体验ubuntu大版本升级1210-1304

这两天，ubu1210停止支持了，正好利用这个机会进行一次大版本升级测试
我下载的iso为x86版本，然后服务还带有邮件系统，测试学习用的。

参考文档

sudo apt-get install update-manager-core
do-release-upgrade -d

利用工具进行升级，但是很快就出现如下错误

点击(此处)折叠或打开

shell@promote:~$ do-release-upgrade
Checking for a new Ubuntu release
Traceback (most recent call last):
File "/usr/bin/do-release-upgrade", line 145, in
fetcher.run_options += ["--mode=%s" % options.mode,
AttributeError: type object 'DistUpgradeFetcherCore' has no attribute 'run_options'
shell@promote:~$

参考资料


解决办法

apt-get update
apt-get upgrade
do-release-upgrade

结论。ubuntu1210 iso这方面做都不好，需要给系统打下补丁后再升级。我也没有花心思找到关于升级任务的关键性package，（就不当小白鼠了），因为这个错误貌似只有1210才有。用户可以尝试 仅更新下apt等工具后再试。


也不清楚官方是否提供release update2 lts，如果一级一级的升级太浪费时间了。不做探讨研究，一切照文档老实的来。
do release工具会修改apt source到saucy/1310，然后apt下载慢慢来。

Do you want to start the upgrade?


1 installed package is no longer supported by Canonical. You can
still get support from the community.

80 new packages are going to be installed. 346 packages are going to
be upgraded.

You have to download a total of 200 M. This download will take about
7 minutes with your connection.

Installing the upgrade can take several hours. Once the download has
finished, the process cannot be canceled.

Continue [yN]  Details [d]

当前背景，1210支持18个月，刚过完。而1304支持9个月早就失去支持，所以就升级到了1310（也是9个月）。
有点意外，不过官方邮件谈了这个支持的问题。

The supported upgrade path from Ubuntu 12.10 is via Ubuntu 13.10, though
we highly recommend that once you've upgraded to 13.10, you continue to
upgrade through to 14.04, as 13.10's support will end in July.

升级过程需要一定的时间，当前有个信息或许需要补充一下

shell@mh3:~$ nmap 192.168.1.102

Starting Nmap 5.21 ( http://nmap.org ) at 2014-05-18 14:30 CST
Nmap scan report for promote.cache-dns.local (192.168.1.102)
Host is up (0.0080s latency).
Not shown: 993 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
25/tcp   open  smtp
110/tcp  open  pop3
143/tcp  open  imap
993/tcp  open  imaps
995/tcp  open  pop3s
1022/tcp open  unknown

Nmap done: 1 IP address (1 host up) scanned in 0.28 seconds
shell@mh3:~$

顺利完了后直接重启系统就好了。
大部分工作都由机器在负责，没别的特点，就是费时间。我这边虚拟机跑server+mail空业务大概超过两小时。
纯体力活，如果没业务必要选择升级，还是重装新的来的快，大概就1个小时吧，个人用户数据再复制一下。看具体情况。

System upgrade is complete.

Restart required

To finish the upgrade, a restart is required.
If you select 'y' the system will be restarted.

Continue [yN] y

Broadcast message from root@promote
        (/dev/pts/2) at 3:26 ...

The system is going down for reboot
=== Command detached from window (Sun May 18 03:26:36 2014) ===
=== Command terminated normally (Sun May 18 03:26:36 2014) ===Connection to 192.168.1.102 closed by remote host.
Connection to 192.168.1.102 closed.
shell@mh3:~$
shell@mh3:~$

差不多两个小时不到点。

shell@mh3:~$ ssh shell@192.168.1.102
shell@192.168.1.102's password:
Last login: Sun May 18 02:19:47 2014
shell@promote:~$
shell@promote:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 13.10
Release:	13.10
Codename:	saucy
shell@promote:~$
shell@promote:~$

这时候旧版本的内核还在，当然其他包已经处于更新最新的状态。
可以移除无用包了。