mongodb start and stop commands

Startup:
1. Start through command parameters: mongod -fork --dbpath=/app/hadoop/db --logpath=/app/hadoop/db/m_log.log --logappend --port=27018
2. Start through configuration file
    Configuration file:
    dbpath=/data/mongodb/data
    logpath=/data/mongodb/log/mongo30.log
    port=30000
    logappend=true
    fork=true
    journal=true
    Command: mongod -f /data/mongodb/mongo.conf
   
stop:
    Under Linux, everyone likes to kill -9 PID directly to stop many services, but if you execute kill -9 PID for MongoDB, an error may be displayed at the next startup, causing the service to fail to start. At this time, you can execute:
        rm -f /app /hadoop/db/mongod.lock 
    is to delete the mongod.lock file in the specified data directory.
   
    Normal stop method:
    kill -2 PID
    or
    mongo -host ip:port 
    first connect to the service that needs to be stopped, then:
    use admin 
    db.shutdownServer(); 
    This can also stop the service normally.