The basic and the most common command is:
1sudo mount -av
To make sure it reloads config for auto-mount drives as well, and when traditional mount is not working, use:
1sudo systemctl daemon-reload
if the above doesn’t work, try:
1sudo systemctl daemon-reload
2sudo systemctl restart remote-fs.target
to reload an entry to mount a local filesystem:
1sudo systemctl daemon-reload
2sudo systemctl restart local-fs.target
If you have removed entries from fstab and the above commands don’t work, try restarting the machine.