Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Przewodnik Instalacji Pobierz pdf (Strona 11)

sudo service postgresql initdb

To ensure the postgresql service starts on boot and to start the service now:

sudo chkconfig postgresql on

sudo service postgresql start

Check the version of PostgreSQL using:

psql --version

Check the data directory is set using the psql command-line utility:

sudo -u postgres psql -c 'show data_directory'

4.4.3 Install Other Packages

Install the other required packages:

sudo yum -y install redhat-lsb-core

sudo yum -y install ImageMagick

sudo yum –y install openmotif

4.5 Prepare Linux VM for Hypervisor

Some changes are required when running the Linux VDA as a virtual machine on a supported

hypervisor. Make the following changes according to the hypervisor platform in use. No changes are

required if running the Linux machine on bare metal hardware.

4.5.1 Citrix XenServer

4.5.1.1 Fix Time Synchronization

If the XenServer Time Sync feature is enabled, within each paravirtualized Linux VM you will

experience issues with NTP and XenServer both trying to manage the system clock. To avoid the

clock becoming out of sync with other servers, the system clock within each Linux guest must be

synchronized with NTP only. This requires disabling host time synchronization. No changes are

required in HVM mode.

If running a paravirtualized Linux kernel with XenTools installed, you can check whether the

XenServer Time Sync feature is enabled from within the Linux VM:

su -

cat /proc/sys/xen/independent_wallclock

This will return either:

 0 - The time sync feature is enabled, and needs to be disabled.

 1 - The time sync feature is disabled, and no further action is required.

If enabled, disable the time sync feature by writing 1 to the file:

sudo echo 1 > /proc/sys/xen/independent_wallclock

To make this change permanent and persist after reboot, edit the /etc/sysctl.conf file and add the

line:

xen.independent_wallclock = 1

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Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Przewodnik Instalacji Strona 11