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The problem: Automations sometimes need to store the state of several entities at once and then restore all of them at a later point in time. An example of this is: When I open my balcony door at night, I want the lights in my room to turn off. when I close the balcony door, I want the lights to be restored to the exact same state they were previously.

Sometimes you need to upgrade a server, but you also need to prevent apt from upgrading a specific package (eg. your node.js version). Many package-managers support this scenario under names like “version pinning” or “package holding”. This is how you prevent apt from upgrading a single package: Dependencies Ubuntu 12.04 or newer apt Pin a package to prevent it from being upgraded sudo apt-mark hold $PACKAGE_NAME Unpin a package to allow it being upgraded again sudo apt-mark unhold $PACKAGE_NAME

Dependencies node.js and npm (obviously) jq xargs (may needs to be installed manually) Update all dependencies to their latest version: cat package.json | \ jq -r '.dependencies | keys[]' | \ xargs -I {} npm i -S {}@latest Update all devDependencies to their latest version: cat package.json | \ jq -r '.devDependencies | keys[]' | \ xargs -I {} npm i -S {}@latest Alias the commands for easier reuse To reuse the commands without having to remember them just put them into your .

Today I learned how to count git commits in a repository by author name: git shortlog -s -n --all --no-merges Explanation: git shortlog: summarize git log output -s: only count commits -n: sort by commit number instead of author name --all: count commits in all branches --no-merges: exclude merge commits If you want to include author emails add -e Sources: https://git-scm.com/docs/git-shortlog https://git-scm.com/docs/git-log

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