----------------------------------------
Command line: ls | wc  -l

Command 1: ls
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: wc
    Arguments:
        |-l|
    Standard input:  [pipe]
    Standard output: [screen]
----------------------------------------
Command line: ls | wc

Command 1: ls
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: wc
    No arguments
    Standard input:  [pipe]
    Standard output: [screen]
----------------------------------------
Command line: ls | wc  -l > out

Command 1: ls
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: wc
    Arguments:
        |-l|
    Standard input:  [pipe]
    Standard output: out
----------------------------------------
Command line: a | b | c

Command 1: a
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: b
    No arguments
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: c
    No arguments
    Standard input:  [pipe]
    Standard output: [screen]
----------------------------------------
Command line: a 1 < a3/1/2/3 | b 1 2 3 | c  -a  -bb  --c-c-c- | >  d.out  d

Command 1: a
    Arguments:
        |1|
    Standard input:  a3/1/2/3
    Standard output: [pipe]

Command 2: b
    Arguments:
        |1|
        |2|
        |3|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: c
    Arguments:
        |-a|
        |-bb|
        |--c-c-c-|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 4: d
    No arguments
    Standard input:  [pipe]
    Standard output: d.out
----------------------------------------
Command line: ls-t >  x wc-l

Command 1: ls-t
    Arguments:
        |wc-l|
    Standard input:  [keyboard]
    Standard output: x
----------------------------------------
Command line: java rev < a2/rev.1 | java rev > out

Command 1: java
    Arguments:
        |rev|
    Standard input:  a2/rev.1
    Standard output: [pipe]

Command 2: java
    Arguments:
        |rev|
    Standard input:  [pipe]
    Standard output: out
----------------------------------------
Command line: cb | grep -v ......................... > a1-from.txt

Command 1: cb
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: grep
    Arguments:
        |-v|
        |.........................|
    Standard input:  [pipe]
    Standard output: a1-from.txt
----------------------------------------
Command line: find | grep -v facts.txt | grep  -v eca | grep  -v video | grep  -v observations | grep -v bb.txt | grep -v readit.txt

Command 1: find
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: grep
    Arguments:
        |-v|
        |facts.txt|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: grep
    Arguments:
        |-v|
        |eca|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 4: grep
    Arguments:
        |-v|
        |video|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 5: grep
    Arguments:
        |-v|
        |observations|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 6: grep
    Arguments:
        |-v|
        |bb.txt|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 7: grep
    Arguments:
        |-v|
        |readit.txt|
    Standard input:  [pipe]
    Standard output: [screen]
----------------------------------------
Command line: find | grep   -v facts.txt |   grep -v eca   | grep -v video | grep -v observations | grep -v bb.txt | grep -v readit.txt > out

Command 1: find
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: grep
    Arguments:
        |-v|
        |facts.txt|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: grep
    Arguments:
        |-v|
        |eca|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 4: grep
    Arguments:
        |-v|
        |video|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 5: grep
    Arguments:
        |-v|
        |observations|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 6: grep
    Arguments:
        |-v|
        |bb.txt|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 7: grep
    Arguments:
        |-v|
        |readit.txt|
    Standard input:  [pipe]
    Standard output: out
----------------------------------------
Command line: cb | cut -f1 -d@ | grep -v ^$ | grep -v whm | grep -v youhao | grep -v What | tr A-Z a-z | sort -u > a1.csv

Command 1: cb
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: cut
    Arguments:
        |-f1|
        |-d@|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: grep
    Arguments:
        |-v|
        |^$|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 4: grep
    Arguments:
        |-v|
        |whm|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 5: grep
    Arguments:
        |-v|
        |youhao|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 6: grep
    Arguments:
        |-v|
        |What|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 7: tr
    Arguments:
        |A-Z|
        |a-z|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 8: sort
    Arguments:
        |-u|
    Standard input:  [pipe]
    Standard output: a1.csv
----------------------------------------
Command line: <   a   b | c

Command 1: b
    No arguments
    Standard input:  a
    Standard output: [pipe]

Command 2: c
    No arguments
    Standard input:  [pipe]
    Standard output: [screen]
----------------------------------------
Command line: cb | cut -f1 -d@ | grep -v ^$ | grep -v whm | grep -v youhao | grep -v What | tr A-Z a-z | sort | uniq -c | sort -rn | > x wc

Command 1: cb
    No arguments
    Standard input:  [keyboard]
    Standard output: [pipe]

Command 2: cut
    Arguments:
        |-f1|
        |-d@|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 3: grep
    Arguments:
        |-v|
        |^$|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 4: grep
    Arguments:
        |-v|
        |whm|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 5: grep
    Arguments:
        |-v|
        |youhao|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 6: grep
    Arguments:
        |-v|
        |What|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 7: tr
    Arguments:
        |A-Z|
        |a-z|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 8: sort
    No arguments
    Standard input:  [pipe]
    Standard output: [pipe]

Command 9: uniq
    Arguments:
        |-c|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 10: sort
    Arguments:
        |-rn|
    Standard input:  [pipe]
    Standard output: [pipe]

Command 11: wc
    No arguments
    Standard input:  [pipe]
    Standard output: x