Questions tagged [ssh]
SSH, or "Secure Shell", is a networking protocol for securely connecting to a remote computer over an unsecure network. SSH is also the name of the default command-line SSH client. This tag is for questions involving using and troubleshooting SSH connections, as well as setting up and configuring SSH for applications which use the SSH protocol. This tag should be used with other tags to better identify the environment of the problem.
6,219
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ssh, telnet, apache and shellinabox servers blocked
I've been operating a "BBS-style" system on a Windows 11 computer for the last few years. Access came courtesy of WSL ssh, telnet, shellinabox and (for the web page) apache2. All was well ...
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345
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Cannot SSH into host on local network using TCP wrappers, despite allowing "sshd : LOCAL" in /etc/hosts.allow
I have two servers running ubuntu server 22.04.2 LTS on my local network, the servers have the following names and IP addresses: ubuntuserver100 - 192.168.50.100 and ubuntuserver101 - 192.168.50.101 ...
- 131
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378
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keychain vs ssh-ident for WSL2
I tried to avoid retyping ssh passphrase for git. Turns out there's no one way to it.
Not sure why keychain vs ssh-ident counts as opinion-based.
Also, that question was asked for a full linux system ...
- 121
1
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1
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675
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rsync error "rejecting excluded file-list"
So recently we updated 2 production servers and 1 development server for our websites. All are running Ubuntu 20.04. We also updated our build server that contains an installation of Jenkins. This one ...
- 121
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How do I setup ssh to prompt the user for more than 6 login attempts? I try to set it higher than 6 but it still stops at 6
I'm on ubuntu 22.04 LTS
https://manpages.ubuntu.com/manpages/impish/en/man5/sshd_config.5.html
MaxAuthTries is set at 16 but it still only prompts six times, I've tried it setting it higher but when I ...
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1
answer
207
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How to force synchronization of SSH autherized keys from Ubuntu One account to Ubuntu Core IoT device
I added a few more SSH keys to the Ubuntu One account (https://login.ubuntu.com/ssh-key).
Now, I want to make sure that these key are now sent down to the IoT devices that have Ubuntu Core installed ...
- 139
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2
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720
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SSH into server running xinetd throws error "kex_exchange_identification: read: Connection reset by peer"
I have two servers running ubuntu 22.04.2 LTS with openssh-server 1:8.9p1-3ubuntu0.1 installed. And on both servers I have installed the same admin user.
I want to test the legacy superdaemon xinetd ...
- 131
3
votes
1
answer
5k
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ssh: connect to host IP port 22: Connection refused
I'm trying to connect my laptop to another workstation with SSH protocol.
On both of my Windows PCs I installed Ubuntu to work from the terminal (WSL).
I've followed tutorials found online to do the ...
- 33
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354
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How to login with headless raspberry pi with Ubuntu 22.04.2 preinstalled?
I have installed ubuntu-22.04.2-preinstalled-desktop-arm64+raspi.img on my Raspberry Pi 4. I was trying to login with default credentials but looks like it is disabled.
I was trying to SSH the RasPi ...
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1
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70
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Cannot SSH to Ubuntu 18.04 After Switching from gdm3 to lightdm
Setup new Ubuntu 18.04 server with default gdm3. Installed openssh-server and was able to SSH to the server.
Installed Teamviewer 15 and encountered issue where it fails to connect, and the solution ...
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1
answer
1k
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Problem with SFTP: "Credentials were not accepted by the server"
I'm using an instance of Ubuntu 22.04.1 LTS via AWS, having enabled ports 22 and 443 in Ubuntu via ufw, and I'm using a Security Group with those same ports enabled.
Although I'm able to connect via ...
- 101
1
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1
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48
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Trying to install a video card but I have no video so I dont understand how to use additional drivers
I installed a GTX 970, but I have no video so I can't see. I guess I could SSH into my machine, but I do not know how to use the "Additional Drivers" while logged in on ssh?
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Ubuntu 22.04 LTS: SSH fails with `sign_and_send_pubkey: signing failed: agent refused operation`
I think my question is going to illustrate that I don't understand the relationship between ssh, ssh-agent, and gnome-keyring, but I've tried all of the fixes suggested in response to similar ...
- 256
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38
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When SSHed into Ubuntu Core how to know which container running from
I setup a Ubuntu Core 22 IoT device and I was able to SSH into it.
Since Ubuntu Core is a container operating system ,I wanted to know if I am SSHed into the device which container is my SSH session ...
- 139
-1
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1
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207
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Connection closed by port 80 ubuntu
i have executed this code to copy a folder by my desk to my ubuntu instance
francesco@AirdiFrancesco ~ % scp /Users/francesco/Desktop/chimica [email protected]:/home/ubuntu
only that after this ...
