How To Install oidentd on CentOS 8

oidentd is RFC 1413-compliant identification server with NAT support

Introduction

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

What is oidentd

The oidentd package contains identd, which implements the RFC 1413 identification server. Identd looks up specific TCP/IP connections and returns either the user name or other information about the process that owns the connection. Install oidentd if you need to look up information about specific TCP/IP connections.

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

Install oidentd 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 oidentd using dnf by running the following command:

sudo dnf -y install oidentd

Install oidentd 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 oidentd using yum by running the following command:

sudo yum -y install oidentd

How To Uninstall oidentd on CentOS 8

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

sudo dnf remove oidentd

oidentd Package Contents on CentOS 8

/etc/oidentd.conf
/etc/oidentd_masq.conf
/etc/sysconfig/oidentd
/usr/lib/.build-id
/usr/lib/.build-id/5c
/usr/lib/.build-id/5c/98a3a481a85776f910ea89f77948d965748c1f
/usr/lib/systemd/system/oidentd.service
/usr/lib/systemd/system/oidentd.socket
/usr/lib/systemd/system/[email protected]
/usr/sbin/oidentd
/usr/share/doc/oidentd
/usr/share/doc/oidentd/AUTHORS
/usr/share/doc/oidentd/ChangeLog
/usr/share/doc/oidentd/KERNEL_SUPPORT.md
/usr/share/doc/oidentd/NEWS
/usr/share/doc/oidentd/README
/usr/share/doc/oidentd/book
/usr/share/doc/oidentd/book/_index.md
/usr/share/doc/oidentd/book/getting-started
/usr/share/doc/oidentd/book/getting-started/_index.md
/usr/share/doc/oidentd/book/getting-started/capabilities.md
/usr/share/doc/oidentd/book/getting-started/configuration
/usr/share/doc/oidentd/book/getting-started/configuration/_index.md
/usr/share/doc/oidentd/book/getting-started/configuration/examples.md
/usr/share/doc/oidentd/book/getting-started/installation.md
/usr/share/doc/oidentd/book/getting-started/starting-the-server.md
/usr/share/doc/oidentd/book/getting-started/support.md
/usr/share/doc/oidentd/book/guides
/usr/share/doc/oidentd/book/guides/_index.md
/usr/share/doc/oidentd/book/guides/using-oidentd-with-quassel.md
/usr/share/doc/oidentd/book/guides/using-oidentd-with-znc.md
/usr/share/doc/oidentd/book/nat
/usr/share/doc/oidentd/book/nat/_index.md
/usr/share/doc/oidentd/book/nat/forwarding.md
/usr/share/doc/oidentd/book/nat/introduction.md
/usr/share/doc/oidentd/book/nat/static-replies.md
/usr/share/doc/oidentd/book/security
/usr/share/doc/oidentd/book/security/_index.md
/usr/share/doc/oidentd/book/security/dropping-privileges.md
/usr/share/doc/oidentd/book/security/hiding-connections.md
/usr/share/doc/oidentd/book/security/identification-vs-authentication.md
/usr/share/licenses/oidentd
/usr/share/licenses/oidentd/COPYING
/usr/share/licenses/oidentd/COPYING.DOC
/usr/share/man/man5/oidentd.conf.5.gz
/usr/share/man/man5/oidentd_masq.conf.5.gz
/usr/share/man/man8/oidentd.8.gz

References

Summary

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