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Archive for January, 2012


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Access logs for particular domian – Cpanel

Tuesday, January 31st, 2012

You need to use the below command

# grep username /usr/local/cpanel/logs/access_log

References

http://forums.cpanel.net/f185/how-can-i-check-logs-cpanel-account-244041.html

Maldet installation in Linux (Scan Linux Files) Cpanel

Tuesday, January 31st, 2012

Refer to the below for the installation guide

wget http://www.rfxn.com/downloads/maldetect-current.tar.gz
tar -xzvf maldetect-current.tar.gz
cd maldetect-*
sh install.sh

How to use it

maldet -a /public_html

or maldet -a /home

or to scan all the public_html for all the domains in the home directory

maldet –scan-all /home?/?/public_html

references

http://vishnulinux.wordpress.com/2011/08/25/maldet-scan-installation/

Thank you.

Raid and Sync in Linux

Sunday, January 29th, 2012

if you want to see the raid sync live then you can use the following command

watch cat /proc/mdstat

if you don’t want to see life, you just want to see finish or not then you need to use the below command

cat /proc/mdstat

or

more /proc/mdstat

for example if you are using raid1 and one of the hard disk got issue, then you need to change the hard disk and sync it with the other hard disk, you want to make mirror, so you need to follow the below instruction

to see the partition list you need to run the below command

fdisk -l

then you will see almost same like the below result

root@bear1 [/home/wpcsbco]# fdisk -l

Disk /dev/sda: 1500.0 GB, 1500084436992 bytes

255 heads, 63 sectors/track, 182374 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          26      208813+  83  Linux

/dev/sda2              27        5248    41945715   82  Linux swap / Solaris

/dev/sda3            5249        8381    25165822+  83  Linux

/dev/sda4            8382      182374  1397598772+   5  Extended

/dev/sda5            8382       10209    14683378+  83  Linux

/dev/sda6           10210       12037    14683378+  83  Linux

/dev/sda7           12038       12298     2096451   83  Linux

/dev/sda8           12299      182374  1366135438+  83  Linux

Disk /dev/sdb: 322.1 GB, 322122547200 bytes

255 heads, 63 sectors/track, 39162 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1       39162   314568733+  83  Linux

Sda1 or 2 or 3 mean the patrrtion in the hard disk

but sda or sdb or sdc mean the hard disk device,

once you plug in the hard disk to the server, then you need to run Fdisk -l to see the new hard disk already added as sdb or sdc like that

for example if the new hard disk added as sdb then you need to make the partition before syn, and make sure the partition same like the first hard disk partition

for example the first harddisk partition is below

(Figure 2)

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          26      208813+  83  Linux

/dev/sda2              27        5248    41945715   82  Linux swap / Solaris

/dev/sda3            5249        8381    25165822+  83  Linux

/dev/sda4            8382      182374  1397598772+   5  Extended

/dev/sda5            8382       10209    14683378+  83  Linux

/dev/sda6           10210       12037    14683378+  83  Linux

/dev/sda7           12038       12298     2096451   83  Linux

/dev/sda8           12299      182374  1366135438+  83  Linux

How to get the above result? you need to run this command  fdisk /dev/sda

Then after that you need to press “P” command to show the partition details

you make sure that you write down all the details then after that you need to press “q” to quit

and go enter to new hard disk to make the partition first

for example the new harddisk is sdb

fdisk /dev/sdb

then press p you will see nothing there, then you need to press  “n” to create the new partition

Once you press “n” then you will get two option

1- Extended

2- Primary

then you need to select primary

then will ask you the block sector starting point, you can get it from the main hard disk , refer to figure (2) , be inform that you are now working to do the sdb1 which is the first partition, and also will ask you about the end point, you can get it from the main hard disk which is form figure (2) why we use the result of hard disk one in the hard disk two? because they are must be same partition then the sync will be working fine, because raid1 mean two hard working as one hard, the second hard will be the mirror for the first hard disk

then after the end point you need to press “t” to select the fs type (file system type, which is mean linux, you can refer to figure (2) you will see linux using ID 83, that mean we need to use the same here in the second hard disk

that mean t used to select the file system type

“notes”

if you want to list and see all the tpye then you need to press “L” then you will see all the fs type, which is even you will find linux there using 83

after you done the partition for the sdb1 then you need to repeat the same step for sdb2 which is again press n to create the partition by referring to figure 2 and also t to select the file system type, which is i can see in the figure two that sda2 using swap which is 82, so that mean you need to use it for sdb2 as well

in the end to save what you have done then you need to press “w” which is mean write

or if you want to quit then you need to press “q”

———————–

i will list all the command used

p for list of partition

n for create partition

l for list of the file system type

w to save the change

q to quit

That is all and thank you.

Whitelist ip in brute force

Sunday, January 29th, 2012

SSH to the server and run the below command, just you need to change the ip or ip range to your ip

/scripts/cphulkdwhitelist 124.212.220.0/24

Thank you.

