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How can I upgrade Ubuntu 12.04LTS to 14.04LTS

Asked by MadhuSoodanan

I wish to Upgrade Ubuntu 12.04LTS to 14.04 LTS. But the instructions available is about Ubuntu 13.10. At present I can't use any CD or USB Stick to take a backup (to store my 50GB data).
Is there any command for this....for upgrading from an LTS to the next LTS? I can't see any Software Updater.
In older versions Update Manager had asked for Upgrading.................may be it is for Updating only.

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Warren Hill
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MadhuSoodanan (mt-madhu) said : 		#1

Need I wait till the following problem is solved?

    Configuration of the package tex-common fails when 12.04 LTS is upgraded to 14.04 LTS (1304972)

    Configuration of flightgear fails during upgrade from 12.04 LTS to 14.04 LTS (1308338)

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MadhuSoodanan (mt-madhu) said : 		#2

Need I try
sudo update-manager -d

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Best Warren Hill (warren-hill) said : 		#3

For LTS releases the update manager does not normally offer the next LTS until the first point release

In this case that will be that will be 14.04.1 expected out around July 24

See here
https://wiki.ubuntu.com/TrustyTahr/ReleaseSchedule.

Do you need to wait for the bugs you mention to be fixed?
Depends do you have those packages installed.

You can check the first one by entering the following command in a terminal

 dpkg -l | grep 'tex-common'

If you see something like this you are using the package

ii tex-common 2.10 common infrastructure for building and installing TeX

you can check the second with

dpkg -l | grep 'flightgear'

In my case I don't have it installed.

If you have either installed then I'd suggest you either wait or install fresh from USB or CD making sure you backup first.

I'm personally going to wait for the point release before I upgrade to give others the opportunity to find any bugs so they are fixed before I risk upgrading but if you are not using either of these packages (they are not part of a default install) and you don't want to wait

sudo update-manager -d

should allow you to update. Remember to backup anything important first however. You shouldn't lose anything but it's always better to be safe than sorry.

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MadhuSoodanan (mt-madhu) said : 		#4

I didn't get any output for dpkg -l | grep 'tex-common'
I used the enter key also. I think there is no output.
Will the 'Backup' app given as default useful for this purpose? I have no external hard drive ..... I have taken a backup using this app. Can I believe it after I used sudo update-manager -d command?

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MadhuSoodanan (mt-madhu) said : 		#5

I didn't install the tex-common or fightgear. So no problem with them. I thought that might be the problem of unavailability of Upgrading instructions regarding 12.04LTS.
Though I have kept about 60% of the data in CDs, my CD drive is useless now. No problem with USB drive. I have 4 GB USB stick.

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actionparsnip (andrew-woodhead666) said : 		#6

Did:

sudo update-manager -d

Work, as was suggested earlier?

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MadhuSoodanan (mt-madhu) said : 		#7

Since it takes a long time I shall do it tomorrow and I shall give a reply (as solved).....Thanks

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MadhuSoodanan (mt-madhu) said : 		#8

Upgraded Ubuntu 5 minutes ago. This reply is via Ubuntu 14.04LTS.
I was busy these 2 days. I couldn't sit at my system. May be eagerly waiting for my reply :) Sorry for the delay.
Dear Warren Hill, your detailed reply will clear the doubts of users like me. Thanks a lot. Dear Actionparsnip, your short, timely reply made me confident to stick to that Terminal command. Thanks :)

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MadhuSoodanan (mt-madhu) said : 		#9

Thanks Warren Hill, that solved my question.