Linux pipelines and linux Pipelines

Source: Internet
Author: User

Linux pipelines and linux Pipelines

1. Create a new file touch a.txt> B .txt

2. Error redirection: 2> find/etc-name zhaoxing.txt 2> error.txt

3.input all information about the upload or error to log.txt find/etc-name passwd>/tmp/log.txt 2> & 1 find/etc-name passwd &>/tmp/log.txt

4. append>

5. Convert lowercase to uppercase (input redirection) tr "a-z" "A-Z" </etc/passwd

6. automatically create the file cat> log.txt <EXIT> ccc> ddd> EXI

7. How many files under/etc? Ls-l/etc/| grep '^ d' | wc-l

8. Check the number of files under/etc, and input the file details to ls-l/etc/| grep '^ d' in result.txt | tee result.txt | wc-l

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