For those who would like to install Insync on RHEL 8 this should be the content of insync.repo:
[insync]
name=insync repo
baseurl=http://yum.insync.io/fedora/28/
gpgcheck=1
gpgkey=https://d2t3ff60b2tol4.cloudfront.net/repomd.xml.key
enabled=1
metadata_expire=120m
Thanks @peke
I tried from current fedora/32 downwards until yum does not claim about missing glibc version to install from somewhere… and found that I can install the insync-3.1.9... package from fedora/29 with CentOS 8 Stream.
File: /etc/yum.repos.d/insync.repo
[insync]
name=insync repo
baseurl=http://yum.insync.io/fedora/29/
gpgcheck=1
gpgkey=https://d2t3ff60b2tol4.cloudfront.net/repomd.xml.key
enabled=1
metadata_expire=120m
I used the following commands to quickly check if it’s working:
nano /etc/yum.repos.d/insync.repo && yum makecache && yum install insync
Quick Output of success:
[root@localhost hochguertelto]# yum install insync
Last metadata expiration check: 0:00:04 ago on Mo 15 Jun 2020 16:15:16 CEST.
Dependencies resolved.
===========================================================================================================================================================================================
Package Architecture Version Repository Size
===========================================================================================================================================================================================
Installing:
insync x86_64 3.1.9.40821-fc29 insync 133 M
Transaction Summary
===========================================================================================================================================================================================
Install 1 Package
Total download size: 133 M
Installed size: 354 M
Is this ok [y/N]: Y
Downloading Packages:
insync-3.1.9.40821-fc29.x86_64.rpm 2.0 MB/s | 133 MB 01:07
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 2.0 MB/s | 133 MB 01:07
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : insync-3.1.9.40821-fc29.x86_64 1/1
Running scriptlet: insync-3.1.9.40821-fc29.x86_64 1/1
error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Resource temporarily unavailable)
error: https://d2t3ff60b2tol4.cloudfront.net/repomd.xml.key: key 1 import failed.
Insync installation has finished. You may now start it.\n
fs.inotify.max_user_watches = 1048576
Verifying : insync-3.1.9.40821-fc29.x86_64 1/1
Installed:
insync-3.1.9.40821-fc29.x86_64
Complete!
Thanks!!
Hello everyone,
Does somebody has succesfully installed insync in RHEL 9? I have tried with al FC36…FC26 and it does installs but it just wont start 
Hello, @Iki_Sandino!
So sorry for missing this post. Could you let me know if you’ve also tried F35?