You can use basename even though it's not a file. Strip off the file name using dirname, then use basename to get the last element of the string:
basename
dirname
dir="/from/here/to/there.txt"dir="$(dirname $dir)" # Returns "/from/here/to"dir="$(basename $dir)" # Returns just "to"
The opposite of dirname is basename:
basename "$(dirname "/from/here/to/there.txt")"
Using bash string functions:
bash
$ s="/from/here/to/there.txt"$ s="${s%/*}" && echo "${s##*/}"to