Linux
It can be needed to test an UDP connection with a server to ensure that connectivity is working and double check the data received. Let's take a simple example with a remote logstash server: * Server mylogstash.mydomain.local * Listening on port 5000 On emitter side, we are sending
Linux
Your monitoring system is claiming that your server is running out of free inodes but your disks are not full at all? Maybe you just need to check your filesystem usage and how many files are being used at the same time... Here are some tips to check and identify
Linux
With Linux version for Skype, it can happen that group conversation are not working as expected (conversations do not start, or updates are not working, or group members do not appear, ...). You can check MSNP version you are using by typing this command in any conversation chat: /dumpmsnp If you
Linux
Once a docker container is started, it's always hard to get access into and see what's happening inside. As a workaround, the easiest way to understand what's happening in a container is to get a CLI on it and investigate. Since version 1.3,
Linux
You're getting this annoying error message again and again when trying to fetch certificate and/or establish a connection to your website using openssl:139647967614624:error:14077438:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert internal error:s23_clnt.c:769: This issue is well known in several
Linux
If you want to isolate multiple networks, you can use VLAN (Virtual LAN). On most of the switches, you can configure VLAN to handle tagged packets and be able to send them to a specific port by isolating it. A VLAN is assigned a specific id that can be any
Linux
It's sometimes necessary to execute one git command with a special SSH key rather that the one you're running with (for example on a remote console). This can be easily done by using such command: ssh-agent bash -c 'ssh-add /home/myuser/.ssh/github.
Linux
To aggregate results from a command line and count number of results for each field, you can combine multiple tools like awk, cut, uniq and sort to obtain the expected results. For example, if you want to retrieve count of connections opened per IP onto your server, just run: netstat
Linux
Need to generate the hash for a password? No need to use an online generator, totally insecure for your passwords ... This simple command will ask you which string you want to hash and will return you the result after pressing "Enter" key! python -c "import crypt, getpass,
Linux
To limit the fragmentation of packets and optimize your network, it can be necessary to find the best MTU size to set up on your interface. In order to find this best value, you can use a simple ping command. We're first trying with a MTU size of
Linux
In the most modern Linux systems, you will find memory-based file systems to make access to disk storage much faster by allocating some RAM space on a disk mount point. But this means that this disk area will be ephemeral and won't exist anymore after a system
Linux
First of all, you need to update repositories, and make sure you have all the needed packages ready and installed:sudo apt-get update sudo apt-get install build-essential openssl libssl-dev pkg-config Then, you can retrieve the sources from the official NodeJS website by downloading the "