PHP-FFMPEG installation in linux server

Tuesday, January 24th, 2012

In order to install it, you need to follow the below instructions

# mkdir /usr/local/src
# cd /usr/local/src
# wget http://downloads.sourceforge.net/project/ffmpeg-php/ffmpeg-php/0.6.0/ffmpeg-php-0.6.0.tbz2
# tar jxf ffmpeg-php-0.6.0.tbz2
# cd ffmpeg-php-0.6.0
# perl -i -p -e "s/PIX_FMT_RGBA32/PIX_FMT_RGBA/g;" ffmpeg_frame.c
# phpize
# ./configure && make clean && make && make install

and add  extension=ffmpeg.so in php.ini file which is located at /usr/local/lib/php.ini

after that restart Apache and check

reference
http://forums.cpanel.net/f5/imagick-php-ffmpeg-gd-install-problem-does-not-show-phpinfo-page-please-help-198202.html

Expanding Virtual Hard Disks with Hyper-V

Sunday, January 22nd, 2012

One of the most frequent questions I see on forums and newsgroups that deal with virtualization is the age-old question of “I have used all the space inside a VHD hard disk. How do I expand the virtual hard disk to make room for additional data?”. Luckily for us, with Microsoft Hyper-V on Windows Server 2008, this is now possible. Hyper-V now adds the ability to increase the maximum size of a virtual hard disk.  Expanding the disk increases the storage capacity of a dynamically expanding virtual hard disk or a fixed virtual hard disk.

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Before using the ability to expand the VHD hard disk you must take the following issues into consideration:

  • You must first completely shut down the virtual machine. You cannot expand a virtual hard disk that is associated with a running or saved stated virtual machine.
  • If you expand a virtual hard disk that is associated with a virtual machine that has snapshots, these snapshots will be invalidated. If you need the snapshots, you’d better make sure you plan ahead of time, and/or create new snapshots after performing the expansion of the hard disk.
  • Make sure no snapshots are associated with this VM.

  • After expanding the virtual hard disk there will be an empty space at the end of the virtual hard disk, just like not using the entire disk when you’ve originally created partitions in it.  You will either need to create a new partition to use the new space, or expand an existing partition into the new space.

Note: Expanding or extending partitions on Windows Vista and Windows Server 2008 is easier than on Windows Server 2003 or Windows XP, and is performed by using either the Disk Management snap-in from the Computer Management tool, or by using the DISKPART command. Please read my How to Extend a Disk Partition in Windows Vista and Server 2008 article for more information.

Follow these steps to expand VHD hard disks:

  1. Open the Hyper-V management tool from the Administrative Tools folder (or by typing virtmgmt.msc in the Run command).
  2. Start the Edit Virtual Hard Disk wizard by selecting Edit Disk…
  3. If the Before you begin window appears, click Next.
  4. Select the virtual hard disk you want to expand. Click Open and then Next.
  5. Select Expand on the Choose Action page and then press Next.
  6. Enter the new size of the virtual hard disk that you want and then press Next.
  7. In the final screen, press Finish.
  8. Wait till the operation finishes, which should be quite fast.

Next, after booting the VM, use Disk Management snap-in from the Computer Management tool, or by using the DISKPART command to expand the partition within Windows. While possible in Windows Server 2008 and Windows Vista, unfortunately, in Windows 2000/XP/2003, you cannot use the built-in tools to expand the System Partition (the one the Windows operating system is installed on). For these versions you will need to use of these free partition utilities.

Reference

http://www.petri.co.il/expanding-virtual-hard-disks-with-hyper-v.htm

How to: attach a usb disk to a Hyper-V virtual machine

Sunday, January 22nd, 2012

How to: attach a usb disk to a Hyper-V virtual machine

As the most of you know, Hyper-V does not support usb redirection. But with some relative easy steps we can redirect our usb disk to a Hyper-V virtual machine.

First on your Hyper-V Server host open Server Manager and select Disk Management

Then select your usb disk and right mouse click and choose Offline.

When done we close Server Management and open Hyper-V Manager. Select the settings of the virtual machine you would like to attach the usb drive to.

Select IDE Controller or SCSI Controller. Before you choose let me explain why I would choose the SCSI controller instead of the IDE controller for an usb redirected drive. A Hyper-V virtual machine can only boot from an IDE hard drive, you can only add a dvd drive on an IDE controller, you can only add 4 IDE devices. Another thing I would prefer to add an usb disk to the SCSI controller is I can add or remove disks to the virtual machine when it is running, to add an IDE controller disk I need to stop the virtual machine then add the disk and then start the virtual machine.

Now to add your usb disk to you virtual machine we choose Add

Now we choose for Physical hard disk: and choose the disk we would to add. If you have more disks available you can choose from a simple pull down list. You will only see here the disks that are set to offline so that was the first step we had to do. If you would like to add an internal hard disk you have to put it offline before you can add it.

Note: before you set another disk offline be sure there are no operating, system or application files on it because otherwise these or your whole server will crash.

When finished choose OK on the bottom of the screen and the disk is added to your virtual machine.

When we are going to look at your virtual machine and open Disk Management.

You will see the disk directly attached and you can use it within your virtual machine

If you would remove the drive from the virtual machine, go back to your Hyper-V Manager virtual machine settings on your host server.

Select the drive and choose remove and choose Apply or OK at the bottom of the screen.

After you have removed the disk from the virtual machine go back to Disk Management

Right click the drive and choose Online. Now the drive is available on your host server.

You can use this if you need to copy some files directly from the usb disk to the virtual machine or vice versa. Another thing you could use this is for is Windows / SBS backup this needs a local attached disk, although I don’t think this is a supported configuration! You can even if you have chosen for the SCSI controller change the backup disk when your virtual machine is running.

Thank you.

References

http://blog.ronnypot.nl/?p=721