ifupがすべてのif-pre-up.dスクリプトを実行していないのはなぜですか？

$ ll /etc/network/if-pre-up.d/

total 20
drwxr-xr-x 2 root root 4096 Jan 15 16:43 ./
drwxr-xr-x 7 root root 4096 Jan 14 21:29 ../
-rwxr-xr-x 1 root root  344 Apr 28  2012 ethtool*
-rwxr-xr-x 1 root root  158 Jan 14 22:01 iptablesload.sh*
-rwxr-xr-x 1 root root 3839 May  3  2012 wireless-tools*
lrwxrwxrwx 1 root root   32 Dec  4 13:00 wpasupplicant -> ../../wpa_supplicant/ifupdown.sh*

$ sudo ifup --all -v

run-parts --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/ethtool
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
run-parts: executing /etc/network/if-pre-up.d/wpasupplicant
run-parts --verbose /etc/network/if-up.d
run-parts: executing /etc/network/if-up.d/000resolvconf
run-parts: executing /etc/network/if-up.d/avahi-autoipd
run-parts: executing /etc/network/if-up.d/avahi-daemon
run-parts: executing /etc/network/if-up.d/ethtool
run-parts: executing /etc/network/if-up.d/ntpdate
run-parts: executing /etc/network/if-up.d/openssh-server
run-parts: executing /etc/network/if-up.d/upstart
run-parts: executing /etc/network/if-up.d/wpasupplicant

iptablesload.shが実行されないのはなぜですか？事前スクリプトのリストが設定されている他の場所はありますか？

これと同じ問題がありました。私が言えることから、末尾の「.sh」を削除すると、期待どおりに動作するはずです。

sudo mv /etc/network/if-pre-up.d/iptablesload{.sh,}