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Use AWS CLI to query AWS CloudWatch Logs and determine the most recent entry into a Log Group
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| aws logs describe-log-groups | jq ".logGroups[].logGroupName" | grep -E "homeplus|mcdonalds" | xargs -n 1 -t aws logs describe-log-streams --query "logStreams[*].lastEventTimestamp" --log-group | jq "max/1000|floor" | xargs -t -n 1 date -r | |
| # aws logs describe-log-groups | jq ".logGroups[].logGroupName" | |
| # Get LogGroup names | |
| # grep -E "homeplus|mcdonalds" | |
| # (Optional) Filter LogGroup names | |
| # xargs -n 1 -t aws logs describe-log-streams --query "logStreams[*].lastEventTimestamp" --log-group | jq "max/1000|floor" | |
| # Get last event timestamp for each LogGroup. | |
| # (Optional) Convert milliseconds timestamp to seconds timestamp. | |
| # xargs -t -n 1 date -r | |
| # (MacOS X) Format seconds timestamp into human-readable format. | |
| # (Other) Change `date -r` to `date -d` or other option appropriate to the installation of `date` included with your OS |
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