aws pem file permission

alibaba/database.md

@@ -0,0 +1,9 @@
+# Alibaba Cloud Academy:  Database
+
+* AsparaDB Disk size max
+  * 2TB : local disc
+  * 32TB : Cloud disc (ESSD)
+* Migration : Data Transmission Service (DTS)
+* Data Lake Analysis (DLA)
+* Elastic Compute Service (ECS)
+

aws/README.md

@@ -123,4 +123,34 @@ $ aws ec2 describe-instances help
 
   
 
-* ss
+* PEM (Windows) file permission change
+
+  ```sh
+  # display file permission
+  $ icacls <<pem file path>>
+  
+  # Remove the permissions inheritance
+  $ icacls <<pem file path>> /inheritance:r /T
+  # Grant read permission to the current user
+  $ icacls <<pem file path>> /grant <<user name>>:R
+  
+  # updated permission display
+  PS C:\dev\doc\ec2> icacls .\RPD-API.pem
+  .\RPD-API.pem RAZER\tenghie.yik:(R)
+  ###
+  
+  # ssh to aws ec2 using update pem file permission
+  $ ssh -i "netyth-ec2-test.pem" ubuntu@ec2-54-169-180-189.ap-southeast-1.compute.amazonaws.com
+  ```
+
+* PEM (ubuntu) file permission change
+
+  ```sh
+  # change file permission
+  $ chmod 400 <<pem file>>
+  
+  # ssh to aws ec2
+  $ ssh -i "netyth-ec2-test.pem" ubuntu@ec2-54-169-180-189.ap-southeast-1.compute.amazonaws.com
+  ```
+
+