shell Archives - Page 30 of 33

Defining a variable with or without export

What is export for? What is the difference between: export name=value and name=value 14 s 14 export makes the variable available to sub-processes. ...

April 14, 2022
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How to echo shell commands as they are executed

In a shell script, how do I echo all shell commands called and expand any variable names? For example, given the following line: ...

April 14, 2022
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How to reload .bash_profile from the command line?

How can I reload .bash_profile from the command line? I can get the shell to recognize changes to .bash_profile by exiting and logging ...

April 14, 2022
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Replace one substring for another string in shell script

I have “I love Suzi and Marry” and I want to change “Suzi” to “Sara”. #!/bin/bash firstString="I love Suzi and Marry" secondString="Sara" # ...

April 14, 2022
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How to call shell commands from Ruby

How do I call shell commands from inside of a Ruby program? How do I then get output from these commands back into ...

April 14, 2022
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Running shell command and capturing the output

I want to write a function that will execute a shell command and return its output as a string, no matter, is it ...

April 14, 2022
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Why do people write #!/usr/bin/env python on the first line of a Python script?

I see this at the top of Python files: For Python 2 files #!/usr/bin/env python For Python 3 files #!/usr/bin/env python3 It seems ...

April 14, 2022
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How can I declare and use Boolean variables in a shell script?

I tried to declare a Boolean variable in a shell script using the following syntax: variable=$false variable=$true Is this correct? Also, if I ...

April 13, 2022
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YYYY-MM-DD format date in shell script

I tried using $(date) in my bash shell script, however, I want the date in YYYY-MM-DD format. How do I get this? 1 ...

April 13, 2022
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How to use SSH to run a local shell script on a remote machine?

I have to run a local shell script (windows/Linux) on a remote machine. I have SSH configured on both machine A and B. ...

April 13, 2022
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