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Update TCP keepalive commands for Linux #2286

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Update TCP keepalive commands for Linux #2286

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6 changes: 0 additions & 6 deletions source/faq/diagnostics.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -55,12 +55,6 @@ their own sockets.

.. include:: /includes/fact-tcp-keepalive-linux.rst
.. include:: /includes/fact-tcp-keepalive-osx.rst

The above methods of setting the TCP keepalive are not persistent; you
will need to reset the new ``tcp_keepalive_time`` value each time you
reboot or restart a system. see your operating system's documentation
for instructions on setting the TCP keepalive value persistently.

.. include:: /includes/fact-tcp-keepalive-windows.rst

.. versionchanged:: 2.0
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21 changes: 20 additions & 1 deletion source/includes/fact-tcp-keepalive-linux.rst
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@@ -1,6 +1,12 @@
On Linux systems you can use the following operation to check the
value of ``tcp_keepalive_time``:

.. code-block:: sh

sysctl net.ipv4.tcp_keepalive_time

Or the following:

.. code-block:: sh

cat /proc/sys/net/ipv4/tcp_keepalive_time
Expand All @@ -10,5 +16,18 @@ The value is measured in seconds. You can change the

.. code-block:: sh

echo <value> > /proc/sys/net/ipv4/tcp_keepalive_time
sudo sysctl -w net.ipv4.tcp_keepalive_time=<value>

Or the following:

.. code-block:: sh

echo <value> | sudo tee /proc/sys/net/ipv4/tcp_keepalive_time

This does not persist across system reboots. To do so, add the
following line to ``/etc/sysctl.conf``:

.. code-block:: sh

net.ipv4.tcp_keepalive_time = <value>

5 changes: 5 additions & 0 deletions source/includes/fact-tcp-keepalive-osx.rst
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Expand Up @@ -11,3 +11,8 @@ To set a shorter keep alive period use the following invocation:

sysctl -w net.inet.tcp.keepinit=<value>

The change is not persistent; you will need to reset the new
``tcp_keepalive_time`` value each time you reboot or restart a
system. See your operating system's documentation for instructions
on setting it persistently.