How to use Linux

How to manage tasks by command

jobs :show the tasks running or stopped
bg [Order Number]:run the task stopped
fg [Order Number]:stop the task running
ApplicationName & :running the application

Switch user

su - :change to SuperUser
If you can't run the command,try "sudo passwd root" to change the password of root first.
While you see the "#" sign but "$" means you are superuser now.
passwd :change current user's password

Switch folder and file

pwd :print current dictionary
ls :list current dictionary
-a list all dictionary and files(including hidden dictionary and files)
-l show detail information
touch :create a new file

Some Sign about the Path:
~  :the user's home dictionary
.. :upper level dictionary
.  :current dictionary
-  :the last working dictionary you visited

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