I have a simple log file stored on my computer, is there a way I could just import it into graylog and play with it ? or as I have read, I have to configure a collector that will be sending logs to Graylog directly ?
Is there a way to simply upload my .log file ?
You can use any collector, like NXLog, Filebeat, Logstash, Flume, etc. to send file contents to Graylog.
In some cases, you can create a Raw/Plaintext input in Graylog and send the files contents via telnet or netcat.