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2
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558
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Sqlyog not connected to ubuntu 22.04
Trying connect to mysql database with SQLYOG latest version but got this error message
"SSH ERROR: Fatal error network error : connection timed out"
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1
answer
50
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SSH strange usage text
I can't understand ssh usage text:
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
[-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
[-E log_file] [-e escape_char] [-...
- 15
1
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1
answer
456
views
SSH configured ports not working
Just installed Kubunut 22.10. I configured my /etc/ssh/sshd_config with a custom port.
# Snip
Port 5555
AllowUsers bob
# Snip
Then restart the daemon to refresh the configuration:
sudo ufw allow 5555
...
- 331
1
vote
2
answers
168
views
Root invalid default shell
We have a server with ssh enabled, and we have: PermitRootLogin: no, and a user that is not in sudoers file. Another administator set invalid Shell for root so I can't get root access anymore. When I ...
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0
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47
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SSH linux root user has clipboard access but I cannot access clipboard with user I created
I am using linux for the first time in my life. I bought a dedicated server and installed the Ubuntu 20.04 desktop LTS distribution in it. local system is windows. I created a user in linux and I ...
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404
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Can no longer use private key to SSH into Oracle Cloud server
This started yesterday after I attempted to execute an SCP command to send a tarball file I had created on my VM to my local machine, it came up with a text block informing me that the address was ...
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312
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Permission denied (publickey,password) Apache in Ubuntu 20.04LTS
I obtain the above mentioned error "Permission denied (publickey,password)" when trying to connect with ssh using my apache server. The framework I have used is Django and when deploying it ...
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19
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Unable to clone GitHub private repo "Permission denied (publickey). fatal: Could not read > from remote repository" [duplicate]
I asked for help on stackoverflow and I was told it is more than likely a Ubuntu problem and was recommended to ask here.
I'm trying to clone a private git repo to my web folder on Ubuntu. I've ...
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1
answer
716
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.ssh Directory has no id files after installing ssh service
I installed Ubuntu 22.04 and activated ssh service using
sudo apt install ssh
I tried to connect to my Ubuntu from my Windows using ssh via putty and it worked.
putty asked to trust Ubuntu's key and ...
- 187
2
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0
answers
254
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ssh login works only over local network after upgrading to 22.04.1. Keep getting "permission denied" when I try away from local network
Everything worked fine(ssh) until I finally decided to do the upgrade from 20.04.1 because I was tired of seeing the "do-upgrade" message everytime I was logging in my server. So after the ...
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1
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207
views
How do I make the ssh connection from my country only?
I tried to do this:
apt install geoip-bin geoip-database
I created this script in:
/usr/local/bin/
nano filter.sh
#!/bin/bash
ALLOW_COUNTRIES="SA"
if [ $# -ne 1 ]; then
echo "Usage: `...
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151
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Can't get ssh working on Ubuntu
I am trying to follow this guide to get phpMyAdmin installed on Ubuntu 20.04.
The first step is to set up a non-root user, and it's here that I'm stuck. I cannot log in to root@public_server_ip. I am ...
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0
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39
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What could cause a "user not in passwd" error when using su, ssh connection refusal on a Ubuntu 20.04 Web Server?
Something happened on one of our server running Ubuntu 20.04 that caused a co-worker who was logged in via ssh at the time to get a "user not in passwd" error when they tried to use the su ...
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0
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255
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How to unlock encrypted drives on a headless server?
I'm planning a homemade NAS-build with the following features:
Standard Ubuntu server installation with SSH server
Two Btrfs RAID1 drives on encrypted HDDs with dm-crypt
NFS shared folders from ...
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1
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30
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How can I ensure I can login to my laptop with a failing screen?
I have a Lenovo Flex with Ubuntu installed and the screen has been increasingly unreliable (flickering, sometimes just black). I'd like to ensure I can still use the computer when the screen dies, so ...
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3
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2k
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Ubuntu 22.10 RDP connection issues
I decided to set up a media box with Ubuntu 22.10, which I'm aware now uses Wayland by default. I am used to using VNC on X11, so haven't got much experience in the Wayland space or using RDP.
I'm ...
- 541
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26
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Run interactive program from ssh then disconnect and reconnect [duplicate]
From my laptop I'd need to start a ssh terminal to a remote desktop in which I'll run a long running program testdisk or photorec, then once I setup my selections start the data recovery. Then I'd ...
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1k
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How can i solve Access denied in PuTTY?
I am trying to use PuTTY. However when I tried to log in I get an Access denied error. I don't think the password is wrong because I use the same password and IP address with ssh when I connect to the ...
