
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 17.5K Views
200K Contest Question # 1:
- Take the latest RHEL Troubleshooting Challenge and let us know if you were able to fix the problem - https://play.instruqt.com/rhel/invite/vj8hdenefrfu
Accepted Solutions


- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 10.5K Views
So I've seen a few comments in the post-activity ratings that indicate people need to 'reboot' to fix the problem. That's not how I would recommend 'fixing' it. It also means you took an unscheduled downtime on your system that you could have resolved without rebooting.

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,711 Views
Wonderful challenge ! Really enjoyed

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,692 Views
Thanks for putting this together!


- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,653 Views
Too easy!
Do you accept ideas for the challenges? I think I can recall some real life issues from my experience.
Thanks!


- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,258 Views
I would love to hear suggestions! I can't promise that we can implement them, but would be really interested in more real-life problems that we can diagnose and resolve.
-Scott
Scott McBrien
Manager, Technical Marketing
Red Hat Enterprise Linux
RHCE (100-000-264)


- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 6,722 Views
The ones I can recall right now:
Rotating log files without restarting the service. File is deleted while still being open by Apache or Tomcat, "du" shows 10% /var/log filesystem usage, while "df" says the usage is 100%.
Mounting NFS for temporary usage and forgetting to unmount. The NFS server gets rebooted at some point, so the NFS mount hangs. Admin scripts which depend on the storage (like checking free space) begin to hang as well, so their functions like cleaning directories and log rotation gets paused too. And if someone forcefully unmounts the bad NFS mount during business hours, show begins: released from the hanging state, log rotation scripts start to do their job at 1pm instead of 1am
Security improvements is a special topic. For example, specifying a group name with allowed SSH login in sshd_conf. Non-members of this group can't log in via SSH anymore, and this cause isn't easy to find.
Using immutable flag and ACLs with files may be impressive for those who don't use them - and most ones don't.
Backup files in the drop-in config directories, like /etc/sudoers.d ! Sysadmins forget than both old and new versions are active, so they overlap and create unexpected effects.

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,635 Views
Nice challenge

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,635 Views

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,589 Views
Hello done

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- 7,501 Views
@Abdellatif It should show the completed (check mark sign ) like others have shared. Please check once if it is showing completed.