connect to host localhost port 22: Connection refu

问题:

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

回答1:

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

回答2:

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.

回答3:

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

which ssh
which sshd

For detailed information you can visit this link.

回答4:

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.

回答5:

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

回答6:

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.

回答7:

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

回答8:

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

回答9:

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

sudo apt-get install ssh

回答10:

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

try ssh localhost

You should be good.

回答11:

I used:

sudo service ssh start

Then:

ssh localhost

回答12:

My port number is different. i tried using

ssh localhost -p 8088

this worked for me

回答13:

If you still face problems, try the following:

sudo ufw enable    
sudo apt-get install openssh-server

This might work too.

回答14:

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

回答15:

Actually i solved this, I just installed shh daemon.

in terminal :

sudo apt-get install openssh-server

回答16:

If you restart service then it will work

$ service sshd restart

then check

$ ssh localhost

It will work

回答17:

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

回答18:

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

回答19:

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

回答20:

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.

回答21:

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
   

回答22:

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.

回答23:

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

回答24:

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