Git Configuration Commands
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.Listing and editing git configuration
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git config -l           <1>
git config -l --global  <1>
git config -l --system  <1>

git config user.name "John Doe"           <2>
git config --global user.name "John Doe"  <2>
git config --system user.name "John Doe"  <2>

git config -e           <3>
git config -e --global  <3>
git config -e --system  <3>
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<1> List configuration options: overlayed, user global or system wide
<2> Set an option for: current repository, user global or system wide
<3> Open the config file for: current repository, user global or system
wide in the default editor