# Let's first create a directory and look at its default
# permissions.

mkdir dir
touch dir/file.txt
ls -ld dir
echo

set -x # print what is going on

# Then remove all the ‘execute’ bits:

chmod 644 dir
cd dir # permission error
ls dir # ok
echo

# Let's now try with «only» the execute bits:

chmod 111 dir
cd dir # ok
ls # not ok
cd ..
echo

# How about ‹r-x------›? i.e. deny writing to ourselves

chmod 500 dir
rm dir/file.txt # not ok
echo

# Go back to where we started and clean up.

chmod 755 dir
rm dir/file.txt
rmdir dir

# Next up: ‹umask.sh›.