What are the ways in which replication agreements between directory structures be arranged?

The different ways in which the replication agreements between directory structures can be arranged are:

- Multi-Master server - There are two or more master directory servers in this type of environment. All the servers which are master can perform all the LDAP operations such as read, write & searches. This can lead to synchronization issues in the directories between the directory servers. It is always better to have separate directories for separate servers.

- Single master replication: In this type of environment there are two servers, the master server and a replica server. The master server can perform all the LDAP operations which are read, bind, compare and write. The replica server on the other hand cannot perform write operations. For write operations the replica server requests the master server. In such a setup the synchronization issues do not occur. Instead the problem can occur when the master server stops functioning.

- Floating-master server: This model is similar to the single master replication model. The only difference is that the replica server cannot perform write operations while the master server is running. But in case the master server stops functioning the replica server can perform write operations.

Write the steps involved in creating and executing a program to implement the “case” command.

The steps involved are as follows:

- Login as an ordinary user.

- Open the text editor.

- Open the terminal window.

- Type the following script:

#!/bin/sh echo “ What is your car model? \c” read car case”$mycar” in Ford) echo “An American car” echo “Made in Detroit” ;; Mercedes) echo “ Are you sure you own one?” ;; *) echo “Never heard car” esac

- Save the script with a name testscript.

- Type command in terminal chmod 777 testscript.

- Type ./myscript21