getent command was added

pages/common/visudo.md

@@ -1,6 +1,6 @@
 # visudo 
 
-> Safely edit the sudoers file. Command requires super user privilegies.
+> Safely edit the sudoers file.
 
 - Edit sudoers file:
 

pages/linux/getent.md

@@ -0,0 +1,23 @@
+# getent  
+
+> Get entries from Name Service Switch libraries.
+
+- Get list of all groups:
+
+`getent group`
+
+- See the members of a group:
+
+`getenet group {{group_name}}`
+
+- Get list of all services:
+
+`getent services`
+
+- Find a username by UID:
+
+`getent passwd 1000`
+
+- Perform a reverse DNS lookup:
+
+`getent hosts {{host}}`