3 Practical Examples of Using Bash While and Until Loops
Ex: curling a site's HTTP status code response, monitoring a process & waiting for an S3 bucket.
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Timestamps:
0:00 -- What we're going to cover in this video
0:19 -- Using curl to get the HTTP status code of a response
1:30 -- Executing the curl command every 100ms in a while loop
2:27 -- Alternatively we can use while true and run commands in the loop
2:54 -- Using pgrep to see if unattended-upgrade is finished running
5:19 -- Using a while loop and pgrep to see if a process is done running
6:23 -- Using an until loop to check if an S3 bucket was created
8:44 -- wait-until is a generic version of an until loop with a timeout
9:35 -- Refactoring the S3 until loop to use the wait-until script
10:24 -- Recap
Code snippets:
https://nickjanetakis.com/blog/3-prac...
Reference links:
https://github.com/nickjj/wait-until
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Personal Website: https://nickjanetakis.com
Twitter: / nickjanetakis
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