Technical notes about Linux, WordPress, servers, security, automation and production maintenance.
Some time ago I noticed that my wordpress hacks are being hacked by logging into the backend of the website. A bot or a hacker is trying to do this using a set of passwords. I decided to secure the website’s backend by requiring additional authentication. In nginxe we can set this up by: We […]
It often happens that we have to catch a given message, e.g. “error” while browsing the logs. Alternatively, we look for the occurrence of a given phrase in the old files. Both “tail” and “grep” are very useful for this. Especially if the logs are set in verbal mode, where there is a lot of […]
Netcat, also known as “nc,” is a versatile networking tool that is commonly used in Linux and other Unix-like operating systems. It is a command-line utility that can be used for various network-related tasks, such as port scanning, file transfer, and even as a lightweight web server. The primary function of Netcat is to create […]
Netdiscover is a popular network discovery tool that is used in Linux to identify live hosts on a network. It sends ARP (Address Resolution Protocol) requests to the network and then listens for replies from active hosts. By analyzing the replies, Netdiscover can build a list of all hosts that are currently active on the […]
In this case, I’ll show you how to get IP from domains. We will save the domains in the file, then, after calling the command, we will get a list of IP addresses along with the names of the domains from which we want to get the IP address. Command that we will use is […]
re situations where we can benefit from generating arbitrary IP addresses in bash. In this case, the first octet situations where There are situations where we can benefit from generating arbitrary IP addresses in bash. In this case, the first octet situations where we can benefit from generating arbitrary IP addresses in bash. In this […]
In my opinion, one of the most important things about Linux is history. Thanks to it, we know what has been done in the system and we can quickly check what commands were executed in the system. When working on different systems it is very useful to use grep and use (ctrl + r) in […]
This time I will use Kali Linux it is a great distro for pentesters. After all, nothing prevents you from using another distribution, such as Debian Linux. Sometimes we need to check the certificate issuance date. Nmap and curl are a very good tool for this.Both of these tools allow for advanced analysis of the […]
Java Keytool is a command-line tool that is used for managing cryptographic keys, certificates, and keystores in Java-based applications. In Linux, Java Keytool is often used for managing SSL/TLS certificates and securing web applications that run on Java-based servers like Tomcat, GlassFish, and JBoss. Some of the key features of Java Keytool in Linux include: […]
This script helps to notify me by e-mail about the condition of the disk. Remember to indicate the disk accordingly – in this case it is “/dev/sda” and change the e-mail address from “soban@soban.pl” to your own. Save the script in “/root/checkbadsector.sh“: You can also download it from https://soban.pl/bash/checkbadsector.sh: Remember to grant permission to perform […]