I want to use my new USB drive exclusively with Linux, so I decided to wipe the factory default partitions and create a new ext4 filesystem on the drive. The drive uses 4096 byte physical sectors and we have to make sure that the new partition is correctly aligned. For some background information on partition alignment, see this link.
Check that we are wiping the correct drive
sudo parted /dev/sdb unit s print free
Note the details in case you want to restore the original partitioning scheme. Information on the factory default can also be found here.
When scanning an A5 booklet as individual A4 pages, but would still like to have them combined into an A5 PDF, the individual pages all end up in the ‘wrong’ place.
There are some scenarios when a bash script will not cut it. Not even a Perl script. Not even Python. Your problem calls for C, but at the same you do not want to write a full blown C program. The Tiny C Compiler comes to the rescue.
For the XFCE desktop environment Atril is the default PDF viewer and I also use it to open any PDF files from Firefox. It is a great lightweight document viewer which does what I need most of the time. One exception is when after opening a PDF file from Firefox I decide to keep the file and select File Save As. Atril insists on saving the file in $HOME/Documents, which is practically never the directory I want to use…
In xfce when you move a window around and it gets close to the top edge of the screen it suddenly jumps to maximised size – this is never what I want and so I find this feature really annoying.
The setting where this feature can be turned off is hidden in a somewhat counter intuitive location:
Yes, the setting is called ‘Accessibility – Automatically tile …’!
Occasionally when my scanner is emailing me a PDF it gets corrupted along the way. Most of the time the individual scanned images in the PDF are either perfectly valid or at least can viewed, even though the PDF viewer refuses to open the corrupt PDF file.
The bash script below will extract the images and then combine them again into a valid new PDF file.
If you have just received an e-mail similar to the one below, read on.
From: root@your.domain.org
To: sysadmin@your.domain.org
Subject: The certificate for server.your.domain.org will expire in 13 days
Date: yesterday (BST)
################# SSL Certificate Warning ################
Certificate for hostname ‘sws.hlan.laczik.org’, in file (or by nickname):
/etc/pki/tls/certs/localhost.crt
The certificate needs to be renewed; this can be done
using the ‘genkey’ program.
Browsers will not be able to correctly connect to this
web site using SSL until the certificate is renewed.
##########################################################
Generated by certwatch(1)
I found that I use my laptop’s touch screen more frequently – it is particularly useful for image editing. However, when I work in my (home) office I also use a multi-screen set-up with three monitors. The problem is that the touch region of the laptop screen automatically gets scaled to the overall size of my screen, which spans multiple monitors.
The Linux diff program can be used to record differences between two directories, making it easy to update the old directory later with any of the changes created in the new version of the directory.
I wanted to hide an element on a static page I recently created for my WordPress site.
The easiest way to do this is to create a custom CSS entry for the particular element, the title in my case.
There are occasions when you would like to list ssh tunnel connections
established to or from your server with information about the port numbers used.Continue reading List ssh tunnel connections→
There are occasions when you want to contact a user working at a remote computer, but his/her phone is switched off. If the remote user is running an X11 session, and you have ssh access to the remote computer, and you have root privileges on the remote computer, here is a solution.
My desktop computer has a wired connection to the internet and so the built-in wifi card is normally not used. I decided to enable and use it as a wireless access point.
Unfortunately NetworkManager will only create an ad-hoc wifi network, and Android devices will only connect to infrastructure access points. Don’t ask why… A rooted Android phone or tablet can be configured to connect to an ad-hoc network, and if a separate program can configure a Linux box to act as an access point, NetworkManager should be able to do the same. As far as I can see, there are no good technical reasons for either of these deficiencies.
After having installed Netbeans 7.0.1+dfsg1-5ubuntu2 I found that I cannot open old projects. Netbeans will find list the project directories, but will not open the projects. The solution is quite simple.
