Red Hat Linux – KEWRUNNER

LINUX/Red Hat Linux/Veritas extend/filesystem/grow/resize/vcs/veritas cluster/veritas volume manager/vx April 22, 2021April 22, 2021 by Kew Runner

Veritas Volume Manager: Growing a disk group and expand the filesystem

Validated by Mr Man! Lets start off on node2 [root@node02 ~]# vxdisk list DEVICE TYPE DISK GROUP STATUS sda auto:none - - online invalid sdb auto:cdsdisk disk1 data1dg online clone_disk sdc auto:cdsdisk disk2 data1dg online clone_disk sdd auto:cdsdisk disk3 data1dg…

LINUX/Red Hat Linux/Veritas/Virt&Cont adding disk/hastatus/vcs/veritas cluster server August 15, 2020April 22, 2021 by Kew Runner

Veritas Cluster Server: Adding Disk

Here is the guided tour for adding a new filesystem onto VCS. Make sure the disk is already provisioned and then proceed with updating vfstab||fstab in order to mount the con-cluster filesystem. The application filesystem will be managed by the…

LINUX/Red Hat Linux/TechLab katello-service/satellite 6.6/stopping service August 4, 2020August 4, 2020 by Kew Runner

Satellite Server: katello-service

Time for some upgrades and backups of the satellite server, first inspect the current services running and enabled [root@rhel75lab ~]# katello-service list Redirecting to 'foreman-maintain service' Running Service List ================================================================================ List applicable services: dynflowd.service enabled foreman-proxy.service enabled httpd.service enabled postgresql.service…

Cluster/LINUX/Red Hat Linux cluster/red hat cluster March 12, 2020July 22, 2021 by Kew Runner

RHEL 6 Clustering

Cluster Software NameDetailRequiredcmanRed Hat Cluster ManagerYeslvm2-clusterCluster extensions for userland logical volume management toolsYesrgmanagerOpen Source HA Resource Group Failover for Red Hat ClusterYesricciRemote Cluster and Storage Management SystemYes Cluster Services DetailService NameStartup OrderCluster Manager: Manages the following services qdiskd, fenced, dlm_controld…

LINUX/Red Hat Linux/TechLab February 25, 2020February 25, 2020 by Kew Runner

Lab Hack: Kernel Parameter Tuning

Kernel parameter to swapping app memory out of physical RAM. Currently the it defaults to 60, however I have just learned that by setting it to 0 the kernel is given preference to keeping app memory in RAM instead of…

LINUX/Moments/Red Hat Linux rhel satellite server/satellite 6.6 August 22, 2019February 16, 2020 by Kew Runner

LAB NOTES: Satellite Server 6.6.0 Installation on RHEL 7.7

Started off this new installation on the bright side of things after having worked through DNS issues, so I muscled thru it and published an article on that solution. Now lets explore what it takes to install Satellite 6.6.0 on…

LINUX/Red Hat Linux bash/clear/history June 11, 2019February 16, 2020 by Kew Runner

Clear BASH history

To prevent a command from being added to the history in the first place, make sure that the environment variable HISTCONTROL contains among its colon-separated values the valueignorespace, for example (add e.g. to .bashrc): $ export HISTCONTROL=ignorespace This will prevent any command with a leading…

DNS/LINUX/Red Hat Linux/TechLab BIND/DNS/forward record/name resolution/PTR BIND/reverse record October 18, 2018February 16, 2020 by Kew Runner

Install & Configure DNS on RHEL 7.x for local domain name resolution

Working in the lab again, getting a bunch of RHEL Servers to create a nice Satellite & Capsules farm but ran into a snag, name resolution. [root@rhel77a Satellite-6.6.0 RHEL-7 x86_64]# satellite-installer --scenario satellite Unable to resolve forward DNS for rhel77a…