Find all files in the root directory (indicated by "/"), list them (ls -l /), filter out only the files (grep ^[a-zA-Z]), print the 9th column (awk '{print $9}'), and execute the command "cat" on each file (find ... -exec cat {} \;).
find $(ls -l / | grep ^[a-zA-Z] | awk '{print $9}') -exec cat {} \;