How To Install nss_wrapper on Rocky Linux 8

In this tutorial we learn how to install nss_wrapper on Rocky Linux 8. nss_wrapper is A wrapper for the user, group and hosts NSS API

Introduction

In this tutorial we learn how to install nss_wrapper on Rocky Linux 8.

What is `nss_wrapper`

There are projects which provide daemons needing to be able to create, modify and delete Unix users. Or just switch user ids to interact with the system e.g. a user space file server. To be able to test that you need the privilege to modify the passwd and groups file. With nss_wrapper it is possible to define your own passwd and groups file which will be used by software to act correctly while under test. If you have a client and server under test they normally use functions to resolve network names to addresses (dns) or vice versa. The nss_wrappers allow you to create a hosts file to setup name resolution for the addresses you use with socket_wrapper. To use it set the following environment variables LD_PRELOAD=libuid_wrapper.so NSS_WRAPPER_PASSWD=/path/to/passwd NSS_WRAPPER_GROUP=/path/to/group NSS_WRAPPER_HOSTS=/path/to/host This package doesn’t have a devel package cause this project is for development/testing.

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

Install nss_wrapper on Rocky Linux 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

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

sudo dnf -y install nss_wrapper

Install nss_wrapper on Rocky Linux 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

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

sudo yum -y install nss_wrapper

How To Uninstall nss_wrapper on Rocky Linux 8

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

sudo dnf remove nss_wrapper

nss_wrapper Package Contents on Rocky Linux 8

/usr/bin/nss_wrapper.pl
/usr/lib/.build-id
/usr/lib/.build-id/be
/usr/lib/.build-id/be/bd42a34d8e3c4df3662aba7d3615514e00da2c
/usr/lib64/cmake/nss_wrapper
/usr/lib64/cmake/nss_wrapper/nss_wrapper-config-version.cmake
/usr/lib64/cmake/nss_wrapper/nss_wrapper-config.cmake
/usr/lib64/libnss_wrapper.so
/usr/lib64/libnss_wrapper.so.0
/usr/lib64/libnss_wrapper.so.0.2.5
/usr/lib64/pkgconfig/nss_wrapper.pc
/usr/share/doc/nss_wrapper
/usr/share/doc/nss_wrapper/AUTHORS
/usr/share/doc/nss_wrapper/ChangeLog
/usr/share/doc/nss_wrapper/README
/usr/share/licenses/nss_wrapper
/usr/share/licenses/nss_wrapper/LICENSE
/usr/share/man/man1/nss_wrapper.1.gz
/usr/bin/nss_wrapper.pl
/usr/lib/.build-id
/usr/lib/.build-id/fb
/usr/lib/.build-id/fb/b0a82f366b0ad49cfa45ceb2e108bd9c48b62c
/usr/lib/cmake/nss_wrapper
/usr/lib/cmake/nss_wrapper/nss_wrapper-config-version.cmake
/usr/lib/cmake/nss_wrapper/nss_wrapper-config.cmake
/usr/lib/libnss_wrapper.so
/usr/lib/libnss_wrapper.so.0
/usr/lib/libnss_wrapper.so.0.2.5
/usr/lib/pkgconfig/nss_wrapper.pc
/usr/share/doc/nss_wrapper
/usr/share/doc/nss_wrapper/AUTHORS
/usr/share/doc/nss_wrapper/ChangeLog
/usr/share/doc/nss_wrapper/README
/usr/share/licenses/nss_wrapper
/usr/share/licenses/nss_wrapper/LICENSE
/usr/share/man/man1/nss_wrapper.1.gz

References

nss_wrapper website

Summary

In this tutorial we learn how to install nss_wrapper on Rocky Linux 8 using yum and dnf.