Could not create directory ‘/home/server/.ssh‘

     DISPLAY               The DISPLAY variable indicates the location of the X11 server.  It is automatically set by ssh to point to a value of the form
                           ``hostname:n‘‘, where ``hostname‘‘ indicates the host where the shell runs, and `n‘ is an integer >= 1.  ssh uses this special value to
                           forward X11 connections over the secure channel.  The user should normally not set DISPLAY explicitly, as that will render the X11 con-
                           nection insecure (and will require the user to manually copy any required authorization cookies).

     HOME                  Set to the path of the user‘s home directory.

     LOGNAME               Synonym for USER; set for compatibility with systems that use this variable.

     MAIL                  Set to the path of the user‘s mailbox.

     PATH                  Set to the default PATH, as specified when compiling ssh.

     SSH_ASKPASS           If ssh needs a passphrase, it will read the passphrase from the current terminal if it was run from a terminal.  If ssh does not have a
                           terminal associated with it but DISPLAY and SSH_ASKPASS are set, it will execute the program specified by SSH_ASKPASS and open an X11
                           window to read the passphrase.  This is particularly useful when calling ssh from a .xsession or related script.  (Note that on some
                           machines it may be necessary to redirect the input from /dev/null to make this work.)

     SSH_AUTH_SOCK         Identifies the path of a UNIX-domain socket used to communicate with the agent.

     SSH_CONNECTION        Identifies the client and server ends of the connection.  The variable contains four space-separated values: client IP address, client
                           port number, server IP address, and server port number.

     SSH_ORIGINAL_COMMAND  This variable contains the original command line if a forced command is executed.  It can be used to extract the original arguments.

     SSH_TTY               This is set to the name of the tty (path to the device) associated with the current shell or command.  If the current session has no
                           tty, this variable is not set.

     TZ                    This variable is set to indicate the present time zone if it was set when the daemon was started (i.e. the daemon passes the value on
                           to new connections).

     USER                  Set to the name of the user logging in.

/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
/home/server/.Private on /home/server type ecryptfs (ecryptfs_check_dev_ruid,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_unlink_sigs,ecryptfs_sig=a1f33ec3321f0ef9,ecryptfs_fnek_sig=705c22000a171cfe)

sudo umount /home/server

server@gitlabserver:~$ ls -a
.  ..  Access-Your-Private-Data.desktop  
.bash_history  .ecryptfs  .kde
.Private  README.txt  .viminfo