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ETCDCTL_README: clarify the usage of ETCDCTL_* variables #11138

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Sep 10, 2019
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ETCDCTL_README: clarify the usage of ETCDCTL_* variables #11138

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2 changes: 1 addition & 1 deletion etcdctl/README.md
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Expand Up @@ -16,7 +16,7 @@ ETCDCTL_CERT=/tmp/cert.pem
ETCDCTL_KEY=/tmp/key.pem
```

Prefix flag strings with `ETCDCTL_`, convert all letters to upper-case, and replace dash(`-`) with underscore(`_`).
Prefix flag strings with `ETCDCTL_`, convert all letters to upper-case, and replace dash(`-`) with underscore(`_`). Note that the environment variables with the prefix `ETCDCTL_` can only be used with the etcdctl global flags. Also, the environment variable `ETCDCTL_API` is a special case variable for etcdctl internal use only.

## Key-value commands

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