SELinux block timedatectl changes

Just found out this morning that if SELinux is in enforcing mode, it may block the timedatectl command to run in RHEL7. Once changing SELinux to permissive, the problem is gone. Here is the error that I got when executing 'timedatectl set-timezone Australia/Sydney' in a bash script: Failed to issue method call: Did not receive … Continue reading SELinux block timedatectl changes


SSSD can not find some users in AD

We use SSSD to integrate RHEL7 into our Active Directory infrastructure for authentication. All users in the sys admins group can login with their AD credentials except one. It took me a few weeks to troubleshoot. On hand, I checked the sssd log and I can see the Linux server can find the user in … Continue reading SSSD can not find some users in AD

Check osad service status in Satellite

RedHat Satellite server allows user to push the updates or run the command remotely in a 'real time' manner. The backend services for this feature are osa-dispatcher, jabberd and osad. osa-dispatcher periodically check the database to see if any clients have actions they need to perform. If there are, it sends the messages through jabberd … Continue reading Check osad service status in Satellite

Spacewalk Installation Step by Step

To evaluate Spacewalk, I have installed it in my lab. Spacewalk Server: RHEL01 (RHEL5.5/ 1vCPU/ 2G vRAM/ 20G vHDD) Spacewalk Client:  RHEL02 (RHEL5.5/ 1vCPU/ 1G vRAM/ 8G vHDD) Install Spacewalk Server 1) Install the Spacewalk Server yum repo rpm -Uvh 2) Install EPEL yum repo rpm -Uvh 3) Install Spacewalk server and its dependencies yum … Continue reading Spacewalk Installation Step by Step