DockerCLI/docs/reference/commandline/trust_signer_remove.md

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# trust signer remove
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Remove a signer
### Options
| Name | Type | Default | Description |
|:----------------|:-------|:--------|:----------------------------------------------------------------------|
| `-f`, `--force` | `bool` | | Do not prompt for confirmation before removing the most recent signer |
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## Description
`docker trust signer remove` removes signers from signed repositories.
## Examples
### Remove a signer from a repository
To remove an existing signer, `alice`, from this repository:
```console
$ docker trust inspect --pretty example/trust-demo
No signatures for example/trust-demo
List of signers and their keys:
SIGNER KEYS
alice 05e87edcaecb
bob 5600f5ab76a2
Administrative keys for example/trust-demo:
Repository Key: ecc457614c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
Remove `alice` with `docker trust signer remove`:
```console
$ docker trust signer remove alice example/trust-demo
Removing signer "alice" from image example/trust-demo...
Enter passphrase for repository key with ID 642692c:
Successfully removed alice from example/trust-demo
```
`docker trust inspect --pretty` now doesn't list `alice` as a valid signer:
```console
$ docker trust inspect --pretty example/trust-demo
No signatures for example/trust-demo
List of signers and their keys:
SIGNER KEYS
bob 5600f5ab76a2
Administrative keys for example/trust-demo:
Repository Key: ecc457614c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
### Remove a signer from multiple repositories
To remove an existing signer, `alice`, from multiple repositories:
```console
$ docker trust inspect --pretty example/trust-demo
SIGNED TAG DIGEST SIGNERS
v1 74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4 alice, bob
List of signers and their keys:
SIGNER KEYS
alice 05e87edcaecb
bob 5600f5ab76a2
Administrative keys for example/trust-demo:
Repository Key: 95b9e5514c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
```console
$ docker trust inspect --pretty example/trust-demo2
SIGNED TAG DIGEST SIGNERS
v1 74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4 alice, bob
List of signers and their keys:
SIGNER KEYS
alice 05e87edcaecb
bob 5600f5ab76a2
Administrative keys for example/trust-demo2:
Repository Key: ece554f14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4553d2ab20a8d9268
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
Remove `alice` from both images with a single `docker trust signer remove` command:
```console
$ docker trust signer remove alice example/trust-demo example/trust-demo2
Removing signer "alice" from image example/trust-demo...
Enter passphrase for repository key with ID 95b9e55:
Successfully removed alice from example/trust-demo
Removing signer "alice" from image example/trust-demo2...
Enter passphrase for repository key with ID ece554f:
Successfully removed alice from example/trust-demo2
```
Run `docker trust inspect --pretty` to confirm that `alice` is no longer listed as a valid
signer of either `example/trust-demo` or `example/trust-demo2`:
```console
$ docker trust inspect --pretty example/trust-demo
SIGNED TAG DIGEST SIGNERS
v1 74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4 bob
List of signers and their keys:
SIGNER KEYS
bob 5600f5ab76a2
Administrative keys for example/trust-demo:
Repository Key: ecc457614c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
```console
$ docker trust inspect --pretty example/trust-demo2
SIGNED TAG DIGEST SIGNERS
v1 74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4 bob
List of signers and their keys:
SIGNER KEYS
bob 5600f5ab76a2
Administrative keys for example/trust-demo2:
Repository Key: ece554f14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4553d2ab20a8d9268
Root Key: 3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
```
`docker trust signer remove` removes signers to repositories on a best effort basis.
It continues to remove the signer from subsequent repositories if one attempt fails:
```console
$ docker trust signer remove alice example/unauthorized example/authorized
Removing signer "alice" from image example/unauthorized...
No signer alice for image example/unauthorized
Removing signer "alice" from image example/authorized...
Enter passphrase for repository key with ID c6772a0:
Successfully removed alice from example/authorized
Error removing signer from: example/unauthorized
```