---
syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# update-ca-certificates

> Update the CA certificates bundle and regenerate `/etc/ssl/certs`.
> More information: <https://manned.org/update-ca-certificates>.

- Update certificates:

`sudo update-ca-certificates`

- Update certificates in verbose mode:

`sudo update-ca-certificates {{[-v|--verbose]}}`

- Perform a fresh update (remove all symlinks and regenerate):

`sudo update-ca-certificates {{[-f|--fresh]}}`

- Add a custom certificate (copy it first, then update):

`sudo cp {{path/to/certificate.crt}} /usr/local/share/ca-certificates/ && sudo update-ca-certificates`