The key to using command-line arguments is that the shell script needs to interact with the person who is running the script.The bash shell provides command-line arguments to add data values after the command, command line options to modify the
Variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of the current shell
As already mentioned, variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of
As already mentioned, variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of
As already mentioned, variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of
Shell basic exercises: using the read interactive input, command-line script 2 ways to implement input 2 integer numbers, and calculate subtraction. The basic knowledge of shell includes: variable definition, read, if Judgment statement, regular
Variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of the current shell
ShellSpecial variables: Shell $, $#, $*, [email protected], $?, $$ and command line argumentsAs already mentioned, variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special
Common shell: -------------- from "laruence's Linux private dish"
In the early UNIX era, there were many developers, so shell had many versions based on the developer's differences, such
Frequently heard Bourne shell (SH ),C shell,Commonly used
Transfer from http://c.biancheng.net/cpp/view/2739.htmlAs already mentioned, variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called
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