CentOS

yum clean all
yum update samba

1. [global] workgroup = WORKGROUP security = user netbios name = samba #max protocol = SMB3 2. Temporaly disable SELinux and restart Samba: As root in terminal: #Show status SELinux getenforce #Temporaly disable SELinux (enable SELinux back: setenforce 1) setenforce 0 #restart Samba systemctl restar...

It was my pleasure to do that.

I use a package yum-priorities to solve dependencies. Example: # CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS upd...

You can make KVM virtual OS and get root password for this virtual OS.

I have CentOS 7 with Samba 4 and "security = user". I have linux users from sambauser01 to sambauser099. In smb.conf I have: username map = /etc/samba/usernamemap My file usernamemap: # group static sambauser01 = john sambauser02 = george sambauser03 = Rosanna # group thermal #.......... #.............

Try disable SELinux for test:
Open the /etc/selinux/config file and set the SELINUX mod to permissive (SELINUX=permissive).
Reboot.

I don't have an answer to this question, but you can try adminer:
https://www.adminer.org/en/

acpid on guest installed?

I configured L2TP/IPSec connection by NetworkManager GUI.