Please provide specific examples of the input file contents and desired output file content.

BTW, you can append mutiple files on *nix using cat(1). For example,

    cat file1 file2 file3 > file.out
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If you just want to remove all instances of a specific delimiter character from the file (assuming no escapes or quoting), you could use something like the following to do it in place. This example assumes that your deliminter is a comma (,). Replace that with your character you want to remove.

    perl -pi.bak 's/,//g' file.out
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-- Eric Hammond