Sed * only modifying first file

Question

I would like to delete the first 40 lines of a good number of ASCII files and save the ASCII files without those 40 lines

I'm working under OSX High Sierra, realized that the -i option in sed was not working unless I create a backup file, so I tried using this command:

sed -i'backup' -e '1,40d' *.txt

It however only modifies and deletes the first 40 lines in my first file (alphabetically), but not the others.

How can I edit multiple files with just one command?

Thanks

Possible duplicate of [Change multiple files](https://stackoverflow.com/questions/10445934/change-multiple-files) — brunorey, Feb 19 '19 at 02:23
Won't work on OSX Sierra. See [this answer](https://stackoverflow.com/a/10764000). — brunorey, Feb 19 '19 at 02:24

score 0 · Accepted Answer · answered Feb 19 '19 at 03:18

You can use the following command that will

look in the current folder
ignore sub folder
take only into account files whose filenames end with '*.txt'
before executing the sed command.

Command:

   find . -maxdepth 1 -type f -name '*.txt' -exec sed -i 'backup' -e '1,40d' {} \;

Sed * only modifying first file

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