iotop – Display top disk I/O utilization by process

iotop is just like top command but it displays i/o utilization per process.

This command is quite useful if you want to find out performance bottleneck due to i/o.

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Disable USB HDD Standby Mode

Below steps can help you to disable USB HDD standby flag

To get device report

$ sudo sdparm -a /dev/sde
/dev/sde: Seagate   FreeAgent Pro  400A
Power condition mode page:
IDLE        0  [cha: n, def:  0, sav:  0]
 STANDBY     1  [cha: y, def:  1, sav:  1]              <– 1 – standby flag is enabled
ICT         0  [cha: n, def:  0, sav:  0]
SCT       9000  [cha: y, def:9000, sav:9000]

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LS-Dyna Sense switch control

LS-Dyna has below sense switches. All these switches can be used on batch mode runs except last two.

type                      response
—–   ————————————————————
sw1.    a restart file is written and ls-dyna terminates.
sw2.    ls-dyna responds with time and cycle numbers.
sw3.    a restart file is written and ls-dyna continues calculations.
sw4.    a plot state is written and ls-dyna continues calculations.
sw5.    ls-dyna enters interactive graphics phase.
swa.    ls-dyna flushes all output i/o buffers.

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Free X server and SSH client for Windows

There are many free X servers available for Windows Operating System. But I personally excited to work on MobaXterm. It is very fast, easy to use & easy to deploy on the users workstations.  More interestingly, it comes with a single exe file that has X server & several network tools like ssh, sftp, rdp, etc., for remote computing.

Prior to this I was using Xming with putty to connect my Linux servers & open some engineering applications. But the visualization was not smooth & very slow.  Another issue with Xming was I never got login screen when I tried to access the server using XDMCP (Remote Unix Desktop) though I followed steps provided in the official document of Xming. I heard that these issues ware fixed in the latest Xming releases. But it is not available for free downloads.