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1. In Erlang, when a process's mailbox growth bigger, it runs slower, why?
   3 votes
2. Running strace with a -o (redirect the trace output) parse the trace output while printing the stdout
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3. Perl, to find the common lines between text files in a Dir
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4. Extract a word between brackets and replace it in a sentence
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5. wget ERROR: The certificate of ‘xyz’ is not trusted, has expired
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