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Reserved words in bash.

This words are recognized as reserved when:

• unquoted
• and
  • either the first word of a simple command
  • or the third word of a case or for command.

Articles Related

List

• ! : logical negation
• case
• do
• done
• elif
• else
• esac
• fi
• for
• function
• if
• in
• select
• then
• until
• while
• {
• }
• time
• [[
• ]]