It is now possible to upgrade the Cinnamon and MATE editions of Linux Mint 18, 18.1 and 18.2 to version 18.3.
Upgrades for the Xfce and KDE editions will be available later this year, once these editions have been released as stable.
If you’ve been waiting for this we’d like to thank you for your patience.
升级到Linux Mint 18步骤
Timeshift was backported to Linux Mint 18, 18.1 and 18.2. You can use timeshift to make a system snapshot before the upgrade.
If anything goes wrong, you can easily restore your operating system to its previous state.
To install timeshift, open a terminal and type：
apt install timeshift
Launch Timeshift from the application menu, follow the instructions on the screen to configure it and create a system snapshot.
Disable your screensaver
If you installed Cinnamon spices (applets, desklets, extensions, themes), upgrade them from the System Settings
3.升级Linux Mint 18.3
Upgrading to Linux Mint 18.3 is relatively easy.
In the Update Manager, click on the Refresh button to check for any new version of mintupdate and mint-upgrade-info. If there are updates for these packages, apply them.
Launch the System Upgrade by clicking on “Edit->Upgrade to Linux Mint 18.3 Sylvia”.如下图所示：
Follow the instructions on the screen.如下图所示：
请按照上面图示方法操作，当被问及是否替换或保留配置文件时请选择替换它们。升级完成后请重新启动操作系统即可完成到Linux Mint 18的升级。
Although Linux Mint 18.3 features a newer kernel, this upgrade does not change the kernel on your behalf. This is a decision only you should take.
Same goes for the choice of display manager or the software selection. Applications won’t be removed or switched on your behalf. You can decide to make these changes, but you certainly don’t have to.
After the upgrade, you can install newly introduced applications such as redshift-gtk and mintreport from the repositories.
If you are running Cinnamon or MATE and the upgrade is not available to you, check that you have the latest versions of mintupdate and mint-upgrade-info installed. If the latest versions are not yet available in your mirrors, switch to the default repositories.
This happens rarely, but if you ever got locked and were unable to log back in, switch to console with CTRL+ALT+F1, log in, and type “killall cinnamon-screensaver” (or “killall mate-screensaver” in MATE). Use CTRL+ALT+F7 or CTRL+ALT+F8 to get back to your session.