GNU/Linux - useful commands

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Micro sd read only ubuntu

I wasn't able to format a micro sd card using ubuntu. So I saw several threads but none worked on my device. The following steps allowed me to format it. This wasn't my sd card so I was able to validate all once, but not find if all steps are required. #Find the device you want to access: sudo fdisk -l #Example output: /dev/sdb1 #Set some variables to ease the access to your device DEV=dev/sdb DEVX=dev/sdb1 #The following code lines seemed to fix the problem, including the last one. Them alone don't seem to work sudo chown ${USER}:${USER} -R ${DEV} sudo chown ${USER}:${USER} -R ${DEVX} find ${DEV} -type d -execdir chmod 777 -Rv {} + find ${DEVX} -type d -execdir chmod 777 -Rv {} + chmod 777 ${DEV} chmod 777 ${DEVX} sudo mount -orw,remount ${DEV}
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Block web sites on Windows

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Here is how to make your windows computer (Not Server) to become a DNS server. Why should you do that? Avoid webpages to redirect you to anoying sites, publicity you don't need, or if you want to restrict access so some pages without having a proxy server or software. There are a vast number of web pages that when you click on something, they open a new window and connect you to a different web site, this other web sites may contain only unuseful content or dangerous content. Ways to avoid it: a)  Include your URLs in your web browser restriction access list. Limitations:  It is needed to configure a per communication protocol domain restriction list, I find it not very flexible. b)  Configure your windows  C:\Windows\System32\drivers\etc\hosts  file . This method overcomes option  a)   by adding only one line per web site   protocol connection (ftp, http, https, etc), so you have to configure only one line to avoid whatever the...
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Xencenter on GNU/Linux

In this publication will be present the steps to install Xencenter on Linux. Software used: Ubuntu 16.04.1 LTS (To see this use the comand lsb_release -a ) PlayOnLinux 4.2.10 XenCenter version 6.5 (build 6.5.2.2477) 32-bit As may be seen the way to do it is by using playonlinux, for which the way to install it is: sudo apt-get install playonlinux Once installed playonlinux, select Install, Install a non-listed program, after this select Install a program in a new Virtual Drive. When you be asked What would you like to do before installation , select the three checkboxes. When you be asked to configure a version of wine to use, you can choose 1.7.37 or 1.9.17 (Tested). In the popped up windows for wine configuration check that the Windows version box is set on Windows XP. Select a 32-bit installation. In the component installation select the following components (They appear in that order): POL_install_dotnet40 POL_Install_ie8 POL_Install_tahoma2 During the n...
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