Replace group permissions of certain files.

replace group permissions

# ~             find in $HOME
# fdl           file types: f = file, d = directory, l = symbolic link
# $GROUP        current group permission
# -exec         do something with found files
# :$NEWGROUP    new group permission (needs leading colon! -> chown owner:group)
# {}            placeholder for each found file
# \;            escape the semicolon that ends the -exec part of the command

find ~ -type fdl -group $GROUP -print -exec chown :$NEWGROUP {} \;