Ubuntu the system is running in low-graphics mode
I am caused by modifying permissions. Possible solutions:
Plan 1:
sudo apt-get install fglrx
sudo reboot
Scheme 2:
sudo apt-get update
sudo apt-get purge flglrx
sudo reboot
2. This error is reported when the host is remotely logged in to using SSH without encryption
The authenticity of host ‘192.168.121.180 (192.168.121.180)’ can’t be established. ECDSA key fingerprint is SHA256:V72BMtFPFfXTpnctqsq9fuyuZqZprtaYzXFBkGhYcSQ. Are you sure you want to continue connecting (yes/no)? yes Failed to add the host to the list of known hosts (/home/python/.ssh/known_hosts).
SSH: sudo ~/. SSH: sudo ~/. SSH: sudo ~/. SSH: sudo ~/.
Solution 1: You can modify the ownership of the. SSH file
! It is not recommended to use this method because it can cause some problems, as there are also a lot of detours.
Method 2:
As a common user, use sudo permission to modify the configuration file /etc/ssh/sshd_config
$ sudo vim /etc/ssh/sshd_config …
RSAAuthentication Yes # Enable RSA authentication
PubkeyAuthentication Yes # Enable public key and private key pairing authentication
AuthorizedKeysFile %h/.ssh/authorized_keys #…
Restarting the SSH service (Different versions have different restart methods) :
$ sudo service ssh restart
Create private and public keys
When creating a key pair, do not add sudo before a command
When creating a key pair, do not add sudo before a command
When creating a key pair, do not add sudo before a command
-t specifies the type, -f specifies the file generation path, and -p specifies the file password (” indicates no password).
$ ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ”
Generating public/private rsa key pair.
Your identification has been saved in /home/user/.ssh/id_rsa.
Your public key has been saved in /home/user/.ssh/id_rsa.pub.
he key fingerprint is:
SHA256: sRWB6v9sTYvBAJVc40QFZs49JQuQVkPjB6fRc7xETDM [email protected]
The key’s randomart image is:
+—[RSA 2048]—-+ | ooX^=+=E | | . *O %o+=o | | +. B =+ . | | . .+ . .. | | . So | | . o . | | . = . | | .. o o | | oo | +—-[SHA256]—–+
A pair of keys is generated
Public key: id_rsa. Pub
Keys: id_rsa
Copy the generated public key (ID_ras.pub) to another server
SSH – copy – id – I ~ /. SSH/id_rsa pub [email protected]