Ubuntu Tips - Revision history

Joe: /* VirtualBox Hash sum mitmatch */

2011-11-28T07:03:36Z

VirtualBox Hash sum mitmatch

← Older revision		Revision as of 00:03, 28 November 2011
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	rm /var/cache/apt-cacher-ng/changelogs.ubuntu.com/meta-release		rm /var/cache/apt-cacher-ng/changelogs.ubuntu.com/meta-release

	=== VirtualBox Hash sum ~~mitmatch~~ ===		=== VirtualBox Hash sum mismatch ===
	When trying to get virtualbox, I kept seeing errors from apt-get update. I removed the following files and was able to install/upgrade virtualbox.		When trying to get virtualbox, I kept seeing errors from apt-get update. I removed the following files and was able to install/upgrade virtualbox.

2010-05-11T23:11:21Z

Links

← Older revision		Revision as of 16:11, 11 May 2010
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	You may get some false positives, but at least it gives you an indication of the majority of the files. I think RedHat has an easier and better method and I'll update this section when I find a better method for Ubuntu.		You may get some false positives, but at least it gives you an indication of the majority of the files. I think RedHat has an easier and better method and I'll update this section when I find a better method for Ubuntu.

			== Disable automounting of USB drives ==
			Sometimes I need to be able to connect a USB drive and not have it automatically mount the device. The following command will disable this function

			gconftool-2 --type bool --set /apps/nautilus/preferences/media_automount false

			And this command will enable it again.

			gconftool-2 --type bool --set /apps/nautilus/preferences/media_automount true
	== Links ==		== Links ==
	Here are some useful links		Here are some useful links

2010-03-30T21:39:06Z

Old Kernel cleanup

2010-03-30T21:38:12Z

Old Kernel cleanup

← Older revision		Revision as of 14:38, 30 March 2010
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	== Old Kernel cleanup ==		== Old Kernel cleanup ==
	I have not found an easy way to clean up old kernels on Ubuntu so I wrote a small function that runs in bash to removed them. It should leave most 2 recent kernels on the system. Use at your own risk, Below is the ~~snipet~~ of code I put in my ~/.bashrc file to allow me to clean up old kernels. After you source the .bashrc file, you can then type kernel_cleanup and it will prompt you to remove the kernel and header files.		I have not found an easy way to clean up old kernels on Ubuntu so I wrote a small function that runs in bash to removed them. It should leave most 2 recent kernels on the system. Use at your own risk. Below is the snippet of code I put in my ~/.bashrc file to allow me to clean up old kernels. After you source the .bashrc file, you can then type kernel_cleanup and it will prompt you to remove the kernel and header files.

	function kernel_cleanup()		function kernel_cleanup()

2010-03-30T21:36:56Z

← Older revision		Revision as of 14:36, 30 March 2010
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	sudo adduser <username> admin		sudo adduser <username> admin

			== Old Kernel cleanup ==
			I have not found an easy way to clean up old kernels on Ubuntu so I wrote a small function that runs in bash to removed them. It should leave most 2 recent kernels on the system. Use at your own risk, Below is the snipet of code I put in my ~/.bashrc file to allow me to clean up old kernels. After you source the .bashrc file, you can then type kernel_cleanup and it will prompt you to remove the kernel and header files.

			function kernel_cleanup()
			{
			cur=$(uname -r)
			for ver in $(dpkg -l \| grep linux-image-2\| grep -v $cur \| awk '{print $3}'\| sed 's/\.[0-9]*$//' \| sort -rn\| tail -n +2 )
			do
			echo $ver
			prm=$(dpkg -l \| grep $ver \| awk '{print $2}')
			echo $prm
			echo -n "Remove Packages (Y/n): "
			read x
			if [ "$x" = "n" ] ; then
			echo "Not removing"
			continue
			fi
			sudo dpkg -P $prm
			sudo rm -rf /lib/modules/$ver-generic
			done
			}

	== Apache ==		== Apache ==

2010-03-10T18:52:08Z

Distribution Tips

2010-03-10T18:51:48Z

Distribution Tips

2009-12-22T03:03:43Z

Check dpkg MD5 checksums

← Older revision		Revision as of 20:03, 21 December 2009
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	done		done

	You may get some false positives, but at least it gives you an indication of the majority of the files. I think RedHat has an easier and better method and I'll update this section when I find a better method.		You may get some false positives, but at least it gives you an indication of the majority of the files. I think RedHat has an easier and better method and I'll update this section when I find a better method for Ubuntu.

	== Links ==		== Links ==

2009-12-22T03:03:18Z

Links

← Older revision		Revision as of 20:03, 21 December 2009
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	This link has everything you want to know about the new grub2 options. http://ubuntuforums.org/showthread.php?t=1195275		This link has everything you want to know about the new grub2 options. http://ubuntuforums.org/showthread.php?t=1195275

			== Check dpkg MD5 checksums ==
			I'm sure there is an easier way, but I kept looking up this information. If you want to ensure that the files installed on your system match the checksums when the package was install, you can create the following script. I call mine, dpkg_md5check
			#!/bin/bash

			cd /
			for i in /var/lib/dpkg/info/*.md5sums;
			do
			sudo md5sum -c $i \|grep -v 'OK$'
			done

			You may get some false positives, but at least it gives you an indication of the majority of the files. I think RedHat has an easier and better method and I'll update this section when I find a better method.

	== Links ==		== Links ==

2009-11-28T15:04:21Z

Distribution Tips