Install chkrootkit by entering the following commands in the terminal:
sudo apt update sudo apt install chkrootkit
The chkrootkit security scanner searches the local system for signs that it is infected with a 'rootkit'. Rootkits are set of programs and hacks designed to take control of a target machine by using known security flaws. . Types that chkrootkit can identify are listed on the project's home page. . Please note that where chkrootkit detects no intrusions, this does not guarantee that the system is uncompromised. In addition to running chkrootkit, more specific tests should always be performed.