Archive for category CompTIA

LPIC-2 certification

LPIC-2 diploma  LPIC-2 credential card

At last my certificate and card ID for LPIC-2 have arrived, which involve exams 201 and 202.  Unlike the LPIC-1 certification, it took more time to arrive (in fact I had to insist in delivering them) but finally they already arrived.

If you are interested in achieving this certification you can get further info at LPI ‘s page for LPIC-2


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100 Linux questions!

LPI CompTIA Linux+

100 Preguntas de Linux

Este cuestionario busca evaluar qué tanto sabes de Linux, además de ayudarte en los exámenes de certificación de Linux existente en el mercado, tales como LPI o CompTIA.

Puedes ir respondiendo cada pregunta, marcar algunas en las que tengas dudas para revisarlas posteriormente, y finalmente terminar con el cuestionario donde se mostrará el resultado obtenido. También puedes revisar las respuestas si haces clic en Comprobar las preguntas para que sepas las preguntas que respondiste correcta e incorrectamente, para que en caso de que te hayas equivocado sepas qué temas debes revisar.

Suerte!!


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How to create a ramdisk in Linux

ramdisk

A ramdisk is like a disk partition but running directly from the system’s RAM. All data read and written will be faster, and as drawback all data will be erase when you reboot the system. Some Linux distributions use this kind of file system to avoid killing the media, for instance instead of using a files system on a SD Card you can use a ramdisk.

If you need to create a partition of this type here is explained how to do it.

Creating the ramdisk with mount

To create the ramdisk in /tmp/ramdisk type the following commands:

# mkdir /tmp/ramdisk

# chmod 1777 /tmp/ramdisk

# mount -t tmpfs -o size=8G tmpfs /tmp/ramdisk/

 # df -h

 Filesystem Size Used Avail Use% Mounted on
 /dev/sda5 9.2G 533M 8.2G 6% /
 udev 7.9G 4.0K 7.9G 1% /dev
 tmpfs 3.2G 308K 3.2G 1% /run
 none 5.0M 0 5.0M 0% /run/lock
 none 7.9G 0 7.9G 0% /run/shm
 /dev/sda1 268M 50M 204M 20% /boot
 /dev/sda6 9.2G 552M 8.2G 7% /usr
 /dev/sda7 19G 172M 18G 1% /tmp
 /dev/sda9 490G 560M 464G 1% /var
 /dev/sda8 6.5G 143M 6.0G 3% /usr/local
 tmpfs 8.0G 0 8.0G 0% /tmp/ramdisk

Here you can see that the mount command creates a ramdisk by specifying tmpfs as the file system type, the size is given with the size option, and the mount point (which has all permission and the sticky bit enabled).

Creating the ramdisk from the /etc/fstab

If you want changed to be permanent you must add the following line to the /etc/fstab as shown below:

# RAM disk ramdisk
/tmp/ramdisk tmpfs mode=1777,size=8g

Here the device specified is ramdisk, the mount point is /tmp/ramdisk, the file system type is tmpfs, all permission are set for user, groups and other and the sticky bit is enabled, and the ramidisk’s size is defined by the size option.

References

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Novell’s certificates

Novell® Certified Linux Administrator Data Center Technical Specialist

Talking with a friend of mine I told him that LPI certifications validate a couple of Novell0’s certifications which in deed are just an incentive to continue the certification program Novell itself have. One of these certification Novell(R) Certified Linux Administrator and the other one is Data Center Techinal Specialist.

How can I get those certifications?

When you get the LPIC-1 go to the Novell’s page to include you LPI account info, therefore Novell will send you these certifications in digital (PDF format). Then my advice is to apply for CompTIA Linux+ Powered by LPI that have a agreement with the Linux Professional Institute to get your LPIC-1, and then validate your LPI account info at Novell’s to get these two extra certifications.

References:

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