Ubuntu 17.04: Install sshfs for SSH client

Table of Contents

1 Install sshfs

Install sshfs package.

$ sudo apt install -y sshfs

2 Mount SSH with sshfs

Mount SSH to <path> with sshfs. You need write permission to <path>.

$ sshfs <server> <path>

This article mounts to $HOME/mnt.

$ mkdir $HOME/mnt$ sshfs ssh-server.hiroom2.com:$HOME $HOME/mntThe authenticity of host ‘ssh-server.hiroom2.com(’ can’t be established.ECDSA key fingerprint isSHA256:jnXzkA7FZ1MW7K2zr9lM87nLt/IxJBIqKyt9EMF7mbc.Are you sure you want to continue connecting (yes/no)? [email protected]’s password:

$HOME in SSH server can be accessed.

$ ls $HOME/mntbin Documents examples.desktop Pictures src VideosDesktop Downloads Music Public Templates

3 Generate SSH key

Generate SSH key for accessing from root user on SSH client to root user on SSH server without password authentication.

Run ssh-keygen on SSH client for generating SSH key.

$ # Run the following command on SSH client.$ sudo ssh-keygen -t rsa -f /root/.ssh/id_rsa -N “”$ sudo cat /root/.ssh/id_rsa.pubssh-rsa AAAAB3Nza<snip> root@ssh-client

Copy public key generated by ssh-keygen on SSH client to authorized_keys on SSH server.

$ # Run the following command on SSH server.$ cat <<EOF | sudo tee /root/.ssh/authorized_keysssh-rsa AAAAB3Nza<snip> root@ssh-clientEOF

You need to access from SSH client to SSH server for adding SSH server fingerprint to known_hosts. This article disables checking finngerprint to SSH server.

$ # Run the following command on SSH client.$ cat <<EOF | sudo tee /root/.ssh/configHost 192.168.11.* StrictHostKeyChecking no UserKnownHostsFile=/dev/nullHost *.hiroom2.com StrictHostKeyChecking no UserKnownHostsFile=/dev/nullEOF

4 Mount SSH on boot

Add mount entry to /etc/fstab. For avoiding mounting NFS before network initialization, you need to add _netdev option. For making x-systemd.automount to mount NFS, you need to add x-systemd.automount to option.

$ SSH_SERVER=ssh-server.hiroom2.com$ SSH_DIR=/$ cat <<EOF | sudo tee -a /etc/fstab${SSH_SERVER}:${SSH_DIR} /mnt fuse.sshfs _netdev,x-systemd.automount 0 0EOF

For access with other user, use <user>@<server>. identityfile option changes SSH key. allow_other, uid and gid option changes ownership at mount point. But if home directory permission is 755, mount point will be accessed by other user.

$ OPT=_netdev,x-systemd.automount,identityfile=/home/hiroom2/.ssh/id_rsa$ OPT=${OPT},allow_other,uid=hiroom2,gid=hiroom2$ mkdir -p /home/hiroom2/mnt$ cat <<EOF | sudo tee -a /etc/fstabhiroom2@${SSH_SERVER}:/home/hiroom2 /home/hiroom2/mnt fuse.sshfs ${OPT} 0 0EOF

For avoiding access by other user, change home directory permision to 700 or create 700 directory between home directory and mount point.

$ mkdir -p /home/hiroom2/guard/mnt$ chmod 700 /home/hiroom2/guard$ cat <<EOF | sudo tee -a /etc/fstabhiroom2@${SSH_SERVER}:/home/hiroom2 /home/hiroom2/guard/mnt fuse.sshfs ${OPT} 0 0EOF

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