in-place-file-edit

In-place File Edit

This recipe shows how we can edit the content of a file eg. change a line, remove a line, etc. This is useful for dynamically changing the content of a file.

Notes

BSD sed vs GNU sed

This recipe uses the sed command to edit a file in place. There are 2 versions of sed: BSD and GNU. MacOS uses the BSD version of sed, while Linux uses the GNU version.

ANSI-C Quoting

In the recipe we use ANSI-C quote $'\n' to represent a newline character \n in the insertion of text before and after a matching line.

References

Differences between GNU sed and BSD/MacOS sed