Question
In linux, while sed is not easy to use for complicated text swapping and selective trimming (by columns, for example), it is easy to use for wholesale inserting and deleting of lines by [...] or by line numbers.
simple pattern matching

Question
In linux, while sed is not easy to use for complicated text swapping and selective trimming (by columns, for example), it is easy to use for wholesale inserting and deleting of lines by [...] or by line numbers.
?

Question
In linux, while sed is not easy to use for complicated text swapping and selective trimming (by columns, for example), it is easy to use for wholesale inserting and deleting of lines by [...] or by line numbers.
simple pattern matching
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8. Streams and sed -- The Stream Editor
contains a + with nothing before it, which will cause expr to complain. To get around this, we can just add a 0 to the expression, so that it becomes 0 + .... 8.8 Inserting and Deleting Lines s<span>ed can perform a few operations that make it easy to write scripts that edit configuration files for you. For instance, sed -e '7a\ an extra line.\ another one.\ one more.' a ppends three

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