Linux : apt-get Failed to fetch FailReason: ConnectionRefused

Experiencing the following issue trying to update your Debian distro using apt-get? # apt-get update Ign:1 http://deb.debian.org/debian stretch InRelease Hit:2 http://deb.debian.org/debian stretch Release Ign:3 http://repo.r1soft.com/apt stable InRelease Hit:4 http://repo.r1soft.com/apt stable Release Hit:5 http://security.debian.org/debian-security stretch/updates InRelease Ign:8 https://download.webmin.com/download/repository sarge InRelease Hit:9 https://download.webmin.com/download/repository sarge Release Err:11 https://packages.sury.org/php stretch InRelease FailReason: ConnectionRefused Reading package lists… Done W: Failed… Read More »

JunOS : Configure DNS forwarders on SRX device

If you want your SRX firewall to handle DNS requests on your network, you need to configure the forwarders to make this possible, in addition to a few other parameters. First, make sure you have no local forwarders set on the device itself as it cannot be used along with the dns-proxy service – if… Read More »

Windows : Nmap error dnet: Failed to open device eth0

Experiencing the following issue with Nmap on Windows? $ nmap -P0 -sS -T5 0.0.0.0 Starting Nmap 7.70 ( https://nmap.org ) at 2019-06-04 03:14 ric dnet: Failed to open device eth0 QUITTING! It appears that some version of Npcap (or WinPcap) is causing issues. Updating Npcap to version 0.995 solve this issue. If you are running… Read More »

Windows : Show available memory with PowerShell

Here is the command how to show the available system memory on Windows with PowerShell command :

Example :

Linux : How to manage Exim mail queue

Here are some useful commands to manage the Exim mail server queue. Show the mail queue content :

Show the amount of mail in the queue :

Delete a specific message in the queue, with the help of the first command in this example (exim -bp) to get the message ID :

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