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@@ -1,242 +0,0 @@ -SSHFS FAQ -========= - -1. I've found a bug and there's no solution in this FAQ, what - should I do? -2. Advantage of sshfs over NFS and Samba -3. Create the device node -4. mv fails with "Operation not permitted" -5. Configuring the ssh connection -6. What are the no_readahead and sshfs_sync options for? -7. Why does df return strange values on partitions mounted via - sshfs? -8. How do I specify the remote mount point (since the example - defaults to the home directory) -9. sshfs hangs after a while -10. Following symlinks on the server side -11. Making absolute symlinks work -12. Mounting as root -13. Exporting via NFS -14. Automatical mounting using /etc/fstab -15. Why does SVN (etc...) fail with permission denied? -16. Why does SVN (etc...) fail to rename files? -17. Is there some neat way to do it in reverse? -18. Might it be reasonable to disallow loops? -19. How to mount through an intermediary ssh server, eg: - localhost -> A -> B; mount B from localhost -20. Alternative Solution -21. I seem to have successfully mounted a remote directory, but - performing an `ls -l` on the directory above the mount point shows - the mount point's attributes as `? ? ? ? ? ?`. Nothing shows up in - the directory either. What am I doing wrong? - --------------------------------------------------------------------------- - -1. I've found a bug and there's no solution in this FAQ, what should I do? - - Please report the bug in the Github issue tracker: - https://github.com/libfuse/sshfs/issues - - Also logs with debugging output can be useful for diagnosing the - problem. Try running sshfs with the following options: - sshfs -odebug,sshfs_debug,loglevel=debug ... - - Doing strace on the application which fails may also sometimes help: - strace -f -o /tmp/strace application args ... - - Note that large messages (over 40k) will be rejected from the mailing - list. So try to keep the logs as short as possible. - - -2. Advantage of sshfs over NFS and Samba - - Users can mount remote resources they already have ssh access to, - without requiring the remote machine to export the resource. - - The remote resource can be mounted when it is needed in a location - that is convenient for the user at that time, without needing to rely - on a central, root-controlled file system table. - - Automatic mounting, if desired, can be added to a shell script such as - .bashrc (provided authentication is done using RSA/DSA keys). - - Resources can be mounted over slow and unreliable (distant) - connections. - -3. Create the device node - - If you don't use udev, you may get this error message: - - fusermount: failed to open /dev/fuse: No such device or address - - Before loading the fuse kernel module, create the device node - manually: - - mknod -m 666 /dev/fuse c 10 229 - -4. mv fails with "Operation not permitted". - - Use -o workaround=rename (requires sshfs version >= 1.3). - -5. Configuring the ssh connection - - In addition to flags like -C, -p, and -o SSHOPT...=, you may find it - easier to edit your /.ssh/config file. You can add an entry with any - customization you want, test it with ssh, and finally use it with - sshfs. As a bonus, you get a short mnemonic for your configuration. - -6. What are the no_readahead and sshfs_sync options for? - - These disable read and write optimizations respectively. They don't - really make sense unless you're doing something special. - -7. Why does df return strange values on partitions mounted via sshfs? - - Because the SFTP protocol doesn't have a statfs operation this is - currently not possible to display proper usage on remote partition. - -8. How do I specfy the remote mount point (since the example defaults to the - home directory) - - The example shows: - sshfs hostname: mountpoint - - To specify a remote mount point use: - sshfs hostname:remotemountpoint mountpoint - - This might be obvious to others, but I ended up looking up the - interface to sftp to see if I could learn how to specify the remote - mount point, then thought about the way that scp specifies the remote - directory, and it worked. - -9. sshfs hangs after a while - - Mounting works fine, I can use the files in Mountpoint as good as any - other files on my system, but after bit of time, changing nothing on - the remote files sshfs crashes. This means, I can not cd into the - Mountpoint (xterm hangs, nautilus hangs... every program trying to - access the Mountpoint gets stuck, and