心血來潮，給筆記本裝了linux，版本是當下最火的mint。唔，使用體驗不錯～下面記錄的是修改mint鎖屏相關設置的修改方式。
In Linux Mint 13, the screen lock feature is disabled by default. After being idle for a while, the screen will be dimmed and you can re-activate it by moving the mouse or hit a key. For security reasons, you may want to enable the screen lock feature. Here is how to do it: Hit Alt + F2 and run "mateconf-editor" to open the Mate configuration window. Go to apps > mate-screensaver then check the line "lock_enabled". You can also edit the line idle_delay to change the minutes of inactivity time before the screen lock is activated.
在這里可以使能/取消lockscreen，修改鎖屏時延等。
或者，直接打開應用screensaver修改也是可以的。
另外，如果想更換解鎖界面的背景圖片，可以到/usr/share/backgrounds/linuxmint目錄下，修改這個軟鏈接指向目標圖片即可。