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Description of problem:
install empty /etc/sysconfig/authconfig file

authconfig --restorebackup will not delete the previously non-existent backup file and this will lead to wrong setup in /etc/nsswitch.conf

Version-Release number of selected component (if applicable):
authconfig-6.2.8-8.el7

How reproducible:

Steps to Reproduce:
11.authconfig --savebackup backup
2.authconfig --enableldap --enableforcelegacy --enablemkhomedir --disablecache --enableldapauth --update --ldapbasedn dc=my-domain,dc=com --ldapserver ldap://my-domain.com
3.authconfig --restorebackup backup
4.authconfig --enableldap --enableforcelegacy --enablemkhomedir --disablecache --enableldapauth --ldapbasedn dc=my-domain,dc=com --enableldaptls --ldapserver ldap://my-domain.com --update

Actual results:
cat /etc/nsswitch.conf | grep '^passwd'
passwd:     files


Expected results:
cat /etc/nsswitch.conf | grep '^passwd'
passwd:     files ldap

Additional info:

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2403.html