sed is short for stream editor. It reads in a file (one line at a time), modifies the contents per your parameters, and then outputs.
Basics
A more simple description, it allows you to modify the contents of a file without you actually having to open it.
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sed -i 's,original/path,new/path,' notes.txt # do not need to escape '/' since we are using ',' as a separator |
Insert Multiple Lines from File with Match
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| Code Block | ||
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sed '/cdef/r muliple-lines.txt' notes.txt |
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References
Simple introduction - http://www.grymoire.com/Unix/Sed.html
Another introduction - http://lowfatlinux.com/linux-sed.html
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