[linux]Enumerating subdomain

A server has a dns service and its ip address is 10.10.10.13, so I use nslookup and change the server to 10.10.10.13, and find out what is its fqdn. It is revealed that its fqdn is ns1.cronos.htb, so I am guessing the domain name would be cronos.htb too. To find out its sub domains in … Continue reading [linux]Enumerating subdomain

[linux] named pipe

I am learning new things while attempting hackthebox machines, one of the thing I learned about linux is the named pipe. To identify whether the file is a named pipe you can list like this: But if you try to read the content of the /tmp/f the screen will seem like hang... Because this file … Continue reading [linux] named pipe

[python] Improving get_project_dirs method of SSHClient subclass

I noticed I did not have enough testing on my code for getting directories under base project directory. This is part of the code snippet of my SSHClient subclass: The problem The method gets all things under the base directory that is files and directories, that is because I have sliced and diced too much … Continue reading [python] Improving get_project_dirs method of SSHClient subclass

[Arch Linux]Could not boot to Arch and stuck in grub shell

I have made the grub configuration with grub-mkconfig -o /boot/grub/grub.cfg in the arch-chroot environment, after i generated the grub config I exited from the arch-chroot and unmount the /mnt then reboot, Arch could not be booted but instead my console was stucked in grub. this is because I have not downloaded the linux-firmware which includes … Continue reading [Arch Linux]Could not boot to Arch and stuck in grub shell

Debian: Checking your Linux for potential rootkit

You have been tasked to set up a Linux server, you have just installed the core packages of debian with debian small CD. After installation is completed, you download two rootkit checkers: apt-get update #To ensure you have the latest package database. apt-get upgrade #To ensure you have the latest package with security holes patched. … Continue reading Debian: Checking your Linux for potential rootkit

Wireshark for Linux: No interface is listed.

You are using Debian, you installed wireshark, launched it and found that there was no interface (under interface list) for wireshark to capture; you checked /etc/group and did not find a group known as wireshark, then it is most likely libpcap-dev not installed. sudo apt-get install libpcap-dev sudo dpkg-reconfigure wireshark-common. A ncurse screen appears asking … Continue reading Wireshark for Linux: No interface is listed.

Wireshark (/usr/bin/dumpcap permission denied)

The error "/usr/bin/dumpcap permission denied" appeared when executing wireshark as a normal user. Using package manager to install wireshark may encounter this problem. This is solved by adding normal user into group wireshark: gpasswd -a cyrus wireshark Check to see if you are in the group wireshark: cat /etc/group |grep wireshark Once ensure your username … Continue reading Wireshark (/usr/bin/dumpcap permission denied)