[mongodb] What version of MongoDB is installed on Ubuntu

Hi I'm a bit of a shell n00b.

Can anyone tell me how I would check the version of MongoDB that is installed on my Linux Ubuntu machine?

I see that my MongoDB shell version: 1.2.2 so Im pretty sure that MongoDB itself is out dated too. And does anyone know of any 'How to update MongoDB' docs? I find mongodb.org to be a bit confusing.

Please and thank you.

Ok if I use db.version() inside of mongo shell it says 1.2.2

If I $ mongod --version I get this:

db version v1.2.2, pdfile version 4.5
Wed Oct 16 10:28:22 git version: nogitversion

I ran

sudo apt-get update
sudo apt-get install mongodb

and get

sudo apt-get install mongodb
Reading package lists... Done
Building dependency tree       
Reading state information... Done
mongodb is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 179 not upgraded.

mongod --version
db version v1.2.2, pdfile version 4.5
Wed Oct 16 10:31:07 git version: nogitversion

So why isn't it updating? Is apt-get pointing at the wrong repo / source?

inside shell:

mongod --version

In the terminal just write : $ mongod --version

To be complete, a short introduction for "shell noobs":

First of all, start your shell - you can find it inside the common desktop environments under the name "Terminal" or "Shell" somewhere in the desktops application menu.

You can also try using the key combo CTRL+F2, followed by one of those commands (depending on the desktop envrionment you're using) and the ENTER key:

xfce4-terminal
gnome-console
terminal
rxvt
konsole

If all of the above fail, try using xterm - it'll work in most cases.

Hint for the following commands: Execute the commands without the $ - it's just a marker identifying that you're on the shell.

After that just fire up mongod with the --version flag:

$ mongod --version

It shows you then something like

$ mongod --version
db version v2.4.6
Wed Oct 16 16:17:00.241 git version: nogitversion

To update it just execute

$ sudo apt-get update

and then

$ sudo apt-get install mongodb

In the terminal just enter the traditional command:

mongod --version

When you entered in mongo shell using "mongo" command , that time only you will notice

MongoDB shell version v3.4.0-rc2
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.0-rc2

also you can try command,in mongo shell , db.version()