$ btwn --help
btwn - command line range filter tool

Filters lines based on the given range expression.

Examples:

'3'       - line 3 only
'2..6'    - lines 2 to 6 exclusive
'2..=6'   - lines 2 to 6 inclusive
'3..'     - lines 3 onwards
'..4'     - lines 1 to 4 exclusive

USAGE:
    btwn [OPTIONS] <range>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

OPTIONS:
    -i, --input <FILE>    Input file (defaults to stdin)

ARGS:
    <range>    A range filter expression, e.g. '1..5'

$ cargo install btwn

cargo install --path .

$ cat test.txt
a
b
c
d
e

$ cat test.txt | btwn 2..5
b
c
d

$ cat test.txt | btwn 2..=5
b
c
d
e

$ cat test.txt | btwn 2..
b
c
d
e

$ cat test.txt | btwn ..=4
a
b
c
d