If WebLogic is booting slowly on Linux, it might be a low entropy situation. To view your entropy available:

sudo watch -n 1 cat /proc/sys/kernel/random/entropy_avail

If entropy is less than 1000, you should install a tool to help generate more entropy.

haveged

haveged is one tool to help generate entropy on Linux.

Linux 6

sudo rpm -Uvh <https://download.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm>
sudo yum install haveged -y
sudo chkconfig haveged on
sudo /usr/sbin/haveged -w 1024

Linux 7

sudo rpm -Uvh <http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm>
sudo yum install haveged -y
sudo systemctl enable --now haveged

Verify Entropy Levels

Test that entropy is added to the system.

cat /dev/random | rngtest -c 1000