Some Flume Configurations

FLUME_LOG_DIR=/var/log/flume-ng
FLUME_CONF_DIR=/etc/flume-ng/conf_${FLUME_AGENT_NAME}
FLUME_RUN_DIR=/var/run/flume-ng
FLUME_HOME=/usr/lib/flume-ng

Starting flume in background
nohup flume-ng agent -n CollectionFlume -c conf -f conf/flume-conf.properties > /dev/null 2>&1 &

or better

 "nohup /opt/cloudera/parcels/CDH/lib/flume-ng/bin/flume-ng agent -c /opt/cloudera/parcels/CDH/lib/flume-ng/conf -f /opt/cloudera/parcels/CDH/lib/flume-ng/conf/flume-conf.properties -n agent >/dev/null 2>&1 "


Process 

ps auxwww|grep -i 'flume-ng'