將 Ubuntu 升級到 18.04 版時出現問題

我正在嘗試將我的 Ubuntu 安裝從 16.04 升級到版本 18.04

軟體升級沒有提供任何升級，因此我嘗試使用命令行進行升級，並遵循了這組命令：https ://linuxconfig.org/how-to-upgrade-to-ubuntu-18-04-lts -仿生海狸

但我收到沒有升級的消息：

m@m-XPS-M1530:~$  lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.4 LTS
Release:    16.04
Codename:   xenial
m@m-XPS-M1530:~$ sudo apt update
[sudo] password for m: 
Sorry, try again.
[sudo] password for m: 
Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease                   
Hit:2 http://dl.google.com/linux/chrome/deb stable Release                     
Hit:3 http://packages.microsoft.com/repos/vscode stable InRelease              
Hit:5 http://ppa.launchpad.net/atareao/telegram/ubuntu xenial InRelease        
Get:6 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]     
Hit:7 http://ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu xenial InRelease
Hit:8 http://ppa.launchpad.net/libreoffice/libreoffice-prereleases/ubuntu xenial InRelease
Hit:9 http://ppa.launchpad.net/noobslab/apps/ubuntu xenial InRelease           
Get:10 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [67.5 kB]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [68.0 kB]
Get:12 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 DEP-11 Metadata [107 kB]
Get:13 http://security.ubuntu.com/ubuntu xenial-security/universe DEP-11 64x64 Icons [142 kB]
Hit:14 http://gb.archive.ubuntu.com/ubuntu xenial InRelease                    
Get:15 http://gb.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Get:16 http://gb.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:17 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [767 kB]
Get:18 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [708 kB]
Get:19 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [319 kB]
Get:20 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [224 kB]
Get:21 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 DEP-11 Metadata [246 kB]
Get:22 http://gb.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [326 kB]
Get:23 http://gb.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,964 B]
Get:24 http://gb.archive.ubuntu.com/ubuntu xenial-backports/main amd64 DEP-11 Metadata [3,328 B]
Get:25 http://gb.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 DEP-11 Metadata [5,088 B]
Fetched 3,309 kB in 14s (225 kB/s)                                             
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up-to-date.
m@m-XPS-M1530:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
m@m-XPS-M1530:~$ sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
m@m-XPS-M1530:~$ sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
m@m-XPS-M1530:~$ sudo apt install update-manager-core
Reading package lists... Done
Building dependency tree       
Reading state information... Done
update-manager-core is already the newest version (1:16.04.12).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
m@m-XPS-M1530:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
No new release found.

有什麼問題，我該如何解決？

我使用的筆記型電腦是相對較舊的筆記型電腦，帶有 3G 記憶體。

那是因為目前發布的版本是 18.04.0。對於現有的 LTS¹ 使用者，升級從 18.04.01 起自動可用。

如果您現在堅持升級，請隨意使用：

do-release-upgrade --devel-release

（我沒有升級：我喜歡其他人有問題並為我調試版本 0） >:-)

¹LTS = 長期支持。

引用自：https://unix.stackexchange.com/questions/440552