Hi,
I am running the below command on CentOS Linux release 7.6.1810 (Core)
# df -hT --total
Filesystem Type Size Used Avail Use% Mounted on
/dev/xvda1 xfs 150G 8.0G 143G 6% /
devtmpfs devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs tmpfs 7.8G 817M 7.0G 11% /run
tmpfs tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
tmpfs tmpfs 1.6G 0 1.6G 0% /run/user/995
tmpfs tmpfs 1.6G 0 1.6G 0% /run/user/1000
total - 185G 8.8G 176G 5% -
#
Does devtmpfs and tmpfs use underlying hard disk storage or does it uses
Physical Memory (RAM). What is the purpose of devtmpfs which is mounted on
/dev, tmpfs mounted on /dev/shm and so on and so forth. What is the
difference between devtmpfs and tmpfs?
I will appreciate if anyone can help me understand the above output.
Thanks in Advance and i look forward to hearing from you.
Best Regards,
Kaushal