practice.sh

mkdir main-folder && mkdir main-folder/sub-folder{1..700} && cd main-folder && touch sub-folder647/fileX sub-folder381/fileX  sub-folder652/fileX sub-folder154/fileX && truncate -s 5K sub-folder141/smallfile141 sub-folder188/smallfile188 sub-folder454/smallfile454 sub-folder555/smallfile555 && truncate -s 50K sub-folder53/bigfile53 sub-folder22/bigfile22 sub-folder258/bigfile258 && touch sub-folder450/pass1 sub-folder699/pass2 sub-folder308/pass3 sub-folder333/pass4