Practical Ethical Hacking - The Complete Course

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Subnetting part 1

subnet mask rekentrucje

aantal hosts voor een /24: $2^{32-24}$ = $2^8$ = 256

	Subnet	Hosts	Network	Broadcast
192.168.1.0/24	255.255.255.0	254	192.168.1.0	192.168.1.255
192.168.1.0/28	255.255.255.240	14	192.168.1.0	192.168.1.15
192.168.1.16/28	255.255.255.240	14	192.168.1.16	192.168.1.31
192.168.0.0/23	255.255.254.0	510	192.168.0.0	192.168.1.255
192.168.2.0/23	255.255.254.0	510	192.168.2.0	192.168.3.255
ZELF DOEN
192.168.0.0/22	255.255.252.0	1022	192.168.0.0	192.168.3.255
192.168.1.0/26	255.255.255.192	62	192.168.1.0	192.168.1.63
192.168.1.0/27	255.255.255.224	30	192.168.1.0	192.168.1.31

Navigating the file system

locate:

• • Explanation: Searches for files and directories in a prebuilt database.
    • Example: Running locate myfile.txt would search for the file named “myfile.txt” in the prebuilt database and display its path if found.

updatedb:

• • Explanation: Updates the database used by the locate command to reflect recent changes in the file system.
    • Example: Running updatedb would update the database, allowing the locate command to provide up-to-date search results.