-R
to recurse, or explicitly a-r
to remove
read permissions.chmod -r 0700 dir
chmod -r file
chmod -R 0700 dir
chmod a-r file
Many tools use -r
for recursive operation, but in
chmod
this removes read permissions.
If you wanted to change permissions recursively, change the flag to
-R
. If you wanted to remove read permissions, consider
using a-r
explicitly to make this more obvious.
If you're using it correctly and don't mind the potential for confusion, you can save a single character by ignoring this warning.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.