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lang-bash
-ainstead of&&, so one can write:[ -L $file -a -f $file ], which is the same number of characters within the brackets without the extra[and]...-aand-oare problematic because they can lead to incorrect parses if some of the operands involved look like operators. That's why I don't mention them: they have zero advantage and don't always work. And never write unquoted variable expansions without a good reason:[[ -L $file -a -f $file ]]is fine but with single brackets you need[ -L "$file" -a -f "$file" ](which is ok e.g. if$filealways starts with/or./).[[ -L $file && -f $file ]](no-awith the[[...]]variant).{ task1 && task2 && task3 && echo "Success!"; } || { echo "One of the tasks failed!"; exit 1; }in a larger script. If you use parentheses,exit 1will just exit out of a subshell and any surrounding script will keep running. Without the ending semicolon in each set of braces, you'll get "Unexpected end of file".