Modify sudo lecture message to be more informational (#1800)

Author: taoyl-ms

files/build_templates/sonic_debian_extension.j2

@@ -184,6 +184,7 @@ sudo cp $IMAGE_CONFIGS/asn/deployment_id_asn_map.yml $FILESYSTEM_ROOT/etc/sonic/
 
 # Copy sudoers configuration file
 sudo cp $IMAGE_CONFIGS/sudoers/sudoers $FILESYSTEM_ROOT/etc/
+sudo cp $IMAGE_CONFIGS/sudoers/sudoers.lecture $FILESYSTEM_ROOT/etc/
 
 # Copy control plane ACL management daemon files
 sudo cp $IMAGE_CONFIGS/caclmgrd/caclmgrd.service  $FILESYSTEM_ROOT/etc/systemd/system/

files/image_config/sudoers/sudoers

@@ -10,6 +10,7 @@ Defaults        env_reset
 #Defaults        mail_badpass
 Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
 Defaults        env_keep += "VTYSH_PAGER"
+Defaults        lecture_file = /etc/sudoers.lecture
 
 # Host alias specification
 

files/image_config/sudoers/sudoers.lecture

@@ -0,0 +1,4 @@
+
+Make sure your account has RW permission to current device.
+Otherwise sudo requests will be rejected.
+