That is because the permission setting on /var/lib/mongodb and /tmp/mongodb-27017.lock are wrong. You will have to change the owner to monogdb user.

chown -R mongodb:mongodb /var/lib/mongodb
chown mongodb:mongodb /tmp/mongodb-27017.sock

$ sudo rm -rf /tmp/mongodb-27017.sock
$ sudo service mongod start
[ok]

Hi @tamburrinipietro89

The error is error command line: unrecognized line in 'storage:'

Can you post your /etc/systemd/system/mongodb.service and /etc/mongod.conf since one of them must have a reference to storage:

mongodb.service

[Unit]
Description=High-performance, schema-free document-oriented database
After=network.target

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --quiet --config /etc/mongod.conf

[Install]
WantedBy=multi-user.target

mongod.conf

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: /var/lib/mongodb
  journal:
    enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/mongod.log

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1


#processManagement:

#security:

#operationProfiling:

#replication:

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

There’s a mongod.log file but it only say things about data received qhen the db was working. Anyway i once runned it with sudo wich isn’t a good practice, can be that i introduced some locks or things like that? I tried to uninstall and make a fresh install but nothin. Is there a way to remove mongodb and everything like it was never installed? Im yelling angains the terminal since a week or two