Recently created rpm package from OpenSSH 6.7 tar ball package. After successfully creating rpm and upgrading the OpenSSH server, met with issue – error: Could not get shadow information for root .Given below is some section of the error found in messages log (/var/log/messages)Jan 17 11:21:17 localhost systemd: Started SYSV: OpenSSH server daemon.Jan 17 11:21:26…
FAQ : How to connect to Ubuntu Desktop / Server by using ssh. I just installed Ubuntu 14.04 LTS Desktop edition and have not found ssh service running in system. Answer : OpenSSH is a FREE version of the SSH connectivity tools. It provides the encrypted communication between computers by using ssh protocol. History of…
The tutorial will explain about how to change default ssh port number in OpenSSH Server on CentOS 7 and RHEL 7 . We will change the SSH default port no. 22 to our desired number and we will keep SELINUX enabled. We will also add new firewalld rule with respect to new ssh port number….
SSH, the abbreviation is Secure Shell. It is a software program use the secure shell protocol to accept connection from remote computers.SSH is TCP based protocol. By default the ssh protocol listen at port no. 22 . You can also customize the port number but always remember while changing the ssh port no. it should…
SCP stands for secure copy.It is based upon SSH (Secure Shell) protocol.SCP is used for securely transferring the files between local and remote system. Note: If SSH service is not running or deny by firewall or IPTABLES of system then SCP will also not work. Syntax: scp SOURCE-FILE-LOCATION TARGET-LOCATION (1) SCP file from local to…
How to run command in remote linux / unix system by using ssh If you are working as a linux system admin, it is important to know how you can execute the command in remote linux or unix based operating system by using ssh.The method is very useful and you can also use it in…
how to deny root ssh access in linux server For security point of view we generally restrict root direct ssh access in server.But keep in mind you also must have user who can access the server other than root. So before doing this practical ,check if you have access to server with other user or…
Change the default port number of ssh server SSH Default Port no. = 22 To change the default port number of ssh server hardly takes a few steps but with the point of security it is important to change the default port no. 22 After this you can also use the anti port scan script…
When you try to ssh the another remote Linux/Unix machine , you might have encountered with the WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! . This message we have often seen when we work in Linux machines. In this post we have provided the Reason and Solution on this Warning. root@tuxworld:/tmp# ssh 10.10.0.16 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING:…
Long time ago one of my U.S system admin was very security conscious. He asked me to create id_rsa.pub key in server. I created the key with ssh-keygen -t rsa command. And send it him through encrypted email. Next day he wrote me ,what is the ssh key fingerprint ? First let’s have some introduction….
In new server today created a authorized_keys file in /root/.ssh/ directory. After doing ssh first time got the error – Agent admitted failure to sign using the key For solving this issue use the command ssh-add in client machine ssh-add Given below are the outputs from terminal. The solution pretty much straight simple. sharad@mypc:~$ ssh…
After doing minimal installation of CentOS 6.3 server ,we were not able to do scp from my client machine to CentOS server.It was simply showing the error – “scp command not found”. This thing has happened earlier when we have used the CentOS 6. When it was occur last time with us in CentOS 6.0…
Non interactive ,without typing password do ssh to Server : By sshpass Most of the time I found that there is always a question How to do ssh to Server without typing the passwd. I have one posted on bash scripting method with using expect command and there is one more method of passing RSA-DSA…
In this post, we will learn how to configure the SSH RSA Key authentication in Linux servers. We will also setup the password less login between the servers.
In this post, we will know how to do non-interactive apt install in Debian Operating System.
By this method you can skip the interactive query ask while doing apt or apt-get install command.