I have a collection of gzipped files that I want to combine into a single file. They each have identical format. I want to keep the header information from only the first file and skip it in the subsequent files.
As a simple example, I have four identical files with the following content:
$ gzcat file1.gz # header 1 2
I want to end up with
# header 1 2 1 2 1 2 1 2
In reality, I can have a varying number of files so I would like to be able to do this programatically. Here is the non-programatic solution I have so far...
cat <(gzcat file1.gz) <(tail -q -n +2 <(gzcat file2.gz) <(gzcat file3.gz) <(gzcat file4.gz))
This command works, but it is “hard coded” to handle four files,
and I need to generalize it for any number of files.
I am using
bash as the shell if that helps. My preference is for performance (in reality the files can be millions of lines long), so I am OK with a less-than-elegant solution if it is speedy.