# permissioin with deb
**URL:** https://discourse.cmake.org/t/permissioin-with-deb/7135
**Category:** Usage
**Tags:** os:linux
**Created:** [December 27, 2022, 8:47am UTC](https://discourse.cmake.org/t/permissioin-with-deb/7135 "2022-12-27T08:47:06Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@alice](https://discourse.cmake.org/u/alice)
#### Post date: [December 27, 2022, 8:47am UTC](https://discourse.cmake.org/t/permissioin-with-deb/7135/1 "2022-12-27T08:47:07Z")
I cpack a deb and install it with sudo dpkg -i xx.deb.
The program will be install /opt/xxx
But the /opt/xxx permission is root:root
How can I solve it?
I add some command on the postinst script. But the user is root, not my default user sam
```auto
chown -R "$USER:$USER" "/opt/xxx"
```
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [December 28, 2022, 12:42pm UTC](https://discourse.cmake.org/t/permissioin-with-deb/7135/2 "2022-12-28T12:42:09Z")
`dpkg` always installs as `root`, so any install script is going to do that. I recommend looking at Debian packaging guidelines for how to do this properly and, if not supported, get switches to control that implemented in CPack.
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### Author:  [@alice](https://discourse.cmake.org/u/alice)
#### Post date: [December 29, 2022, 2:09am UTC](https://discourse.cmake.org/t/permissioin-with-deb/7135/3 "2022-12-29T02:09:39Z")
Do you have the method to get the user name when run the postinst on deb
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### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [December 29, 2022, 2:27am UTC](https://discourse.cmake.org/t/permissioin-with-deb/7135/4 "2022-12-29T02:27:27Z")
AFAIK, the postinst user is always `root`.