I have the script below to subtract the counts of files between two directories but the COUNT= expression does not work. What is the correct syntax? #!/usr/bin/env bash FIRSTV=`ls...
This question already has answers here: How do I set a variable to the output of a command in Bash? (14 answers) Closed 3 years ago. I have a...
I’m using a python script as a driver for a hydrodynamics code. When it comes time to run the simulation, I use subprocess.Popen to run the code, collect the...
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I run across many shell scripts with variables in all caps, and I’ve always thought that there is a severe misunderstanding with that. My understanding is that, by convention...
I’d like to write a shell script which checks if a certain file, archived_sensor_data.json, exists, and if so, deletes it. Following http://www.cyberciti.biz/tips/find-out-if-file-exists-with-conditional-expressions.html, I’ve tried the following: [-e archived_sensor_data.json] &&...
I need to read a value from the terminal in a bash script. I would like to be able to provide a default value that the user can change....
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I need to generate a random port number between 2000-65000 from a shell script. The problem is $RANDOM is a 15-bit number, so I’m stuck! PORT=$(($RANDOM%63000+2001)) would work nicely...