Is mongodb running?

check with either:

ps -edaf | grep mongo | grep -v grep  # "ps" flags may differ on your OS

or

/etc/init.d/mongodb status     # for MongoDB version < 2.6

/etc/init.d/mongod status      # for MongoDB version >= 2.6

or

service mongodb status         # for MongoDB version < 2.6

service mongod status          # for MongoDB version >= 2.6

to see if mongod is running (you need to be root to do this, or prefix everything with sudo). Please note that the 'grep' command will always also show up as a separate process.

Check the log file /var/log/mongo/mongo.log to see if there are any problems reported.

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I find:

ps -ax | grep mongo

To be a lot more consistent. The value returned can be used to detect how many instances of mongod there are running

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For quickly checking if mongodb is running, this quick nc trick will let you know.

nc -zvv localhost 27017

The above command assumes that you are running it on the default port on localhost.

For auto-starting it, you might want to look at this thread.

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this should work fine...

pgrep mongod

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To check current running status of mongodb use: sudo service mongodb status

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On Ubuntu (doc)

sudo systemctl status mongod

If running

● mongod.service - MongoDB Database Server
     Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
     Active: active (running) since Wed 2020-10-14 14:13:40 UTC; 3s ago
       Docs: https://docs.mongodb.org/manual
   Main PID: 1604 (mongod)
     Memory: 210.8M
     CGroup: /system.slice/mongod.service
             └─1604 /usr/bin/mongod --config /etc/mongod.conf

If not running

● mongod.service - MongoDB Database Server
     Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
     Active: inactive (dead)
       Docs: https://docs.mongodb.org/manual

To start mongodb

sudo systemctl start mongod

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Correct, closing the shell will stop MongoDB. Try using the --fork command line arg for the mongod process which makes it run as a daemon instead. I'm no Unix guru, but I'm sure there must be a way to then get it to auto start when the machine boots up.

e.g.

mongod --fork --logpath /var/log/mongodb.log --logappend

Check out the full documentation on Starting and Stopping Mongo.

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You can use the below command, to check MongoDB status, e.g: sudo service MongoDB status which displays the status of MongoDB service as like the screenshot:

https://i.stack.imgur.com/6gGdn.png

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Probably because I didn't shut down my dev server properly or a similar reason. To fix it, remove the lock and start the server with: sudo rm /var/lib/mongodb/mongod.lock ; sudo start mongodb

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To check whether the server is running on a systemd operating system, in a manner more suitable for use in a shell script, use

systemctl is-active mongod

rather than

systemctl status mongod

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I know this is for php, but I got here looking for a solution for node. Using mongoskin:

mongodb.admin().ping(function(err) {
    if(err === null)
        // true - you got a conntion, congratulations
    else if(err.message.indexOf('failed to connect') !== -1)
        // false - database isn't around
    else
        // actual error, do something about it
})

With other drivers, you can attempt to make a connection and if it fails, you know the mongo server's down. Mongoskin needs to actually make some call (like ping) because it connects lazily. For php, you can use the try-to-connect method. Make a script!

PHP:

$dbIsRunning = true
try {
  $m = new MongoClient('localhost:27017');
} catch($e) {
  $dbIsRunning = false
}

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Try this:

sudo systemctl status mongod

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