Record Type Example A Record IPv4 Address "$domain".com AAAA Record IPv4 Address "$domain".com CNAME Alternative Address "$domain".rs, "$subdomain.$domain".com NS Nameserver ns1.fastname.com MX Email server "$domain".com TXT Literally anything,including ownership of a domain Query a host with the host command. 1host …

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1sudo pacman -S docker 1sudo usermod -aG docker $USER 1sudo systemctl start docker You need to either log out and back in again to be in the docker group, or run everything as root. 1# docker info This should show you things are working. Search for a distro you want 1docker search debian If you get a hit, pull it. …

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Install yt-dlp. 1yt-dlp --write-auto-sub <URL> It will default to English, but you can specify another language with the flag --sub-lang: 1youtube-dl --sub-lang sv --write-auto-sub <URL> You can list all available subtitles with: 1yt-dlp --list-subs <URL> It's also possible to skip the video and only download the …

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1domain=splint.rs 2mkdir $domain 3cd $domain 4wget --recursive --convert-links --backup-converted \ 5 --page-requisites --level=inf --adjust-extension \ 6 -U "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)" \ 7 -p --mirror --html-extension --convert-links \ 8$domain

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This is bare-bones, original, primitive e-mail. Install opensmtpd (or similar), then ncat or nc or netcat (this mysterious cat has many names). Start the opensmtpd service, then use netcat to speak with the mail-daemon: 1nc localhost 25 The computer should respond with code 220, which means 'I am listening'. 220 hex …

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Set up a file like this, called troubleshooting.txt. [ Is there an IP address? ] -- no --> [ Check NIC driver, dmesg ] [ Is there an IP address? ] -- yes --> [ Can you ping the router? ] [ Can you ping the router? ] -- no --> [ Check cables, router, and switches ] [ Can you ping the router? ] -- yes --> [ Can you ping …

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Compose a statement for execution. 1x='echo $y' 2echo $x 3y=dragon 4eval "$x" The results remain in the current shell, unlike sub-shells. 1b=basilisk 2sh -c 'echo $b' 3eval "g=goblin" 4echo $g

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Find metadata: 1exiftool "$file".jpg Find info on all .png images in current directory. 1exiftool -ext .png . You can make this recurring with the -r switch. And overwrite all metadata: 1exiftool -all= -overwrite_original -ext jpg . (NB: This does not work on pdf data. See here for erasing all pdf data) Or just GPS …

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Monitor all processes: 1extrace Monitor one process: 1extrace ls Monitor a script: 1./script.sh | extrace

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SSH Daemon Jail 1sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.d/ssh.local 1[sshd] 2enabled = true 3 4ignoreip = 127.0.0.1/8 ::1,192.168.0.0/16 ::1 1sudo systemctl restart fail2ban 1sudo fail2ban-client status 1sudo fail2ban-client status sshd

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