I try to replace a certain substring from the stdin with a new substring. I have to get the stdin from the pipe, after reading several files by cat. Then I want to push the changed string forward to the pipe.
Here is what I try to do:
cat file1 file2 | echo ${#(cat)/@path_to_file/'path//to//file'} | ... | ... | ... | ...
I try to replace the substring @path_to_file with the replacement substring 'path/to/file' (the surrounding quotes are part of the replacement substring).
However bash gives me an error message: bad substitution
Any ideas how I could accomplish this?
You can use the command sed.
cat file1 file2 | sed -e 's/@path_to_file/path/to/file/' ...
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