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ELF, PE/COFF, MACH-0

April 13, 2026
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 |  information, linux, macos, windows
Although they all serve the same purpose (telling the processor what to execute), they are like different languages; that’s why an .exe file doesn’t “understand” […]

BIOS and UEFI

April 12, 2026
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 |  bios, configuration, firmware, information, linux, Linux Ubuntu Server, macos, uefi
BIOS (legacy mode – old) The BIOS is so old that when it boots, the processor is in “Real Mode”. It can only see 1 […]

file system

April 11, 2026
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 |  apfs, exfat, ext4, fat32, file system, hfs+, information, linux, macos, ntfs, OS, pendrive USB, windows
Imagine a hard drive as a giant library with empty shelves. The file system is the librarian and the index: it decides how the books […]

dd command

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 |  command, information, linux, Linux Ubuntu Server, macos, pendrive USB
He is nicknamed “the disc surgeon” or “Disk Destroyer” (There is no verification question if you want to run the command) Be careful when using […]

be able to ping one’s own PC/server (from internet)

April 6, 2026
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 |  command, configuration, information, internet, linux, Linux Ubuntu Server, macos, server, windows
By default, in the router’s “firewall” settings, option “Block Anonymous Internet Requests” is enabled and blocks ping You need to disable it and save it […]

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