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2
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104
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Reducing latency before retrieving a local terminal when an SSH session has expired
When working on a remote server, I open an SSH connection in a terminal ssh remote_username@remote_host.
For some reason, if I left this connection idle for too long, the terminal becomes ...
- 1,280
1
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1
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495
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SSH attack - multiple root login attempts
Recently I noticed that someone is constantly trying to log in to root via ssh on my Ubuntu server. I noticed this about week ago and it is done from multiple IP addresses. At the very beginning he ...
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1
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11k
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Limit SSH max connections
I have a server ( ubuntu 20.04 ) and need to limit max ssh active sessions (to decrease CPU usage ) ,i have added this
myuser hard maxlogins 1
to /etc/security/limits.conf
but it doesn't work! ...
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1
answer
513
views
How to administrate Server with Apache Guacamole RDG per ssh with TOTP enabled?
I set up an Apache Guacamole server (v1.4.0) on Ubuntu 22.04 LTS. The modules guacamole-auth-jdbc-mysql.jar, guacamole-auth-ldap.jar and guacamole-auth-totp.jar are also installed. The openssh-server, ...
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1
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153
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What does -L mean in ssh on ubuntu?
I get this error when I try to connect to my server in Ubuntu to a port other than port 80 (Apache).
[-i identity_file] [-J [user@]host[:port]] [-L address]
I added port 8972 to the list of Apache ...
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1
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2k
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How to enable a specific port on Ubuntu version 22 so that it is accessible to outside world?
How to enable a specific port on Ubuntu version 22 so that it is accessible to outside world?
I am already logged into the server through ssh using port 22 and able to successfully execute all the ...
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0
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272
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Internet connection broken after installing VPN
I installed https://hide.me VPN on my Ubuntu 22.10 server.
https://github.com/eventure/hide.client.linux
I was using XRDP to control the server with a GUI.
After I enabled the VPN, the XRDP connection ...
- 111
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1
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2k
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Enable ssh login with password for a user
I am the admin of a Ubuntu 20.04 server and I want to enable ssh login for a user through password, rather than using key pairs.
The /etc/ssh/ssh_config file on the host looks like this (<username&...
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3
votes
1
answer
15k
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Authenticator provider $SSH_SK_PROVIDER did not resolve SSH Connection ubuntu server
Hi everyone I'm using an Ubuntu server and I want to allow the access through any network in the world.
I configured the static ip address.
I have mapped the port 22-22 in the router configuration
I'...
- 131
1
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1
answer
141
views
Which binaries should be available for the user to change password via ssh
I have a user that has a rbash as default shell (in order to limit his privileges). I also changed his default bin directory to cut-off most binaries from his PATH. User should time to time change his ...
- 111
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0
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60
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setup SSH access for another user without sending him the private key [Ubuntu 20.04]
I need to abilitate ssh access on a server for another non-root user (I am root). I have created a ssh pair for him on the host, copied the public one in his ~/.ssh directory as .ssh/authorized_keys ...
- 11
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0
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97
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Why I am not able to connect Ubuntu server with SSH key?
I have Ubuntu server 22.4 and I it had SSH server installed. Time to time SSH connection was doping even while I was working. I update the SSH by using command sudo apt-get update ssh. After the ...
- 101
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1
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161
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Access to remote server via SSH via pem key requests 2 set of password (key and user)
On a remote server, I would like to access via ssh only with a pem key, which is password protected, but I'm being asked for the user account password as well
I created the account which I want to use ...
- 166
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1
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8k
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SSH server stopped recieving connections after reboot and kernel upgrade
I am running Ubuntu 22.04.1 LTS on a server, and this morning I ssh'd in to it from the Termius app on my phone to run update and upgrade as per usual, then rebooted it twice to install a kernel ...
0
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0
answers
226
views
can't connect to the Ubuntu server
I am trying to connect to my Ubuntu server using ssh command on Ubuntu 22.04
after about a minute it shows me a timeout error
I tried disabling firewall or this command :
sudo ufw allow ssh
and I'm ...
- 1
0
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0
answers
279
views
Port forwarding in Ubuntu 20.04 causes pings to fail
I'm trying to forward ssh port to connect my servers together. Something like this:
Local Machine === (ssh) ===> Server A === (ssh) ===> Server B
My Servers aren't in a same location. They're ...
2
votes
0
answers
305
views
Auditd TTY Settings for Ubuntu Server 20.04
I am on Ubuntu 20.04 Server. I have auditd installed and configured.
Question
How can enable TTY logging via auditd?
In /etc/auditd/rules.d/audit.rules I have:
-w /etc/securetty -p wa -k login
-w /...
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