Linux: Difference between revisions

Revision as of 01:54, 14 September 2019

The notes here are mainly for Ubuntu/Debian.

SSH

SSH Keys

Generate an ssh-key for every client

ssh-keygen -t ed25519 -a 100 [-C "comment your client name"] [-f output_path]

Some older software such as Solid file explorer require RSA keys in PEM key format

ssh-keygen -t rsa -b 4096 -a 100 -m PEM [-C "comment your client name"] [-f output_path]

You can also convert existing keys to PEM format

ssh-keygen -p -m PEM [-C "comment your client name"] [-f output_path]

Manage ssh keys

# On the client
ssh-copy-id [email protected]

# On the server
vim ~/.ssh/authorized_keys

Notes:

According to this you should avoid using ECDSA and DSA keys.

Switching between Nvidia and Intel

Reference Make sure the Nvidia graphics drivers are installed. Then you can select between Nvidia and Intel GPUs using the Nvidia X Server Settings application nvidia-settings. Alternatively, you can use the following commands in the terminal.
To switch to the Nvidia GPU:

sudo prime-select nvidia

To switch back to the Intel GPU:

sudo prime-select intel

prime-select query will print either nvidia or intel to stdout.

@@ Line 7: / Line 7: @@
 <syntaxhighlight lang="bash">
 ssh-keygen -t ed25519 -a 100 [-C "comment your client name"] [-f output_path]
+</syntaxhighlight>
+Some older software such as Solid file explorer require RSA keys in PEM key format
+<syntaxhighlight lang="bash">
+ssh-keygen -t rsa -b 4096 -a 100 -m PEM [-C "comment your client name"] [-f output_path]
+</syntaxhighlight>
+You can also convert existing keys to PEM format
+<syntaxhighlight lang="bash">
+ssh-keygen -p -m PEM [-C "comment your client name"] [-f output_path]
 </syntaxhighlight>
 Manage ssh keys
@@ Line 18: / Line 26: @@
 </syntaxhighlight>
+Notes:<br>
+* According to [https://security.stackexchange.com/questions/143442/what-are-ssh-keygen-best-practices this] you should avoid using ECDSA and DSA keys.
 ===Switching between Nvidia and Intel===