I was able to resolve the issue by copying the name given in the NetBIOS Name field in the answer given by rubixibuc and pasting it into a run dialog, typing \\ and then the NetBIOS Name (so in rubixibuc's example the full path would be \\MACBOOKPRO-D04A)
To open the Run dialog, simply type +R
Looking at your command to mount your Linux drive on Mac,
sshfs firstname.lastname@example.org:/ localMountDir
it looks like you are specifying that you want to mount the root of the Linux filesystem (that’s the :/ part). In general, most operating systems assign ownership of root-level directories to a privileged user (i.e., not you). In the case of Linux, root is the ...
I'd suggest giving a try at the later: https://support.apple.com/en-us/HT202528
Although the use is intended if you'd be using a Mac as file server it nevertheless should provide a higher priority for network I/O on clients.
Read NVRAM settings:
Will throw the following error if nvram is set to defaults:
nvram: Error getting variable - '...
Mounting an SMB share as a local folder seems more reliable than using the Finder sidebar or even COMM-K to connect. It shouldn't be, right, but it is for me. Half the time, the Finder sidebar option won't connect even though I can still access the networked folder. Here's an example of using mount_smbfs:
mount_smbfs //Guest@10.0.1.1/myshare /Users/user/...