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unusual LINUX commands

1. file
          - Will list the file encoding details
          - Read man page for more details

2. pdftohtml
        - Utility to convert pdf file to html format

3. iconv -f -t
         - to change the file encoding from one format to another
 Ex:
      iconv -f UTF-16 -t ASCII filename.txt

       - Read man page for more supported encoding formats

4.  ls -R | grep -i **
      - List files in subdirectories

5.  last
      - To see the list of users who were connected to the system
      - It gives you the list with the details logon time, logon ip, user id etc.,

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