In bash, you can't nest backticks, but you can nest the newer, more flexible "$()" construct:

echo "$( command arg arg '$( nested_command arg arg )' )"
--
Tommy
$ perl -MMIME::Base64 -e 'print decode_base64 "YWNlQHRvbW15YnV0bGVyLm1lCg=="'

In reply to Re^5: backticks and quotation trouble in bash by Tommy
in thread backticks and quotation trouble in bash by floobit

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