Public bug reported:
I'm encountering the same issue as #1451601 describes. The fix, a more
recent libcap2 2.25, has made it into the Yakkety distribution but not
Xenial.
Summary of the problem: One cannot raise or lower CAP_AUDIT_READ, which
is equal to decimal value 37. As compiled, libcap2 2.24 supports up to
CAP_BLOCK_SUSPEND (36).
lsb_release -rd
Description: Ubuntu 16.04.2 LTS
Release: 16.04
apt-cache policy libcap2
libcap2:
Installed: 1:2.24-12
Candidate: 1:2.24-12
Version table:
*** 1:2.24-12 500
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
100 /var/lib/dpkg/status
setcap cap_audit_read=eip /bin/ls
fatal error: Invalid argument
usage: setcap [-q] [-v] (-r|-|<caps>) <filename> [ ... (-r|-|<capsN>)
<filenameN> ]
Note <filename> must be a regular (non-symlink) file.
** Affects: libcap2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1704416
Title:
CAP_AUDIT_READ is not supported on Xenial
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