963494d 100755
--- a/extras/ikev2setup.sh
+++ b/extras/ikev2setup.sh
@@ -169,10 +169,10 @@ Usage: bash $0 [options]
 
 Options:
   --auto                        run IKEv2 setup in auto mode using default options (for initial setup only)
-  --addclient [client name]     add a new client using default options (after IKEv2 setup)
-  --exportclient [client name]  export configuration for an existing client (after IKEv2 setup)
-  --listclients                 list the names of existing clients (after IKEv2 setup)
-  --revokeclient                Revoke a client certificate (after IKEv2 setup)
+  --addclient [client name]     add a new client using default options
+  --exportclient [client name]  export configuration for an existing client
+  --listclients                 list the names of existing clients
+  --revokeclient                revoke a client certificate
   --removeikev2                 remove IKEv2 and delete all certificates and keys from the IPsec database
   -h, --help                    show this help message and exit
 
@@ -344,8 +344,7 @@ select_swan_update() {
 
 show_welcome() {
 cat <<'EOF'
-Welcome! Use this script to set up IKEv2 after setting up your own IPsec VPN server.
-Alternatively, you may manually set up IKEv2. See: https://git.io/ikev2
+Welcome! Use this script to set up IKEv2 on your IPsec VPN server.
 
 I need to ask you a few questions before starting setup.
 You can use the default options and just press enter if you are OK with them.
@@ -548,10 +547,10 @@ enter_custom_dns() {
       echo "Invalid DNS server."
       read -rp "Enter primary DNS server: " dns_server_1
     done
-    read -rp "Enter secondary DNS server (Enter to skip): " dns_server_2
+    read -rp "Enter secondary DNS server (enter to skip): " dns_server_2
     until [ -z "$dns_server_2" ] || check_ip "$dns_server_2"; do
       echo "Invalid DNS server."
-      read -rp "Enter secondary DNS server (Enter to skip): " dns_server_2
+      read -rp "Enter secondary DNS server (enter to skip): " dns_server_2
     done
     if [ -n "$dns_server_2" ]; then
       dns_servers="$dns_server_1 $dns_server_2"
diff --git a/extras/update_vpn_users.sh b/extras/update_vpn_users.sh
index 4f6b3fa..0195e14 100755
--- a/extras/update_vpn_users.sh
+++ b/extras/update_vpn_users.sh
@@ -83,11 +83,9 @@ if printf '%s' "$VPN_USERS" | tr ' ' '\n' | sort | uniq -c | grep -qv '^ *1 '; t
   exiterr "VPN usernames must not contain duplicates."
 fi
 
-clear
-
 cat <<'EOF'
 
-Welcome! This script will update VPN user accounts for both
+Welcome! Use this script to update VPN user accounts for both
 IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes.
 
 WARNING: *ALL* existing VPN users will be removed and replaced
diff --git a/extras/vpnupgrade.sh b/extras/vpnupgrade.sh
index e681812..71e3e52 100755
--- a/extras/vpnupgrade.sh
+++ b/extras/vpnupgrade.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Script to upgrade Libreswan on Ubuntu and Debian
+# Script to update Libreswan on Ubuntu and Debian
 #
 # The latest version of this script is available at:
 # https://github.com/hwdsl2/setup-ipsec-vpn
@@ -123,12 +123,9 @@ if [ "$swan_ver_old" = "$SWAN_VER" ]; then
   esac
 fi
 
-clear
-
 cat <<EOF
-Welcome! This script will build and install Libreswan on your server.
-Additional packages required for compilation will also be installed.
-It is intended for upgrading servers to a newer Libreswan version.
+
+Welcome! Use this script to update Libreswan on your IPsec VPN server.
 
 Current version:    Libreswan $swan_ver_old
 Version to install: Libreswan $SWAN_VER
diff --git a/extras/vpnupgrade_amzn.sh b/extras/vpnupgrade_amzn.sh
index 5afebb4..81c2edb 100755
--- a/extras/vpnupgrade_amzn.sh
+++ b/extras/vpnupgrade_amzn.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Script to upgrade Libreswan on Amazon Linux 2
+# Script to update Libreswan on Amazon Linux 2
 #
 # The latest version of this script is available at:
 # https://github.com/hwdsl2/setup-ipsec-vpn
@@ -102,12 +102,9 @@ if [ "$swan_ver_old" = "$SWAN_VER" ]; then
   esac
 fi
 
-clear
-
 cat <<EOF
-Welcome! This script will build and install Libreswan on your server.
-Additional packages required for compilation will also be installed.
-It is intended for upgrading servers to a newer Libreswan version.
+
+Welcome! Use this script to update Libreswan on your IPsec VPN server.
 
 Current version:    Libreswan $swan_ver_old
 Version to install: Libreswan $SWAN_VER
diff --git a/extras/vpnupgrade_centos.sh b/extras/vpnupgrade_centos.sh
index dc0b79a..b9c134c 100755
--- a/extras/vpnupgrade_centos.sh
+++ b/extras/vpnupgrade_centos.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Script to upgrade Libreswan on CentOS and RHEL
+# Script to update Libreswan on CentOS and RHEL
 #
 # The latest version of this script is available at:
 # https://github.com/hwdsl2/setup-ipsec-vpn
@@ -117,12 +117,9 @@ if [ "$swan_ver_old" = "$SWAN_VER" ]; then
   esac
 fi
 
-clear
-
 cat <<EOF
-Welcome! This script will build and install Libreswan on your server.
-Additional packages required for compilation will also be installed.
-It is intended for upgrading servers to a newer Libreswan version.
+
+Welcome! Use this script to update Libreswan on your IPsec VPN server.
 
 Current version:    Libreswan $swan_ver_old
 Version to install: Libreswan $SWAN_VER