shell Archives - Page 33 of 33

How to concatenate string variables in Bash

In PHP, strings are concatenated together as follows: $foo = "Hello"; $foo .= " World"; Here, $foo becomes “Hello World”. How is this ...

April 10, 2022
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How can I check if a directory exists in a Bash shell script?

What command can be used to check if a directory exists or not, within a Bash shell script? 3 36

April 9, 2022
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Meaning of $? (dollar question mark) in shell scripts

This is the exit status of the last executed command. For example the command true always returns a status of 0 and false always returns a status of 1: true ...

April 6, 2022
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How do I execute a program or call a system command?

How do I call an external command within Python as if I’d typed it in a shell or command prompt? 6 63 Use ...

April 6, 2022
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