What does sourcing a file means in Linux?

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Sourcing a file means to execute everything within a file.
Important point about Sourcing is that, it will execute the file within the current process/shell rather creating a new child process.


Sourcing can be done in two ways

1) using source keyword
   




2)Using dot
   







Enjoy Linux...!!!!







How to remove dpkg lock

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Sometimes, when we install any package, this following error comes

"dpkg status database is locked"


You can remove this lock simply by restarting but
hey common,
give me a break....
restart should be the last solution to every problem.
So,  just do this






Voila...error solved...!!!!!