[ssh]: update

ssh/README.md

@@ -16,7 +16,7 @@ $ chmod 600 ~/.ssh/id_ed25519
 
 To connect to a server, run:
 
-```
+```console
 $ ssh -p port user@server-address
 ```
 
@@ -25,15 +25,17 @@ $ ssh -p port user@server-address
 #### Copy SSH key
 
 1. `sudo apt-get install xclip` or `sudo pacman -S xclip`
-2. `xclip -sel clip < ~/.ssh/id_rsa.pub`
+2. `xclip -sel clip < ~/.ssh/id_ed25519.pub`
 
 #### Configuration
 
 The client can be configured to store common options and hosts. All options can be declared globally or restricted to specific hosts. For example:
 
+```console
+$ nano -w ~/.ssh/config
+```
+
 ```bash
-nano -w ~/.ssh/config
--------------------------------
 # host-specific options
 Host myserver
     HostName ssh.heckyel.ga
@@ -61,15 +63,21 @@ The SSH daemon configuration file can be found and edited in /etc/ssh/sshd_confi
 
 To allow access only for some users add this line:
 
+```bash
 AllowUsers    user1 user2
+```
 
 To allow access only for some groups:
 
+```bash
 AllowGroups   group1 group2
+```
 
 To add a nice welcome message (e.g. from the /etc/issue file), configure the Banner option:
 
+```bash
 Banner /etc/issue
+```
 
 #### Securing the authorized_keys file