[SOLVED] Connecting to CentOS 7.9 with SSH error Permission Denied

Issue

i try to connect to my Linux centOS server with Root user on port 22 with this command:

ssh -p 22 root@ip

but connection return this error:

root@ip: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

what should i do?

Solution

First of all you must change permissions on your server machine with this command:

chmod 700 /root/.ssh
chmod 600 /root/.ssh/authorized_keys

then edit in the /etc/ssh/sshd_config to this:

sudo sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd_config;
sudo sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config;

Run:

systemctl stop sshd.service

and Run:

systemctl enable sshd.service

then Run:

systemctl start sshd.service

after that:

systemctl status sshd.service

and check the output. If everything goes well you should have ssh services every time you boot from now on.

Answered By - Sajjad Serajzadeh

Answer Checked By - David Marino (WPSolving Volunteer)