CentOS 7: error: system does not fully support snapd: cannot read the value of fs.may_detach_mounts kernel parameter

snapd
4

Thanks for the help! Upgrading kernel certainly fixed it.

[user@localhost ~]$ snap --version
snap    2.42.2-1.el7
snapd   2.42.2-1.el7
series  16
centos  7
kernel  5.4.1-1.el7.elrepo.x86_64

But then received this warning. (Restarting or Logout didn’t help)

user@localhost ~]$ sudo snap install redis-desktop-manager
2019-11-29T13:45:09-08:00 INFO Waiting for restart...
Warning: /var/lib/snapd/snap/bin was not found in your $PATH. If you've not restarted your session
         since you installed snapd, try doing that. Please see https://forum.snapcraft.io/t/9469
         for more details.

I had to add /var/lib/snapd/snap/bin in the $PATH variable

vi ~/bash_profile

export PATH=$PATH:/var/lib/snapd/snap/bin

That fixed the warning from showing up. In case any one else is running into similar issues.