/usr/share/munin/plugins/entropy is in munin-node 1.4.6-3ubuntu3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | #!/bin/sh
# -*- sh -*-
: << =cut
=head1 NAME
entropy - Plugin to monitor available entropy
=head1 CONFIGURATION
No configuration
=head1 AUTHOR
Unknown author
=head1 LICENSE
Unknown license
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
. $MUNIN_LIBDIR/plugins/plugin.sh
if [ "$1" = "autoconf" ]; then
if [ -r /proc/sys/kernel/random/entropy_avail ]; then
echo yes
exit 0
else
echo no
exit 0
fi
fi
if [ "$1" = "config" ]; then
echo 'graph_title Available entropy'
echo 'graph_args --base 1000 -l 0'
echo 'graph_vlabel entropy (bytes)'
echo 'graph_scale no'
echo 'graph_category system'
echo 'graph_info This graph shows the amount of entropy available in the system.'
echo 'entropy.label entropy'
echo 'entropy.info The number of random bytes available. This is typically used by cryptographic applications.'
print_warning entropy
print_critical entropy
exit 0
fi
echo -n "entropy.value "
cat /proc/sys/kernel/random/entropy_avail
|