[linux] connect to host localhost port 22: Connection refused

While installing hadoop in my local machine , i got following error

ssh -vvv localhost 
OpenSSH_5.5p1, OpenSSL 1.0.0e-fips 6 Sep 2011 
debug1: Reading configuration data /etc/ssh/ssh_config    
debug1: Applying options for * 
debug2: ssh_connect: needpriv 0 
debug1: Connecting to localhost [127.0.0.1] port 22. 
debug1: connect to address 127.0.0.1 port 22: Connection refused 
ssh: connect to host localhost port 22: Connection refused

can some one help me to resolve this error , than changing port number

If you restart service then it will work

$ service sshd restart

then check

$ ssh localhost

It will work

Make sure that /etc/hosts.allow contains:

ssh:ALL:allow
sshd:ALL:allow

OR

ssh:localhost:allow
sshd:localhost:allow

OR - some other variant

ssh:{host1,host2,host3...}:allow
sshd{host1,host2,host3...}:allow

INSURE that the first line in the file DOES NOT begin with ALL:ALL:DENY

NOTHING will be able to communicate with the host... on any port.

I did all the suggestion above and it did not work. Then I restart the ssh service and it works. This is what I do:

service ssh restart

Then I redo

ssh localhost

Now I can connect to my localhost. Hope it helps

A way to do is to go to terminal

$ sudo gedit /etc/hosts

***enter your ip address ipaddress of your pc  localhost 
    ipaddress of your pc  localhost(Edit your pc name with localhost) **

and again restart your ssh service using:

$ service ssh restart

Problem will be resolve. Thanks

What worked for me is:

sudo mkdir /var/run/sshd
sudo apt-get install --reinstall openssh-server

I tried all the above mentioned solutions but somehow this directory /var/run/sshd was still missing for me. I have Ubuntu 16.04.4 LTS. Hope my answer helps if someone has the same issue. ubuntu sshxenial

It might be caused by some of the following:

1. SSH Server is not installed (only SSH Client), try: apt-get install ssh openssh-client openssh-server
2. Connection is blocked by iptables (Firewall), try: ufw allow ssh

If install Hadoop on Mac OSX, make sure turn on Remote Login under System Preferences then File Sharing. This worked on my machine.

If you're certain that you have installed ssh, then it's possible that ssh and/or sshd has been terminated or the server service hasn't been started. To check whether these processes are running use:

//this tells you whether your ssh instance is active/inactive
sudo service ssh status

OR

//this list all running processes whose names contain the string "ssh"
sudo ps -A | grep ssh

It's likely that ssh would be active and running but sshd would not. To enable them:

sudo service ssh start

NB; - some systems have a restart option but mine didn't

I used:

sudo service ssh start

Then:

ssh localhost

For what its worth I got the following error trying to ssh into my local machine, running Ubuntu 16.04 Xenial, from a vm.

 ssh: connect to host 192.168.144.18 port 22: Connection refused

It got immediately fixed with:

sudo apt-get install ssh

Take note, Before fix: 'which sshd' returned nothing and 'which ssh' returned

/usr/bin/ssh

And After the fix: 'which sshd' returned

/usr/sbin/sshd

Check if this port is open. Maybe your SSH demon is not running. See if sshd is running. If not, then start it.

try sudo vi /etc/ssh/sshd_config

in first few lies you'll find

Package generated configuration file

See the sshd_config(5) manpage for details

What ports, IPs and protocols we listen for

Port xxxxx

change Port xxxxx to "Port 22" and exit vi by saving changes.

restart ssh sudo service ssh restart

For Linux:

1. Remove SSH with the following command:

   sudo apt-get remove openssh-client openssh-server
   

2. Install SSH again with:

   sudo apt-get install openssh-client openssh-server
   

Try installing whole SSH package pack:

sudo apt-get install ssh

I had ssh command on my Ubuntu but got the error as you have. After full installation all was resolved.

if you are using centOS or Red Hat, you should first update SElinux. Execute the following statement

ausearch -c 'sshd' --raw | audit2allow -M my-sshd

then you need to execute

semodule -i my-sshd.pp

good luck

Do you have sshd installed? You can verify that with:

which ssh
which sshd

For detailed information you can visit this link.

Check file /etc/ssh/sshd_config for Port number. Make sure it is 22.

You may should edit your /etc/hosts. For example if my hostname is ub0, but the hostname in /etc/hosts is localhost, it may occur

connect to host ub0 port 22: Connection refused

Because the hostname in /etc/hosts is localhost not ub0.

So, you should be careful the hostname when building up distributed clusters.

1. Remove SSH with the following command:

   sudo apt-get remove openssh-client openssh-server
   

2. Install SSH again with:

   sudo apt-get install openssh-client openssh-server
   

It will solve your problem.

On mac go to system settings->network->sharing and allow remote login.

try ssh localhost

You should be good.

Actually i solved this, I just installed shh daemon.

in terminal :

sudo apt-get install openssh-server

If you still face problems, try the following:

sudo ufw enable    
sudo apt-get install openssh-server

This might work too.

if you are able to ping and not able to ssh, then it is a firewall. The firewall on 18.4 (not sure about other versions) in on by default and only allow port 8080.

Here how you fix it

https://linuxconfig.org/how-to-enable-disable-firewall-on-ubuntu-18-04-bionic-beaver-linux

I use a Mac, this worked for me:

Open System Preferences, then search for 'sharing'.

Choose Remote Login, make sure it is on and remember to add required users.

Got it from here

For my case(ubuntu 14.04, fresh installed), I just run the following command and it works!

sudo apt-get install ssh

you need to check the configuration in sshd_config ListenAddress 0.0.0.0 update this and restart the sshd service that will resolve the issue.

1. Before installing/reinstalling anything check the status of sshd . . .

sudo systemctl status sshd

2. You should see something like . . .

? sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; disabled; vendor prese>
   Active: inactive (dead)
     Docs: man:sshd(8)
           man:sshd_config(5)

3. Just enable and start sshd

sudo systemctl enable sshd
sudo systemctl start sshd