I am using SH shell and I am trying to compare a string with a variable’s value but the if condition is always execute to true. Why? Here is some code: Sourcesystem=”ABC” if [ “$Sourcesystem” -eq ‘XYZ’ ]; then echo “Sourcesystem Matched” else echo “Sourcesystem is NOT Matched $Sourcesystem” fi; echo Sourcesystem Value is $Sourcesystem … Read more
I’m running Firefox on a Xvfb in a VPS. What I want to do is to take a full page screenshot of the page. I can redirect Firefox to particular page using firefox http://google.com and take a screenshot (inside X) using ImageMagick import root -window output.jpg The problem is, most of the page need scrolling … Read more
I am looking for a way to clean up the mess when my top-level script exits. Especially if I want to use set -e, I wish the background process would die when the script exits. 13 Answers 13
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 5 months ago. The community reviewed whether to reopen this question 5 months ago and left it closed: Original close reason(s) were not resolved Improve … Read more
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] && rm archived_sensor_data.json However, this throws an error [-e: command not found when I try to run the resulting test_controller script using the ./test_controller command. What is … Read more
What does echo $? mean in shell programming? 8 Answers 8
I use curl to get http headers to find http status code and also return response. I get the http headers with the command curl -I http://localhost To get the response, I use the command curl http://localhost As soon as use the -I flag, I get only the headers and the response is no longer … Read more
What’s an easy way to read random line from a file in a shell script? 13 Answers 13
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question Can anyone explain what are the uses of the exec command in shell scripting with … Read more
I am working on some stuff where I am storing data in a file. But each time I run the script it gets appended to the previous file. I want help on how I can remove the file if it already exists. 7 Answers 7
