Lenovo IdeaPad S10 FR - Manual (Page 113)

Chapter 7. Using Linpus Linux Lite
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Task manager
Similar to Windows system, you may use <Ctrl> + <Alt> + Del at any time
to start task manager, and end up the selected processing directly in
Processes tab.
Note:
Some process only allows super users to initiate, compulsory end of which
may lead to failure or abnormal system operation. Unless you are familiar
with Linux system, please use window close button to end up the program.