Я просто оставлю это здесь. Пусть полежит.
$ paste --help
Usage: paste [OPTION]... [FILE]...
Write lines consisting of the sequentially corresponding lines from
each FILE, separated by TABs, to standard output.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-d, --delimiters=LIST reuse characters from LIST instead of TABs
-s, --serial paste one file at a time instead of in parallel
-z, --zero-terminated line delimiter is NUL, not newline
--help display this help and exit
--version output version information and exit