Simplify SSH template: use Ubuntu 25.04 with built-in SSH support

Author: beran-t

docs/sandbox/ssh-access.mdx

@@ -80,18 +80,12 @@ You can either build a [custom template](/docs/template/examples/ssh-ready) or s
 
 ```bash
 # Install SSH server and websocat
-sudo apt-get update && sudo apt-get install -y openssh-server curl
+sudo apt-get update && sudo apt-get install -y openssh-server
 sudo curl -fsSL -o /usr/local/bin/websocat https://github.com/vi/websocat/releases/latest/download/websocat.x86_64-unknown-linux-musl
 sudo chmod a+x /usr/local/bin/websocat
 
-# Set a password for the user
-echo "user:sandbox" | sudo chpasswd
-
-# Generate host keys, start SSH daemon and WebSocket proxy
-sudo mkdir -p /run/sshd
-sudo ssh-keygen -A
-sudo /usr/sbin/sshd
-websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22
+# Start WebSocket proxy
+sudo websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22
 ```
 
 ## Connect via SSH

docs/template/examples/ssh-ready.mdx

@@ -12,19 +12,16 @@ First, define the template. We install OpenSSH server and [websocat](https://git
 import { Template, waitForPort } from 'e2b'
 
 export const template = Template()
-  .fromUbuntuImage('22.04')
-  // Install SSH server, curl for downloading websocat, and sudo for start command
-  .aptInstall(['openssh-server', 'curl', 'sudo'])
-  // Configure SSH and download websocat (requires root)
+  .fromUbuntuImage('25.04')
+  // Install SSH server
+  .aptInstall(['openssh-server'])
+  // Download websocat (requires root)
   .runCmd([
     'curl -fsSL -o /usr/local/bin/websocat https://github.com/vi/websocat/releases/latest/download/websocat.x86_64-unknown-linux-musl',
     'chmod a+x /usr/local/bin/websocat',
-    "sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config",
-    'echo "user:sandbox" | chpasswd',
-    'echo "user ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers',
   ], { user: 'root' })
-  // Start SSH daemon and WebSocket proxy on port 8081
-  .setStartCmd('sudo mkdir -p /run/sshd && sudo ssh-keygen -A && sudo /usr/sbin/sshd && websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22', waitForPort(8081))
+  // Start WebSocket proxy on port 8081
+  .setStartCmd('sudo websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22', waitForPort(8081))
 ```
 
 ```python Python
@@ -33,19 +30,16 @@ from e2b import Template, wait_for_port
 
 template = (
     Template()
-    .from_ubuntu_image("22.04")
-    # Install SSH server, curl for downloading websocat, and sudo for start command
-    .apt_install(["openssh-server", "curl", "sudo"])
-    # Configure SSH and download websocat (requires root)
+    .from_ubuntu_image("25.04")
+    # Install SSH server
+    .apt_install(["openssh-server"])
+    # Download websocat (requires root)
     .run_cmd([
         "curl -fsSL -o /usr/local/bin/websocat https://github.com/vi/websocat/releases/latest/download/websocat.x86_64-unknown-linux-musl",
         "chmod a+x /usr/local/bin/websocat",
-        "sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config",
-        'echo "user:sandbox" | chpasswd',
-        'echo "user ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers',
     ], user="root")
-    # Start SSH daemon and WebSocket proxy on port 8081
-    .set_start_cmd("sudo mkdir -p /run/sshd && sudo ssh-keygen -A && sudo /usr/sbin/sshd && websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22", wait_for_port(8081))
+    # Start WebSocket proxy on port 8081
+    .set_start_cmd("sudo websocat -b --exit-on-eof ws-l:0.0.0.0:8081 tcp:127.0.0.1:22", wait_for_port(8081))
 )
 ```