Category Archives: Linux

Engine-setup hangs on “Creating CA” During Installation

Assalamualaikum, Issue: ovirt-engine hang during installation. Stuck at Creating CA. Please confirm installation settings (OK, Cancel) [OK]: [ INFO ] Stage: Transaction setup [ INFO ] Stopping engine service [ INFO ] Stopping ovirt-fence-kdump-listener service [ INFO ] Stopping dwh … Continue reading

Posted in Linux, oVirt, RHEV | Tagged , ,

Connect to RHEV/oVIrt Using CLI

Assalamualaikum, To connect to your RHEV/oVirt using CLI (rhevm-shell/ovirt-shell) # ovirt-shell -l -u admin@internal –ca-file /etc/pki/ovirt-engine/ca.pem Below is the location of the related certs. To connect ‘securely’ to the rhevm-shell, the following files are required to be passed: [key-file] … Continue reading

Posted in Linux, oVirt, RHEV, RHV | Tagged , ,

How to Add One User to Multiple Groups

Assalamualaikum, The utility is usermod and is used like: usermod -a -G group1,group2 username Where username is the user you want to modify and group1 and group2 are the new groups you want that user to join. Running the command … Continue reading

Posted in Linux, UNIX | Tagged , , , , , , ,

How to Install Spacewalk 2.8 in CentOS7/RHEL7

Assalamualaikum.. This is the simplest way on how to install Spacewalk in CentOS 7 or RHEL 7. For details and complete explanation please go to official page HowToInstall Spacewalk. Pre-Requisites Outbound open ports 80, 443 Inbound open ports 80, 443, … Continue reading

Posted in Linux, RedHat | Tagged

Changing the Hostname of an oVirt Manager/Engine

Assalamualaikum, Prepare relevant DNS and/or /etc/hosts records for the new name. If using DHCP, update the DHCP server’s configuration. Change the hostname. This is usually done by editing /etc/hostname and rebooting. There are other options and details which are not … Continue reading

Posted in Linux, oVirt, RHEV

How to Check RAM/Memory by Percentage

Assalamualaikum, Using the the free command: This will report the percentage of memory in use % free | grep Mem | awk ‘{print $3/$2 * 100.0}’ 23.8171 This will report the percentage of memory that’s free % free | grep … Continue reading

Posted in Linux | Tagged , , , ,

RHEV/oVirt Environment is Non Responsive with Errors as: Received fatal alert: certificate_expired

Assalamualaikum. Issue 1. Certificates have expired and all hosts are non responsive 2. Getting error as below in the engine logs: ERROR [org.ovirt.engine.core.vdsbroker.irsbroker.UploadStreamVDSCommand] (DefaultQuartzScheduler_Worker-64) [6d32f092] Command ‘UploadStreamVDSCommand(HostName = xyz, UploadStreamVDSCommandParameters:{runAsync=’true’, hostId=’12345dbe-1db1-11e1-ade1-00215e97f418′})’ execution failed: Received fatal alert: certificate_expired ERROR [org.ovirt.engine.core.bll.UploadStreamCommand] … Continue reading

Posted in Linux, oVirt, RedHat, RHEV, RHV, Virtualization | Tagged , , , ,

How to Identify the File System Type in Linux/Solaris

Salam.. There are few methods how to determine your linux file system. Below are commands that I usually use. Linux $ df -Th $ df -Th | grep “^/dev” $ fsck -N /dev/sd* $ lsblk -f $ mount | grep … Continue reading

Posted in freeBSD, Linux, Solaris, UNIX | Tagged ,

Happy New Year 2018!

.. Last login: Tue Jan 2 12:11:49 2018 from [hanief@master ~]$ mv 2017 /archive [hanief@master ~]$ sudo mkdir 2018 [hanief@master ~]$ cd 2018 [hanief@master ~]$ vi [hanief@master ~]$ chmod +x [hanief@master ~]$ nohup ./ & [hanief@master ~]$ … Continue reading

Posted in Linux, UNIX | Tagged ,

CentOS-7 “Minimal Desktop” installation (GNOME)

Assalamualaikum.. For some reasons you need to install GUI on your CentOS server. In my case, I having a bad time to install Oracle Database 12c in my CentOS using CLI. I don’t have plenty of times struggling with CLI … Continue reading

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