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--- fuss:debian [2020/02/28 05:41] – [Execute Java Program under Different JDK Version] office
+++ fuss:debian [2021/12/30 13:19] – [Disable nftables and Continue Using Legacy iptables] office
@@ Line 396: / Line 396: @@
 where:
   * ''-custom'' is a build name appended to the kernel package that will be built.
+====== Persisting Network Hardware Settings ======
+When installing ''ethtool'' on Debian, a script is placed at ''/etc/network/if-up.d/ethtool'' that, once an interface is brought up, runs through all the settings for all interfaces and makes changes to the hardware driver via ''ethtool''.
+The proper way to persist settings in Debian, for instance, to enable checksum offloading, is to make the settings in the interfaces file but without using an ''up'' or ''post-up'' script.
+For instance, the following settings will bring up the interface ''eth0'' via DHCP and then enable TSO on the interface:
+<code>
+auto eth0
+iface eth0 inet dhcp
+    offload-tx on
+    offload-sg on
+    offload-tso on
+</code>
+====== Disable nftables and Continue Using Legacy iptables ======
+<code bash>
+update-alternatives --set iptables /usr/sbin/iptables-legacy
+update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
+update-alternatives --set arptables /usr/sbin/arptables-legacy
+update-alternatives --set ebtables /usr/sbin/ebtables-legacy
+</code>
+====== Fix Issues on Release Change ======
+When a repository changes its release data the following error should appear when updating packages:
+<code>
+This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details
+</code>
+the solution is to run ''apt'' as:
+<code bash>
+apt-get update --allow-releaseinfo-change
+</code>
+with the extra ''--allow-releaseinfo-change''.