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 »
You may encounter the following error message with Microsoft Outlook, while browsing your IMAP tree folders, sending a message or moving message across them : IMAP server wants to alert you to the following: fatal error: no such file or directory I have observed this behaviour with a mailbox and a Linux mail servers (Qmail,… Read More »
Having the following error trying to convert a live CentOS/RHEL Linux system with VMware Converter? FAILED: A general system error occurred: Network error. Host x.x.x.x key can’t be retrieved. (return code 2) In my case, this happened while converting a RHEL 5.11 server with VMware Converter 6.1.1. If you went through the following : – SSH… Read More »
Among all the new bells and whistles coming with the latest major release of RedHat Enterprise Linux platform, resolution bot both the installation process and system console have changed (higher resolution than before is default). Unfortunately, server system does not necessarily have the newest display device or iLO, iDRAC and virtual machine consoles are out… Read More »
Need to forward a custom port to an existing port on your Linux box? Simply use the following command as root : iptables -t nat -I PREROUTING –src 0/0 –dst 0.0.0.0/0 -p tcp –dport <port-to-forward> -j REDIRECT –to-ports <destination-port> Example : Assuming you want to forward port 1025 to port 587 : iptables -t nat -I PREROUTING… Read More »
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 »
This post will cover the complete installation and setup of a NFS client and server on SuSE Linux. By default, the system include the NFS client but not the server. First of all, make sure that NFS traffic is allowed if you are running any firewall on the client/server machine. You can achieve this through… Read More »
By default, Microsoft Exchange Server will place the MailStore database in the installation folder as followed : C:\Program Files\Micros oft\Exchange Server\V15\Mailbox\Mailbox Database 0000000000\Mailbox Database 0000000000.edb It may be suitable for small scale setup, however you may want to change it to a different path for various reasons when come to medium or large scale setup…… Read More »
If you are running mission critical VMs under VMware, that even doing a planned maintenance for reboot to increase disk space isn’t a proper justification to achieve this task, you have to find a way to to it on the fly! Fortunately, there is ways around to make it happen. 1. You will first do… Read More »
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 : /etc/ntpd.conf 2. Append the following parameters : statistics loopstats statsdir /var/log/ntpstats/ filegen peerstats file peers type day link enable filegen loopstats… Read More »