fuse.md: Linux-related clarifications

docs/fuse.md

@@ -44,18 +44,22 @@ sudo chown <username>:<groupname> /etc/fuse.conf
 
 ## Troubleshooting
 
-### Getting `Permission denied` or `fusermount: user has no write access to mountpoint` error
+### Getting `Permission denied` or `fusermount: user has no write access to mountpoint` error in Linux
 
 Verify that the config file can be read by your user:
 ```sh
-ls -l /etc/fuse.conf
+sudo ls -l /etc/fuse.conf
 -rw-r----- 1 root fuse 216 Jan  2  2013 /etc/fuse.conf
 ```
-In most distributions group named `fuse` will be created during installation.
+In most distributions group named `fuse` will be created during installation. You can check with:
 
-If that is the case, just add your regular user to the `fuse` group:
 ```sh
-usermod -G fuse -a <username>
+sudo grep -q fuse /etc/group && echo fuse_group_present || echo fuse_group_missing
+```
+
+If group is present, just add your regular user to the `fuse` group:
+```sh
+sudo usermod -G fuse -a <username>
 ```
 
 If not, create `fuse` group (add your regular user to it) and set necessary permissions, for example:
@@ -66,6 +70,9 @@ sudo chgrp fuse /ipfs /ipns
 sudo chmod g+rw /ipfs /ipns
 ```
 
+Note that the use of `fuse` group is optional and may depend on your operating system.
+It is okay to use a different group as long as proper permissions are set for user running `ipfs mount` command.
+
 ### Mount command crashes and mountpoint gets stuck
 
 ```