RHEL CERTIFIED SPECIALIST IN LINUX DIAGNOSTICS AND TROUBLESHOOTING - EX342
NOTES

uptime
df -h
free -hg  /free -hg : megabytes or gigabytes

lsof -i: display a list of open files -i show open network connections 

umount  /run/user/1001/gvfs
lsof | less - see if errors are made
lsof -u cloud_user | wc  -l
OUTPUT 6317
su - cloud_user -c ulimit ' -Hn' 

OUTPUT 26144
I have verified the exact  number of open files vs file limits
lsof -i | less - LIST OPEN NETWORK CONNECTIONS