Improve the usage info for -h flag

inventory_linux.sh

@@ -21,9 +21,37 @@ perform_interesting_files_2=1
 binarylist='nmap\|perl\|awk\|find\|bash\|sh\|man\|more\|less\|vi\|emacs\|vim\|nc\|netcat\|python\|ruby\|lua\|irb\|tar\|zip\|gdb\|pico\|scp\|git\|rvim\|script\|ash\|csh\|curl\|dash\|ed\|env\|expect\|ftp\|sftp\|node\|php\|rpm\|rpmquery\|socat\|strace\|taskset\|tclsh\|telnet\|tftp\|wget\|wish\|zsh\|ssh'
 
 #help function
-help () 
-{ 	
-  printf '%b\n' "$(cat ./usage.txt)"
+help() {
+  cat <<EOF
+Usage: $(basename "${BASH_SOURCE[0]}") -r <report_name> -e <report_path> -k <keyword> [options]
+ 
+A script to enumerate local information from a Linux host
+ 
+Available options:
+ 
+	-k	keyword:  Searching for the keyword $keyword in conf, php, ini and log files
+	-r	report:   Report name = $report
+	-e	export:   Export folder location = $export\Export_Folder-DD-MM-YY
+	-t	thorough: Thorough tests = Enabled (SUID/GUID file scanning will be perfomed)
+	-p	performance: Avoid heavy scans to speed-up the script execution
+		This will exclude the following checks:
+			- search for suid/guid files (equivalent of '-t')
+			- list all world-writable files
+			- use supplied $keyword and search inside *.conf,*.php,*.log and *.ini file names for potential matches
+	-q	quick: speed up the scan time significantly
+		This will exlude following checks:
+			- check to see if various software are installed (nc, netcat, wget, etc.)
+			- search for installed compilers
+			- list out sensitive files (if can read/modify, etc.)
+			- check for any *.plan files accessible in /home
+			- check if there are any .rhosts files accessible
+			- list of NFS displaying partitions and filesystems
+			- check for credentials in /etc/fstab
+			- extract *.conf files from /etc
+			- extract user history files that are accessible (.*_history)
+	-h 	help: Show this help page
+EOF
+  exit
 }
 
 header()