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I have two files I want to cat together. However, the last line of the first file and the first line of the last file should be omitted.
I am sure this can be done in a UNIX shell (or rather, Cygwin). But how?
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The NR variable indicates the number of records in a file. The following `awk` command uses the NR variable to skip the first line of a file. The value of NR is 1 for the first line. The following command will print lines for which the NR value is greater than 1.
This operator stands for the end of the file. This means that wherever a compiler or an interpreter encounters this operator, it will receive an indication that the file it was reading has ended.
The key takeaway from this section is that we use cat > FILENAME to create or overwrite a file. Additionally, we can use cat >> FILENAME to append to a file that's already there. Then after typing in the text we want we use CTRL + D to exit the editor, return to the command line, and create the file.
$ head --lines=-1 file1 > res
$ tail --lines=+2 file2 >> res
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