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Fix NTFS partition errors under Linux

ubuntu10We'll use Ubuntu for this example, but essentially you need an ntfs-3g package, which contains ntfsfix. Under Ubuntu, run the following to install it:

sudo apt-get install ntfs-3g

Then this (where /dev/sdd1 would be your ntfs disk):

ntfsfix /dev/sdd1

Depending on what you are trying to fix, you may want to use options -b and -d.

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Create a PDF from a series of images

pdf-logoWe often get asked, if there's a simple way to join PDFs from many images under linux. The task is very trivial, if you have 1-2 images, as you can use many of the graphical applications. If you have 10-20 or more, we recommend pdfjoin. It runs under Linux on a command line and allows for a quick images to PDF combine.

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Schedule nightly reboot in linux

Linux IT SupportSometimes it is a good idea to schedule a regular reboots, to clear the memory and remove any crashed processes.

This can be easily achieved by adding the task to a cron tab (Linux scheduling system):

First, open the crontab (as a root):

crontab -e

and add a line similar to this:

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Mount windows share in Linux (fstab)

Ubuntu Support and Consulting

This works on any modern distribution of Linux, but we are using Ubuntu 14.04 for the process. First, install CIFS/Samba tools, required to mount the share point:

In Ubuntu:

apt-get install cifs-utils

Now let's create the credentials file:

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Add a software raid to Linux

linux-icon-19This tutorial is for adding extra disks to an already existing system, not conerting current ones to RAID. We are adding a RAID1 software RAID to most common Linux distributions (this should work on any one of them).

We have used 2 disks for this:
/dev/sdb: 500.1
/dev/sdc 500.1

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Unmount a drive when it is busy

There are some circumstances where you have to unmount a drive, but it is not letting you. Giving an error, similar to this:

umount: /mnt/backup: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

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Reserve IP in OpenVPN

openvpn-logo-300x300The IPs in the VPN are assigned randomly. If you have your router configured using something like Tomato, you can setup the reservation by MAC address. For the linux-based install, follow these steps:

1) To begin, first identify the directory, where the files will be stored:

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