LibBPQ logs most bits to /var/log/syslog This also includes some very chatty 'Heartbeats' May 13 22:38:39 linbpq_box1 LINBPQ[5905]: BPQ32 Heartbeat Buffers 998 APRS Queues 0 0#015 To save SD card writes, you can re-direct this out to RAM (/run - or somewhere else that is RAM on your system) To do this, you need to create a new file /etc/rsyslog.d/00-linbpq-buffers.conf and add to it: if $msg contains 'BPQ32 Heartbeat' then /run/linbpq-buffers.log & STOP ( note, if you are on an older version on rsyslog, you need & ~ instead of & STOP ) Then restart rsyslogd sudo systemctl restart rsyslogd This may fill up your RAM, so you can do several things * Create a CRON job to delete this file (or archive it etc) * use logrotate To use logrotate, to compress the files and only keep 7 days: Create a file cat /etc/logrotate.d/linbpq-buffers Add this to the file /run/linbpq-buffers.log { rotate 7 daily missingok compress }