Category Archives: Operating Systems

Windows : Time synchornization

There might be a few situations where you need more flexibility than what the clock UI can provide. In that case, you will need some help from the command line and registry. To manually synchronize the clock with a time server using the command line :

NOTE : Replace <ntp_server> with the server IP or… Read More »

Linux : perl: warning: Setting locale failed

You probably noticed the following output on your console after logging to your newly installed CloudLinux server : perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_CTYPE = “UTF-8”, LANG = “en_US.UTF-8” are supported and installed on your system. perl: warning: Falling back to… Read More »

Windows : The following error occurred attempting to join the domain “domain.tld”: The request is not supported.

Ending up with the following error trying to join a server or workstation to an existing Active Directory domain? The following error occurred attempting to join the domain “domain.tld”: The request is not supported. Additionally, if you have a look at the EventViewer, you can see the following log entries under the following logging facility… Read More »

Linux : fuser command not found on CentOS/RHEL 7

You may have encountered the following issue trying to run “fuser” command on CentOS/RHEL 7 : fuser: command not found Many system administrators turn to do minimalist installation with version 7, unfortunately this even cut some critical basic components such as “traceroute, ifconfig, fuser, etc.” which in my opinion should be a part of a… Read More »

Mac : Unable to negotiate with x.x.x.x port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

With the latest macOS Sierra 10.12 release, you might have observed issue connecting to servers or network devices running SSH. Please note that this article does not necessary apply or macOS, but any running OS with the latest OpenSSH v7. Because of the latest OpenSSH version, some older (legacy) encryption algorithm have been removed from… Read More »

Linux : How to enable NTP loopfilter statistics on RHEL/CentOS?

You may end up at some point where you need detailed statistics about time synchronization on your Linux machine. To achieve that, simply do the following : 1. Edit your NTP configuration file :

2. Append the following parameters :

3. Restart the NTP daemon :