Today, the server cannot SSH, and the VNC operation command prompts fork: cannot allocate memory
free to check the memory (note that the command may take a few more times to come out)
View the maximum number of processes sysctl kernel.pid_max
ps -eLf | wc -l to view the number of processes
Confirm that the number of processes is full
After modifying the maximum number of processes, the system restores
echo 1000000 > /proc/sys/kernel/pid_max
Permanent
echo "kernel.pid_max=1000000 " >> /etc/sysctl.conf
sysctl -p
