Shell script style
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Scripts should follow the style produced by shfmt(1) utilising the -ci and -s options. That is

 - tab indented
 
 - case indented
 
 - ';' rather than a newline between conditional test and 'then'

 - no space before redirection operators

In addition:-

 - wrap at 80 columns

 - prefer '[ ]' to test(1) or test builtin

 - avoid obsolete [ x"$VARIABLE" = x"value" ]

 - consider using init-d-script(5)
