/usr/share/doc/vowpal-wabbit-doc/examples/test/train-sets/ref/rcv1_cb_eval.stderr is in vowpal-wabbit-doc 8.1.1-1.
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 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | Num weight bits = 18
learning rate = 0.5
initial_t = 0
power_t = 0.5
using no cache
Reading datafile = train-sets/rcv1_cb_eval
num sources = 1
average since example example current current current
loss last counter weight label predict features
0.000000 0.000000 1 1.0 known 2 50
0.000000 0.000000 2 2.0 known 2 103
0.000000 0.000000 4 4.0 known 2 134
0.000000 0.000000 8 8.0 known 2 145
0.476507 0.953014 16 16.0 known 2 23
0.500997 0.525487 32 32.0 known 2 31
0.581606 0.662214 64 64.0 known 2 60
0.484693 0.387780 128 128.0 known 2 105
0.481404 0.478114 256 256.0 known 2 122
0.520069 0.558734 512 512.0 known 2 74
finished run
number of examples per pass = 1000
passes used = 1
weighted example sum = 1000.000000
weighted label sum = 0.000000
average loss = 0.507619
total feature number = 76670
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