From the manpage:
Specifies whether root can log in using ssh(1). The argument
must be “yes”, “without-password”, “forced-commands-only”, or
"no”. The default is “yes”.
If this option is set to “without-password”, password
authentication is disabled for root.
If this option is set to “forced-commands-only”, root ...
By default PasswordAuthentication is set to yes, even if you comment it out in /etc/ssh/sshd_config.
You'll need to explicitly set PasswordAuthentication no to allow only Public Key Authentication.
# To disable tunneled clear text passwords, change to no here!
NOTE (man sshd_config): PasswordAuthentication specifies whether ...
This is the process:
Add the user to the group: sudo usermod -aG www blub as in Whats the simplest way to edit and add files to "/var/www"?
or just use sudo adduser <username> www-data
Install vsftpd sudo apt-get install vsftpd
Configure vsftpd for remote access: sudo nano /etc/vsftpd.conf and inside the file set
This was solved for me by following the instructions on http://peter-butkovic.blogspot.com/2013/08/tail-inotify-resources-exhausted.html
Permanent solution (preserved across restarts)
fixed the limit value permanently (even between restarts).
then do a
Actually this setting does pretty much nothing if you are using PAM authentication. At the bottom of the sshd_config configuration file you will find:
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
Artyom answer is correct.
I'd just like to point that there is also the possibility to opt for a 'white-list' approach instead of the 'black-list' one by putting a line like this in /etc/ssh/sshd_config:
AllowUsers AuthorizedUser1 AuthorizedUser2
and reloading ssh service (service ssh restart)
Then every other user will be denied ssh access (be careful ...
Try un-installing and then installing openssh-server:
sudo apt-get remove openssh-client openssh-server
sudo apt-get install openssh-client openssh-server
This worked for me. If you still can not connect, try
sudo ufw status verbose
and let us know what the output is.
According to man 5 sshd_config:
%h is replaced by the home directory of the user being authenticated
This means the file will be /home/user/.ssh/authorized_keys. If the .ssh directory is missing (which seems normal if not previously configured) you can create it and also the authorized_keys file within and then populate the file's contents with your ...
There are two ways to configure ssh to require both a public key and a password or passphrase.
The difference between the password and the passphrase:
The password in this context is the password assigned to the user in the server computer (the board). If the board has only one user account, then it will have only one password. If the board has multiple ...
I think that answer is not complete (it doesn't say anything about the maximum limit of files open on the system).
There are two limits regarding the maximum number of open files:
Maximum limit of files open per process.
You can see which is the value of this limit using: ulimit -n
You can change this limit using: ulimit -n new_limit_number
Here is a ...
The problem usually arises if your home directory is encrypted. The usual solution is to put your keys in a directory other than your home directory, and point your sshd_config file to it.
Move your authorized_keys file on the server from /home/buck/.ssh/authorized_keys to something like /etc/ssh/keys/buck/authorized_keys
set the permissions ...
This is documented in man systemctl:
systemctl disable ssh
prevents ssh service from automatic starting. But this is the way systemd does it, but ubuntu does not accept it and they have to do it their own way:
Official documentation: https://wiki.ubuntu.com/SystemdForUpstartUsers#Automatic_starting
According to this you should create unit override ...
note to the reader:
for me (ubuntu 14.xx) only Bryan Agee's answer worked:
/etc/init/ssh.conf: comment out the "start on filesystem or runlevel..." line
why won't the others do?
sudo mv /etc/init/ssh.conf /etc/init/ssh.conf.disabled
will result in completly deactivating the service. It is then not startable through "service ssh start" anymore.
First make sure that ssh service running on 192.168.1.7 or not..it is possible that system doesn't have an SSH daemon, so you need to install ssh on that system.
sudo apt-get install openssh-server
If it's already installed, run sudo service ssh restart, then comment here with the output of this command from both the systems.
Ubuntu ssh service will start with ssh, not sshd.
sudo apt-get remove --purge openssh-server
sudo apt-get install openssh-server
sudo service ssh restart
To check its status:
sudo service ssh status
Config file can be found at /etc/init/ssh.conf
Detail about remove and purge:
remove - Does NOT remove including configuration files
Most likely, you've run out of your inotify watches. Probably, you're running some file synchronization tools(eg. Dropbox) in background?
In Linux, the internal implementation of tail -f command uses the inotify mechanism by default, so as to monitor file changes. If you've run out of all the inotify watches(8192 by default), then inotify -f have to ...
Anything in log files, particularly /var/log/auth.log? You might also double-check permissions on the .ssh directory and files.
I haven't had to modify sshd_config for this kind of access, myself. I am wondering if your modification broke things, especially the AuthorizedKeysFile line.
Typically, you would want to put the authorized_keys under $USER/....
Eric Carvalho's answer works for pre 15.04 but they deprecated and then removed upstart from Ubuntu, SystemdForUpstartUsers.
These steps have been adapted to work with systemd.
Copy the SSH configuration file:
sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config_external
Copy the systemd configuration file:
sudo cp /lib/systemd/system/ssh.service /lib/...
If I am not sure if a program reads a specific config file (or in which order), I try to trace the open syscalls with strace. To do this stop the ssh daemon. Then start it manually in the terminal by:
strace -e open -ostrace.out /usr/sbin/sshd
After it has started you should have a file in your current working directory called strace.out. In my case it ...