anchore was installed in centos system, it reported dpkg commands requirement while running analysis.
output message:
ERROR Anchore requires dpkg libs and commands: [Errno 2] No such file or directory
ERROR Error running pre-flight checks

use option --debug
2019-11-16 12:27:10,002 ERROR common.py anchore_print_err Anchore requires dpkg libs and commands
Traceback (most recent call last):
File "/home/anchore/lib/python2.7/site-packages/anchore/cli/init.py", line 213, in anchore_pre_flight_check
sout = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
File "/usr/lib64/python2.7/subprocess.py", line 568, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File "/usr/lib64/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
2019-11-16 12:27:10,003 ERROR common.py anchore_print_err Error running pre-flight checks