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Question
In linux, running the command: du -h test.sh , for example, produces the following output:
4.0K test.h
Run a command from the shell such that the above output is printed in reverse, i.e. :
test.h 4.0K
** note: in du output is seperated by tabs (so use \t in your regex not spaces)
Answer
du -h test.sh | sed -e 's/\(\<.*\>\)\(\t*\)\(\<.*\>\)/\3 \1/g'
^^ note: the use of chuncking the regex in to 3 regex subexpressions via the backslash-paranthesis syntax
^^ note: the use of the \<\> syntax to signify whole words
^^ note the use of \3 \1 in the replacement clause to do the actual swapping.

Question
In linux, running the command: du -h test.sh , for example, produces the following output:
4.0K test.h
Run a command from the shell such that the above output is printed in reverse, i.e. :
test.h 4.0K
** note: in du output is seperated by tabs (so use \t in your regex not spaces)
Answer
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Question
In linux, running the command: du -h test.sh , for example, produces the following output:
4.0K test.h
Run a command from the shell such that the above output is printed in reverse, i.e. :
test.h 4.0K
** note: in du output is seperated by tabs (so use \t in your regex not spaces)
Answer
du -h test.sh | sed -e 's/\(\<.*\>\)\(\t*\)\(\<.*\>\)/\3 \1/g'
^^ note: the use of chuncking the regex in to 3 regex subexpressions via the backslash-paranthesis syntax
^^ note: the use of the \<\> syntax to signify whole words
^^ note the use of \3 \1 in the replacement clause to do the actual swapping.
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8. Streams and sed -- The Stream Editor
't yet figured it out, we are trying to get that column of byte sizes into a format like + 438 + 1525 + 76 + 92146 so that expr can understand it. Hence, we replace each line with subexpression <span>\2 and a leading + sign. Backquotes give the output of this to expr , which studiously sums them, ignoring any newline characters as though the summation were typed in on a single line. There is one minor

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