added useful linux commands page

source/docs/troubleshooting/index.rst

@@ -8,3 +8,4 @@ Troubleshooting
    logging
    camera-troubleshooting
    networking-troubleshooting
+   unix-commands

source/docs/troubleshooting/unix-commands.rst

@@ -0,0 +1,49 @@
+Useful Unix Commands
+====================
+
+SSH
+---
+
+`SSH (Secure Shell) <https://www.mankier.com/1/ssh>`_ is used to securely connect from a local to a remote system (ex. from a laptop to a coprocessor).
+
+.. note:: Unlike the other commands on this page, ssh is not Unix specific and can be done on Windows and MacOS from their respective terminals.
+
+Example:
+
+.. code-block:: bash
+
+    ssh username@hostname
+
+ifconfig
+--------
+
+Run `ifconfig <https://www.mankier.com/8/ifconfig>`_ with your coprocessor connected to a monitor in order to see its IP address and other network configuration information.
+
+
+SCP
+---
+
+`SCP (Secure Copy) <https://www.mankier.com/1/scp>`_ is used to securely transfer files between local and remote systems.
+
+Example:
+
+.. code-block:: bash
+
+    scp [file] username@hostname:/path/to/destination
+
+v4l2-ctl
+--------
+
+`v4l2-ctl <https://www.mankier.com/1/v4l2-ctl>`_ is a command-line tool for controlling video devices.
+
+List available video devices (used to verify the device recognized a connected camera):
+
+.. code-block:: bash
+
+    v4l2-ctl --list-devices
+
+List supported formats and resolutions for a specific video device:
+
+.. code-block:: bash
+
+    v4l2-ctl --list-formats-ext --device /path/to/video_device