How To Install uid_wrapper on CentOS 8

uid_wrapper is A wrapper for privilege separation A wrapper for privilege separation

Introduction

In this tutorial we learn how to install uid_wrapper on CentOS 8.

What is uid_wrapper

Some projects like a file server need privilege separation to be able to switch to the connection user and do file operations. uid_wrapper convincingly lies to the application letting it believe it is operating as root and even switching between UIDs and GIDs as needed. To use it set the following environment variables LD_PRELOAD=libuid_wrapper.so UID_WRAPPER=1 This package doesn’t have a devel package cause this project is for development/testing. uid_wrapper 1.2.4 4.el8 x86_64 41 k uid_wrapper-1.2.4-4.el8.src.rpm powertools A wrapper for privilege separation http GPLv3+ Some projects like a file server need privilege separation to be able to switch to the connection user and do file operations. uid_wrapper convincingly lies to the application letting it believe it is operating as root and even switching between UIDs and GIDs as needed. To use it set the following environment variables LD_PRELOAD=libuid_wrapper.so UID_WRAPPER=1 This package doesn’t have a devel package cause this project is for development/testing.

We can use yum or dnf to install uid_wrapper on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install uid_wrapper.

Install uid_wrapper on CentOS 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install uid_wrapper using dnf by running the following command:

sudo dnf -y install uid_wrapper

Install uid_wrapper on CentOS 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install uid_wrapper using yum by running the following command:

sudo yum -y install uid_wrapper

How To Uninstall uid_wrapper on CentOS 8

To uninstall only the uid_wrapper package we can use the following command:

sudo dnf remove uid_wrapper

uid_wrapper Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/84
/usr/lib/.build-id/84/9ec27a2464ccd1c3c7a6715ea78d543acf691b
/usr/lib/cmake
/usr/lib/cmake/uid_wrapper
/usr/lib/cmake/uid_wrapper/uid_wrapper-config-version.cmake
/usr/lib/cmake/uid_wrapper/uid_wrapper-config.cmake
/usr/lib/libuid_wrapper.so
/usr/lib/libuid_wrapper.so.0
/usr/lib/libuid_wrapper.so.0.0.6
/usr/lib/pkgconfig
/usr/lib/pkgconfig/uid_wrapper.pc
/usr/share/doc/uid_wrapper
/usr/share/doc/uid_wrapper/AUTHORS
/usr/share/doc/uid_wrapper/COPYING
/usr/share/doc/uid_wrapper/ChangeLog
/usr/share/doc/uid_wrapper/README
/usr/share/man/man1/uid_wrapper.1.gz
/usr/lib/.build-id
/usr/lib/.build-id/d1
/usr/lib/.build-id/d1/978e77b3d5c543b9f6dcdef4cc4d9a8f068b08
/usr/lib64/cmake
/usr/lib64/cmake/uid_wrapper
/usr/lib64/cmake/uid_wrapper/uid_wrapper-config-version.cmake
/usr/lib64/cmake/uid_wrapper/uid_wrapper-config.cmake
/usr/lib64/libuid_wrapper.so
/usr/lib64/libuid_wrapper.so.0
/usr/lib64/libuid_wrapper.so.0.0.6
/usr/lib64/pkgconfig
/usr/lib64/pkgconfig/uid_wrapper.pc
/usr/share/doc/uid_wrapper
/usr/share/doc/uid_wrapper/AUTHORS
/usr/share/doc/uid_wrapper/COPYING
/usr/share/doc/uid_wrapper/ChangeLog
/usr/share/doc/uid_wrapper/README
/usr/share/man/man1/uid_wrapper.1.gz

References

Summary

In this tutorial we learn how to install uid_wrapper on CentOS 8 using yum and dnf.