12. Self-Learning Linux path: File processing class commands

Source: Internet
Author: User

commands for text-processing classes : Wc,word count
    Ctrl+d Submit
Number of lines of words bytes
    WC [option] [File] ...
      - L: Count rows
      - C: Statistics of bytes
      - W: Count the number of words
    TR: Convert or delete character, tr ' Set 1 ' Collection 2 ', must use pipe
Convert character: Converts the correspondence of the first character set to the corresponding transformation in the second character set
      - d: Delete A character set that has occurred


#echo "Hello World" | Tr ' ABCDEFG ' ABCDEFG ' (piping)

#cat/etc/issue | Tr ' A-Z ' a -Z ' (piping)

12. Self-Learning Linux path: File processing class commands

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