Unable to install cntlm on Red Hat Enterprise Linux 9 due to the absence of chkconfig

I am trying to set up proxies on my Red Hat Enterprise Linux 9. I am trying to install CNTLM proxy authentication software. I downloaded the RPM file from the official repo and tried the following command: sudo rpm -Uvh cntlm-0.92.3-1.x86_64.rpm However, I get error: Failed dependencies: /sbin/chkconfig is needed by cntlm-0.92.3-1.x86_64 To try to fix this, I used the following command: sudo dnf install chkconfig This had the following output: Updating Subscription Management repositories. Icinga RH9 3.7 kB/s | 2.0 kB 00:00 rh9-bosch 3.7 kB/s | 2.0 kB 00:00 Dependencies resolved. ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: chkconfig x86_64 1.20-2.el9 rhel-9-for-x86_64-baseos-rpms 184 k Transaction Summary ================================================================================ Install 1 Package Total download size: 184 k Installed size: 764 k Is this ok [y/N]: y Downloading Packages: chkconfig-1.20-2.el9.x86_64.rpm 177 kB/s | 184 kB 00:01 -------------------------------------------------------------------------------- Total 177 kB/s | 184 kB 00:01 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : chkconfig-1.20-2.el9.x86_64 1/1 Error unpacking rpm package chkconfig-1.20-2.el9.x86_64 Verifying : chkconfig-1.20-2.el9.x86_64 1/1 Installed products updated. Failed: chkconfig-1.20-2.el9.x86_64 First off, the "error unpacking rpm..." error message and the "Installed products updated" messages seem contradictory; I don't understand exactly what's going on there. Secondly, this appears to make no difference - I'm still unable to do the cntlm install. Can anyone suggest how I can fix this so that I can install cntlm?