System/package information

12:59:14 root ~/nfsen-1.3.8% cat /etc/os-release
NAME="Ubuntu"
VERSION="17.04 (Zesty Zapus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 17.04"
VERSION_ID="17.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=zesty
UBUNTU_CODENAME=zesty


13:01:39 root ~/nfsen-1.3.8% apt-cache policy nfdump
nfdump:
  Installed: 1.6.15-3
  Candidate: 1.6.15-3
  Version table:
 *** 1.6.15-3 500
        500 http://us.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages
        100 /var/lib/dpkg/status

13:01:59 root ~/nfsen-1.3.8% which nfdump
/usr/bin/nfdump

% dpkg -l | grep perl | grep -i mail
ii  libemail-valid-perl                         1.202-1                                            all          Perl module for checking the validity of Internet email addresses
ii  libmailtools-perl                           2.18-1                                             all          Manipulate email in perl programs

13:06:07 root ~/nfsen-1.3.8% apt-cache policy php
php:
  Installed: 1:7.0+49
  Candidate: 1:7.0+49
  Version table:
 *** 1:7.0+49 500
        500 http://us.archive.ubuntu.com/ubuntu zesty/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu zesty/main i386 Packages
        100 /var/lib/dpkg/status

13:06:49 root ~/nfsen-1.3.8% dpkg -l | grep rrd
ii  librrd8:amd64                               1.6.0-1build1                                      amd64        time-series data storage and display system (runtime library)
ii  librrds-perl:amd64                          1.6.0-1build1                                      amd64        time-series data storage and display system (Perl interface, shared)
ii  rrdtool                                     1.6.0-1build1                                      amd64        time-series data storage and display system (programs)