won't return). - - Solution: add - ServerAliveInterval 15 - - in your .ssh/config (or use -o ServerAliveInterval=15 on the sshfs - command line but I did not test that solution). This will force the - ssh connection to stay alive even if you have no activity. - -10. Following symlinks on the server side - - The -o follow_symlinks option will enable this. - -11. Making absolute symlinks work - - Use the -o transform_symlinks option, which will transform absolute - symlinks (ones which point somewhere inside the mount) into relative - ones. - -12. Mounting as root - - Generally it's not possible to use an sshfs mount as a "real" - filesystem shared between multiple users. Some of this functionality - can be enabled with the -o allow_other and -o default_permissions - options, but files will not be created with the correct ownership, - etc... - -13. Exporting via NFS - - Use the userspace NFS daemon http://sourceforge.net/projects/unfs - -14. Automatical mounting using /etc/fstab - - A line in /etc/fstab has the following format: - sshfs#USERNAME@REMOTE_HOST:REMOTE_PATH MOUNT_POINT fuse SSHFS_OPTIONS 0 0 - - eg. - sshfs#guest@guest.login.com:data /mnt/guest fuse \ - uid=1003,gid=100,umask=0,allow_other 0 0 - -15. Why does SVN (etc...) fail with permission denied? - - This is a bug that happens when an application creates a read-only - file opened for writing (e.g. open("foo", O_WRONLY|O_CREAT, 0444)) - - It has been fixed in sshfs version 1.3, but also requires FUSE version - >=2.5.X and Linux kernel version >=2.6.15. - -16. Why does SVN (etc...) fail to rename files? - - $ svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdelibs - svn: Can't move 'kdelibs/.svn/tmp/entries' to 'kdelibs/.svn/entries': - Operation not permitted - - The reason is that SFTP protocol version 3 (which is implemented by - OpenSSH's sftp-server) defines the rename operation slightly - differently than POSIX. The difference is that renaming to an existing - file or directory will fail instead of atomically replacing the old - file. - - The -o workaround=rename option will try to emulate POSIX rename - semantics, but it cannot guarantee atomicity. In most of the cases - this doesn't matter, and things will work fine with this option. - -17. Is there some neat way to do it in reverse? - - You want to mount a USB thumb drive onto a file server that is rather - remote. - - Assuming this is difficult because the laptop with the thumb drive is - sitting behind NAT, firewalls, etc. then you need to create a - port-forward: - client$ ssh -R 2222:localhost:22 server - server$ sshfs -p 2222 localhost:/media/usb1 myusb1 - - (Now, is there is there a smarter way that does not involve port - opening login permissions in an undesireable direction?) - -18. Might it be reasonable to disallow loops? - - sshfs localhost:/mnt /mnt - - This seems to produce undesirable results. --JoshuaRodman - -19. How to mount through an intermediary ssh server, eg: localhost -> A -> B; - mount B from localhost - - Start by mounting the folder you need that is on "a" to a folder on - "b" then mount the new folder that is on "a" to a folder on localhost. - - IE: (These are NOT real commands, but a sequence of steps. - A mounts B:/home/x on /mnt/Bx - localhost mounts A:/mnt/Bx on ~/mydir - -20. Alternative Solution: - - 1) Create a shell script to wrap the tunneling of one ssh command over - another, - $ cat >Atunnel <<EOF - #!/bin/bash - ssh -q A ssh -q "$@" - EOF - $ chmod u+x Atunnel - - N.B. make sure to put this somewhere on your path. 2) sshfs mount as - normal but using this script as the ssh command. - $ sshfs -o ssh_command='Atunnel' B: ~/mydir - -21. I seem to have successfully mounted a remote directory, but performing an - `ls -l` on the directory above the mount point shows the mount point's - attributes as `? ? ? ? ? ?`. Nothing shows up in the directory either. What - am I doing wrong? - - You probably specified a remote path with the tilde (~) in it. This - doesn't seem to work. Instead, specify an absolute remote path: - sshfs username@remote.host:/home/username/whatever my/mount - - What options do i use to make playing media files (music) over sshfs more - efficient? - - MacFUSE doesn't seem to let me move files from one directory to another. It - first asks for my local user password (i.e. the password on my Macbook Pro) - and then produces the error message "The operation cannot be completed - because one or more required items cannot be found. (Error code -120). - |