What is Chrony? Chrony is a modern implementation of the Network Time Protocol (NTP) used to synchronize a Linux system's clock with accurate external time sources. It consists of two main components: * chronyd – the daemon that continuously synchronizes the system clock. * chronyc – the command-line utility used to
Requirements This tutorial has been written for this specific following configuration. It might work if you have something similar, but you might have to tweak some parameters. Here are the components that have been used: * Raspberry 3B * Touch Screen 3.5 * SD Card 16GB Initial setup As a start, you
It is sometimes useful to get the timing details of a curl request, for analysis, investigation or just monitoring. Thanks to curl implementation, there's an easy way to get timing details. This can be done with two ways: a formatting file or directly on command line. We will
It's easy on a linux system to monitor in real time the content of a log file by using tail -f /var/log/my_file.log If you want to do the same thing with windows, you can easily do that by using Get-Content -Path 'C:
By default, some logs (like squid logs) will be recorded with unix timestamp, stored as <unixtimestamp>.<centisecond> which are hard to read for analysis. You would have for example this kind of logs: 1702397611.273 14010 192.168.1.2 TCP_MISS_ABORTED/000 0 GET
This script does allow a quick check of the local certificates, in order to make sure none of them is expired: for pem in /etc/ssl/certs/*.crt /etc/ssl/certs/*.pem /etc/pki/tls/certs/*.pem /etc/pki/tls/certs/*.crt; do printf '%s: %s\n' \ "
When a process is starting sub-processes on a linux system, you would have to stop every single child processes in order to stop them all. Instead of that, you can easily kill the parent process so it can stop spawning new process. You can find the parent process with
If you have a bash script running with a very long loop (or infinite one) and starting multiple background processes, you will notice that when you stop the main process, all the child processes will continue to live until you restart the machine or you kill them one by one.
Sometimes you might need to download some pip packages offline on a device with no Internet access. This is entirely feasible through multiple ways. Install a single package: You first need to download that package on a device with Internet access (using pip package as an example) wget https://files.
If you get the following error when trying to execute a sudo command, despite the fact that you configured your sudoers or sudoers.d config file properly: sudo: pam_unix(sudo:auth): conversation failed sudo: pam_unix(sudo:auth): auth could not identify password for [user] Then, you might need
If you want to filter some specific logs and redirect them to another server or to another file, you can use the module provided with rsyslog called "omprog". Thanks to that module, you can just ask rsyslog to execute a script on every logs you have from a
FIPS (Federal Information Processing Standard) can be enabled (by default or not) on linux kernels to enable the FIPS kernel cryptographic features. But in some case, this can also lead to some issues with openssl, or any cryptographic tool that you can use within any code. You can check if