摘要： Chapter 7 Input/Output and Command-Line Processing I/O Redirectors The redirector <> is mainly meant for use with device files (in the /dev directory) 阅读全文

摘要： Arithmetic Conditionals Operator Meaning -lt Less than -gt Greater than -le Less than or equal to -ge Greater than or equal to -eq Equal to -ne Not eq 阅读全文

摘要： Typed Variables You can set variable attributes with the declare built-in. * Table 6-1 summarizes the available options with declare. Option Meaning - 阅读全文