MongoDB not working. “ERROR: dbpath (/data/db) does not exist.”

Question

I\'m getting the following error when I try to run \"mongod\" in the terminal. I\'ve tried uninstalling, reinstalling, and restarting the machine. Any suggestions on how to

Answer 1

Daemons (usually ending with d) are normally started as services. Starting the service (daemon) will allow mongodb to work as designed (without permission changes if integrates well with your distro). I start it using the service named mongodb instead of starting mongod directly--on distro with systemd enable on startup then run like:

sudo systemctl enable mongodb    
sudo systemctl start mongodb

or, on distro with upstart (if you have /etc/init) or init (if you have /etc/init.d) ( https://www.tecmint.com/systemd-replaces-init-in-linux/ ) instead run:

sudo service mongodb enable
sudo service mongodb start

If you have a distro with rc ("run commands") such as Gentoo (settings in /etc/init.d) (https://forums.gentoo.org/viewtopic-t-854138-start-0.html) run:

rc-update add mongodb default 
/etc/init.d/mongodb start 

In a distro/version of FreeBSD which still has rc (check whether your version switched to systemd, otherwise see below):

• add the following line to /etc/rc.conf:

  mongod_enable="YES"

• then:

  sudo service mongod start

After starting the service, an unpriveleged user can use mongo, and each user will have separate data.