LinuxHostingSupport

You can perform a full backup of your account/domain from cPanel >> “Backups” option under the Files section. The full cPanel backup is very useful when migrating an account from one server to another.

1) Login to cPanel at http://yourdomainname.tld:2082 click the “Backups” option as shown in the screen below

2) On the next screen, cPanel will offer you various option to generate a full backup, i.e. to backup a home directory, databases, emails etc. Click on “Download or Generate a Full Website Backup” as shown in the following screen.

3) Here you will have to decide where you need to save the copy of the backup file by selecting the appropriate option from the “Backup Destination” drop down list.

a) “Home Directory” to keep the backup under your home directory itself i.e. /home/username. Click “Generate Backup” button to start the backup process and the backup file will be visible on the same screen once the process completes.

b) “Remote Ftp Server” if you want to send the backup file to a remote server in which case, you need to mention the Remote Server IP, Ftp user/password, port and directory. Click “Generate Backup” button and the backup file will be copied to the remote server once the process completes.

In either of the above case, you can specify an email address in the “Email Address” field to receive a notification.

Note: This cPanel generated backup cannot be restored from the cPanel interface. It can only be restored from shell as root OR from WHM interface.

The “mptctl” kernel module is required to check the RAID status on a Linux server using “mpt-status” tool. You may receive “/dev/mptctl: No such device” message OR “Make sure mptctl is loaded into the kernel” while checking the RAID status which indicates that the module is not loaded in the kernel OR the device “/dev/mptctl” is not created.

[root@server ~]# mpt-status
open /dev/mptctl: No such device
Are you sure your controller is supported by mptlinux?
Make sure mptctl is loaded into the kernel

To create the mptctl device, execute:

# mknod /dev/mptctl c 10 22

and verify it by

# ls -la /dev/mptctl
crw——- 1 root root 10, 220 Apr 12 08:05 /dev/mptctl

Once the device is created, load the module in the kernel using modprobe

# modprobe mptctl

and verify it using lsmod which should list the following modules along with it’s details

# lsmod |grep mptctl
mptctl
mptbase
scsi_mod

Add the module in /etc/rc.modules file to load the module in kernel on every reboot.

modprobe mptctl

Save the file. This will make sure the module is loaded in the kernel on every server reboot.

Once done, you will be able to check the RAID status by executing the ‘mpt-status’ command and it should show something like the following:

[root@server ~]# mpt-status

ioc0 vol_id 0 type IM, 2 phy, 465 GB, state OPTIMAL, flags ENABLED
ioc0 phy 1 scsi_id 1 ATA ST3500418AS CC38, 465 GB, state ONLINE, flags NONE
ioc0 phy 0 scsi_id 4 ATA ST3500418AS CC38, 465 GB, state ONLINE, flags NONE

We install a SSL certificate on a domain to secure the transaction carried out on a website but sometimes we receive an error message

“Invalid command “SSLEngine”, perhaps misspelled or defined by a module not included in the server configuration”

while browsing the website. The error message indicates that the module mod_ssl required to run SSL engine on a CentOS server is missing and needs to be installed.

Install the mod_ssl module using yum

#yum install mod_ssl

Once it is installed, make sure to restart the Apache service

#service httpd restart

You should now be able to browse the website using https.

You may receive the “linux/compiler.h: No such file or directory” error message while compiling ‘mpt-status’ tool with the kernel source. The error message looks like

mpt-status.h:6:28: error: linux/compiler.h: No such file or directory
make: *** [mpt-status] Error 1

The workaround of this issue is, to edit the mpt-status.h file which is under the downloaded directory

vi mpt-status.h

and remove the line which states

#include <linux/compiler.h>

Save the file and you should be able to compile ‘mpt-status’ using “make” with the kernel source.

The message “Warning: user mockbuild does not exist. using root” is received while installing a source rpm that was built using mock. The ‘mock’ module is required in this case which is responsible to build source RPMs (SRPMs) under a chroot environment and uses the ‘mockbuild’ user.

In order to fix the warning message, install the ‘mock’ module:

yum install mock;

and create the ‘mockbuild’ user

useradd -s /sbin/nologin mockbuild

Once done, you should be able to install the required tool under the mockbuild user.