Installing MongoDB 1.8.1, in my case as a developer database, is easy. This blog post just itemises all the steps so that you can pretty much blindly follow along. I'll probably use these steps myself as I seem to be doing this regurlarly ;-)
Download the 64bit Linux binaries from here and unzip the contents to /usr/local.
cd /tmp wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-1.8.1.tgz sudo tar -zxf /tmp/mongodb-linux-x86_64-1.8.1.tgz -C /usr/local
Setup some symbolic links.
sudo ln -s /usr/local/mongodb-linux-x86_64-1.8.1 /usr/local/mongodb sudo ln -s /usr/local/mongodb/bin/bsondump /usr/local/bin/bsondump sudo ln -s /usr/local/mongodb/bin/mongo /usr/local/bin/mongo sudo ln -s /usr/local/mongodb/bin/mongod /usr/local/bin/mongod sudo ln -s /usr/local/mongodb/bin/mongodump /usr/local/bin/mongodump sudo ln -s /usr/local/mongodb/bin/mongoexport /usr/local/bin/mongoexport sudo ln -s /usr/local/mongodb/bin/mongofiles /usr/local/bin/mongofiles sudo ln -s /usr/local/mongodb/bin/mongoimport /usr/local/bin/mongoimport sudo ln -s /usr/local/mongodb/bin/mongorestore /usr/local/bin/mongorestore sudo ln -s /usr/local/mongodb/bin/mongos /usr/local/bin/mongos sudo ln -s /usr/local/mongodb/bin/mongosniff /usr/local/bin/mongosniff sudo ln -s /usr/local/mongodb/bin/mongostat /usr/local/bin/mongostat
The first "ln -s" above sets up a handy symbolic link between the versioned mongodb folder and its unversioned counterpart. When 10Gen release updates, say version 1.8.2, all you need to do is download, unzip, and link the '1.8.2 mongodb folder' to the unversioned folder and 'hey presto' everything should just work.
To get an init script working cleanly with this setup, download mine from my Github 'dotfiles' repo. Please note - my init script enables journaling and the REST interface (on line 51).
wget https://github.com/ijonas/dotfiles/raw/master/etc/init.d/mongod sudo mv mongod /etc/init.d/mongod sudo chmod +x /etc/init.d/mongod
You'll need to add a mongodb user and prep some folders
sudo useradd mongodb sudo mkdir -p /var/lib/mongodb sudo mkdir -p /var/log/mongodb sudo chown mongodb.mongodb /var/lib/mongodb sudo chown mongodb.mongodb /var/log/mongodb
Also, you need to activate your MongoDB service's init script by adding it to your system's run-level configuration. That way the service will startup during the boot sequence and stop nicely during the OS' shutdown procedure.
sudo update-rc.d mongod defaults
Lastly to launch MongoDB
UPDATE: Since April 6 Ubuntu now has prefabbed packages containing MongoDB 1.8.1, maintained by 10Gen. See the instruction below.