$ s='one_two_three_four_five'
$ A="$(cut -d'_' -f2 <<<"$s")"
$ echo "$A"
two
$ B="$(cut -d'_' -f4 <<<"$s")"
$ echo "$B"
four

Split command in Linux is used to split large files into smaller files.
It splits the files into 1000 lines per file(by default) and even allows users to change
the number of lines as per requirement.
The names of the files are PREFIXaa, PREFIXab, PREFIXac, and so on.
By default the PREFIX of files name is x and the default size of each
split file is 1000 lines per file and both the parameters can be changed with ease.
It is generally used with log and archive files as they are very large
and have a lot of lines, So in order to break them into small files for analysis
split command is used.
Syntax:
split [options] name_of_file prefix_for_new_files

cat x* > myImage.iso