/usr/share/sbnc/scripts/iface.tcl is in sbnc-tcl 1.3.9-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | # Iface version 1 is obsolete, so we're loading version 2 instead.
# Keep in mind that the web interface for iface version 1
# will NOT work with iface2. You WILL have to use the web interface
# for iface2 instead.
source "/usr/share/sbnc/scripts/itype.tcl"
source "/usr/share/sbnc/scripts/iface2.tcl"
source "/usr/share/sbnc/scripts/ifacecmds.tcl"
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