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By default, a new Fedora installation or a fedup upgrade on my dual monitor machine will result in GDM displaying the list of users and login screen on my left hand monitor. But I want it on my right hand monitor... Up until now, I simply logged in and set up the configuration I wanted using Settings -> Displays. …
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There are many different file formats and file extensions for storing certificates. It seems each time I come around to renewing a cert, I have forgetten what all the files and extensions mean. So for next time... Certificates are generally encoded in either Base64, PEM, or DEM formats. Base64 (.cer) Originally …
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Generally, if I have 100 files that I need to edit and make changes in, I tend to write a perl or python script to make them (if I have 3 files, I just open them in VIM and make them manually!) Yesterday however, a colleague who doesn't code had to change 2 consecutive lines in about 400 similar files and wanted a …
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I had an email about the minecraft.desktop file in the config file in a previous post. My kids love to play Minecraft, and installation of this simple GNOME .desktop file gives them the launcher icon on their desktops. 1cat << EOF > /usr/share/applications/minecraft.desktop 2[Desktop Entry] 3Version=1.0 …
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When it comes to customising GNOME, its config has always confused me - gconf, dconf, gconf-edit, gconftool - what are they all for? The furthest I've ever delved into them was copying and pasting some tips (give me my minimize and maximize buttons back!). My Linux work is almost exclusively with headless servers …
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Is there anybody in the IT industry that wasn't doing something with openssl in April? I don't use the openssl command line utility that often, but last week it reminded me that openssl command line tool is pretty comprehensive and has some nice features. I thought on this occasion I'd record the most useful ones so …
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Different ways to mirror a remote directory: 1wget -r --no-parent http://server/location If there are any files you don't want you can add the --reject option: < 1wget -r --no-parent --reject="tmp*" http://server/location 1curl
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Most modern x86 servers include out-of-band Management or Lights-out Management systems. These systems offer remote configuration and remote console access to a headless server normally located in a datacenter. These are typically used when first setting up a server, or perhaps when the server is hosed. The company I …
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Nearly all enterprise x86 servers include an out-of-band management interface such as HP iLO, IBM RSA or BMC, IPMI, Dell DRAC, etc. These are used for remotely power cycling, monitoring and what the data centre ops guys, confusingly for me, call KVM access (that's Keyboard Video Mouse not Kernel Virtual Machine!) As …
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Just typing "What is my external ip address" into Google is normally the most convenient way to find your external public IP address when you're behind a NAT'd broadband connection. The site ipconfig.me offers an alternative and clean way to get it from the command line, for example for use in a shell script: …
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