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If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script && exec $SHELL"
   

   Some important notes:

   • The exec $SHELL is included to ensure that the user still gets their shell session after the script execution.
   • You can change && to & if your script is time-consuming. Using && will block the user from interacting until the script is complete. However if you are having trouble with scp after this change, reviewing this choice might help.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ $SSH_ORIGINAL_COMMAND ]]; then
    exec /bin/bash -c "$SSH_ORIGINAL_COMMAND"
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

Don't forget to restart your sshd service with either $ sudo systemctl restart sshd.service or $ sudo service ssh restart depending on your system.

If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script"
   

   Some important notes:

   • This will override the process of ssh running the user their shell, so that will have to be added to the script as done below.
   • You can make this user specific by putting the username in place of the star.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ $SSH_ORIGINAL_COMMAND ]]; then
    eval "$SSH_ORIGINAL_COMMAND"
else
    # !!NB!!
    # if the user has not specified a ssh command run their shell
    exec $SHELL
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

Don't forget to restart your sshd service with either $ sudo systemctl restart sshd.service or $ sudo service ssh restart depending on your system.

If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script && exec $SHELL"
   

   Some important notes:

   • The exec $SHELL is included to ensure that the user still gets their shell session after the script execution.
   • You can change && to & if your script is time-consuming. Using && will block the user from interacting until the script is complete.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ -n $SSH_ORIGINAL_COMMAND ]]; then
    exec /bin/bash -c "$SSH_ORIGINAL_COMMAND"
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

Don't forget to restart your sshd service with either $ sudo systemctl restart sshd.service or $ sudo service ssh restart depending on your system.

If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script && exec $SHELL"
   

   Some important notes:

   • The exec $SHELL is included to ensure that the user still gets their shell session after the script execution.
   • You can change && to & if your script is time-consuming. Using && will block the user from interacting until the script is complete. However if you are having trouble with scp after this change, reviewing this choice might help.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ $SSH_ORIGINAL_COMMAND ]]; then
    exec /bin/bash -c "$SSH_ORIGINAL_COMMAND"
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

Don't forget to restart your sshd service with either $ sudo systemctl restart sshd.service or $ sudo service ssh restart depending on your system.

If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script && exec $SHELL"
   

   Some important notes:

   • The exec $SHELL is included to ensure that the user still gets their shell session after the script execution.
   • You can change && to & if your script is time-consuming. Using && will block the user from interacting until the script is complete.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ -n $SSH_ORIGINAL_COMMAND ]]; then
    exec /bin/bash -c "$SSH_ORIGINAL_COMMAND"
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

If you want to run a script after any user logs into your server, you can achieve this by using the ForceCommand directive in the sshd_config file. The ForceCommand will run before any user-supplied commands and before they are given access to a shell.

Follow these steps to set it up:

1. Edit the /etc/ssh/sshd_config file using your preferred text editor. You may need superuser privileges to do this:

   $ sudo nano /etc/ssh/sshd_config
   

2. Add the following lines to the sshd_config file:

   Match User *
       ForceCommand /bin/bash -c "/path/to/script && exec $SHELL"
   

   Some important notes:

   • The exec $SHELL is included to ensure that the user still gets their shell session after the script execution.
   • You can change && to & if your script is time-consuming. Using && will block the user from interacting until the script is complete.

Here's an example of what your script could look like:

#!/bin/bash

# Create a welcome file for the user
touch ~$USER/welcome

# Check if the user is sending a specific command via SSH
if [[ -n $SSH_ORIGINAL_COMMAND ]]; then
    exec /bin/bash -c "$SSH_ORIGINAL_COMMAND"
fi

The script first creates a welcome file in the user's home directory. Then, it checks if the user is sending a specific command via SSH and, if so, executes that command after the script has completed.

Don't forget to restart your sshd service with either $ sudo systemctl restart sshd.service or $ sudo service ssh restart depending on your system.