Xdebug remotely thru SSH  with Visual Studio Code

SSH passwordless login setup

First log in on A as user a and generate a pair of authentication keys. Do not enter a passphrase:

a@A:~> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/a/.ssh/id_rsa): 
Created directory '/home/a/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/a/.ssh/id_rsa.
Your public key has been saved in /home/a/.ssh/id_rsa.pub.
The key fingerprint is:
3e:4f:05:79:3a:9f:96:7c:3b:ad:e9:58:37:bc:37:e4 a@A

Now use ssh to create a directory ~/.ssh as user b on B. (The directory may already exist, which is fine):

a@A:~> ssh b@B mkdir -p .ssh
b@B's password:

Finally append a’s new public key to b@B:.ssh/authorized_keys and enter b’s password one last time:

a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:

From now on you can log into B as b from A as a without password:

a@A:~> ssh b@B

A note from one of our readers: Depending on your version of SSH you might also have to do the following changes:

  • Put the public key in .ssh/authorized_keys2
  • Change the permissions of .ssh to 700
  • Change the permissions of .ssh/authorized_keys2 to 640


SSH Tunel on Linux

shell script

if [ -z "$1" ]; then
# Variable is empty
echo "Parameter is missing!! 1 = host1.remoteserver.com 2 = host2..."

ssh root@host$1.remoteserver.com -R9002:



xdebug.remote_enable = 0
xdebug.remote_autostart = 1
xdebug.remote_host =
xdebug.remote_log = /projects/_logs/xdebug.log
error_reporting =E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
error_log = /projects/_logs/php5-errors.log


Turn on/off debugger here by virtual hosts

php_flag display_startup_errors on
php_flag display_errors on
php_flag html_errors on
php_flag xdebug.remote_enable on


in launch.json


"name": "remoteserver.com",
"type": "php",
"request": "launch",
"port": 9002,
"pathMappings": {  "/var/www/vhosts/remoteserver.com/httpdocs/": "${workspaceRoot}" }