Updating README.md and include version function

README.md

@@ -11,12 +11,31 @@ Requirements
 * Zimbra Collaboration Suite Opensource 8.6 or higher;
 * GNU Wget - a computer program that retrieves content from web servers;
 * GNU Parallel - a shell tool for executing jobs in parallel using one or more CPU;
-* cURL - A command line tool and library for transferring data with URL syntax;
+* cURL - a command line tool and library for transferring data with URL syntax;
+* GNU grep - a command-line utility for searching plain-text data sets for lines matching a regular expression;
+* date - command used to print out, or change the value of, the system's time and date information.
 
 Instalation
 ------------
 
-TO DO
+First, install all the required packages in your system:
+
+```
+apt-get install parallel wget curl grep date
+```
+
+After that, download and unpack a stable release of zmbackup in "Release" section, or git clone the Master branch:
+
+```
+git clone https://github.com/lucascbeyeler/zmbackup.git
+```
+
+Enter inside the folder zmbackup and execute the script install.sh. Follow the instructions and then, to validate, execute the command "zmbackup -v" as zimbra user. The command should execute correctly:
+
+```
+$ zmbackup -v
+zmbackup version: 1.0.0 Release Candidate
+```
 
 Documentation
 ------------

src/zmbackup

@@ -80,7 +80,8 @@ show_help (){
   printf "\n -i, --incremental       : Execute incremental backup for an account, a list of accounts, or all accounts."
   printf "\n -l, --list              : List all backup sessions that still exist in your disk."
   printf "\n -r, --restore           : Restore the backup inside the users account."
-  printf "\n -d, --delete            : Delete a session of backup"
+  printf "\n -d, --delete            : Delete a session of backup."
+  printf "\n -v, --version           : Show the zmbackup version."
 
   # All the options related to Full Backups will be put here
   printf "\nFull Backup Options:\n"
@@ -555,6 +556,9 @@ case "$1" in
   "-h"|"--help" )
     show_help
   ;;
+  "-v"|"--version" )
+    echo "zmbackup version: 1.0.0 Release Candidate"
+  ;;
   * )
     echo "Error! Incorrect options"
   ;;