How should I glob for all hidden files?

 GLOBIGNORE=".:.."

to hide the . and .. directories. This also sets the dotglob option: * matches both hidden and non-hidden files.

You can also do

shopt -s dotglob

Gilles :)

You can use the following extglob pattern:

.@(!(.|))

. matches a literal . at first
@() is a extglob pattern, will match one of the patterns inside, as we have only one pattern inside it, it will pick that
!(.|) is another extglob pattern (nested), which matches any file with no or one .; As we have matched . at start already, this whole pattern will match all files starting with . except . and ...

extglob is enabled on interactive sessions of bash by default in Ubuntu. If not, enable it first:

shopt -s extglob

Example:

$ echo .@(!(.|))
.bar .foo .spam

You can use a find command here. For example something like

find -type f -name ".*" -exec chmod 775 {} \;

This will find hidden files and change permissions

Edit to include the comment by @gerrit:

find -type f -maxdepth 1 -name ".*" -exec chmod 775 {} \;

This will limit the search top the current directory instead of searching recursively.

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