vault/website/content/docs/commands/pki/index.mdx
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---
layout: docs
page_title: pki - Command
description: |-
The "pki" command groups subcommands for interacting with Vault's PKI
secrets engine.
---
# pki
The `pki` command groups subcommands for interacting with Vault's
[PKI Secrets Engine](/vault/docs/secrets/pki).
## Syntax
Option flags for a given subcommand are provided after the subcommand, but before the arguments.
## Example health check
To [health check](/vault/docs/commands/pki/health-check) a mount, use the
`vault pki health-check <mount>` command:
```
$ vault pki health-check pki
ca_validity_period
------------------
status endpoint message
------ -------- -------
ok /pki/issuer/da41ffb1-cc6d-5a5c-f147-e4d7beeb1b73 Issuer's validity (2032-12-17) is OK
... more output elided ...
```
## Example verify sign
To [verify](/vault/docs/commands/pki/verify-sign) the signature between two
issuer certificates, use the `vault pki verify-sign <parent> <child>` command:
```shell-session
$ vault pki verify-sign pki_root/issuer/root pki_int/issuer/FirstDepartment
issuer:pki_root/issuer/root
issued:pki_int/issuer/FirstDepartment
field value
----- -----
subject_match true
path_match true
trust_match true
key_id_match true
signature_match true
```
## Example list child issuers
To [list intermediate](/vault/docs/commands/pki/list-intermediates) certificates
potentially issued by a certificate inside vault, use the
`vault pki list-intermediates <parent>` command:
```shell-session
$ vault pki list-intermediates /pki_root/issuer/default
intermediate match?
------------ ------
pki_int_2/issuer/d4404ccc-3ad4-83a9-f5df-398637654b3b true
pki_int_2/issuer/db0b0a6c-6641-ac15-363a-4e5261315581 true
pki_root/issuer/9464c4fe-e8a6-d96a-0566-021575e7382c true
pki_int/issuer/2f958ec5-1838-336e-331b-07032379b958 true
pki_int/issuer/b8cc0b41-e0e9-1a92-12c4-6849c9d6f837 true
```
## Example issue
To [issue](/vault/docs/commands/pki/issue) a new issuer certificate, use the
`vault pki issue <parent-certificate-path> <mount>` command:
```shell-session
$ vault pki issue -issuer_name="FirstDepartment" /pki_root/issuer/default /pki_int/ common_name="first-department.example.com"
Key Value
--- -----
ca_chain [-----BEGIN CERTIFICATE-----
MIIDsDCCApigAwIBAgIULEPuHTW7UDtAQg+qcc18osNWgZIwDQYJKoZIhvcNAQEL...
```
## Example reissue
To [reissue](/vault/docs/commands/pki/reissue) an issuer certificate, using the
same fields as an existing issuer template, use the
`vault pki reissue <parent-certificate-path> <template> <mount>` command:
```shell-session
$ vault pki reissue -issuer_name="SecondDepartment" /pki_root/issuer/default /pki_int/issuer/FirstDepartment /pki_int_2/ common_name="second-department.example.com"
Key Value
--- -----
ca_chain [-----BEGIN CERTIFICATE-----
MIID0DCCArigAwIBAgIUdfRe05B5eRXsg3pvsJ/g94eYuWkwDQYJKoZIhvcNAQEL```