Simplicity is the ultimate sophistication. — Leonardo Da Vinci

less is more

• The basic problem is actually very complicated.
• It's amazing that computers only use 0s and 1s.

handy tools

# download bigfile
$ aria2c -c -k1M -{x,j,s}16 --checksum=md5=xxx http://big.iso
# backup txt files
$ rsync -avzm --include '*/' --include '*.txt' --exclude '*' source/ remote:target/
# transfer file at 100kB/s
$ rsync -hP --bwlimit 100 remote:file .
# convert jsonl to csv
$ mlr --l2c cat input.jsonl > output.csv
# http proxy
$ ncat -v -l --proxy-type http 3128
# convert socks5 to http
$ delegate -P8080 SERVER=http SOCKS=1.2.3.4:1080 [email protected]
# convert socks5 to http with auth
$ delegated -f -P8080 SERVER=http FORWARD=socks://user:[email protected]:1080 [email protected]
# zero-padding file names
$ rename 's/^\d+/sprintf("%02d", $&)/e' [0-9]*
# concat video parts
$ printf "file '%s'\n" part*.mp4 | ffmpeg -f concat -i - -c copy all.mp4
# scan raspberry pi
$ sudo nmap -n -sP 192.168.1.0/24 -oX - | xmlstarlet sel -t -m '//host[address[contains(@vendor, "Raspberry Pi")]]/address[@addrtype="ipv4"]/@addr' -v . -n | ssh-keyscan -t rsa -f - | sort -u - ~/.ssh/known_hosts -o ~/.ssh/known_hosts
# upgrade all outdated python packages
$ pip list --outdated | awk '{print 1ドル}' | xargs -tn1 pip install
# generate birthdays wordlist for aircrack-ng
$ dateseq -f '%Y%m%d' 1970年01月01日 > birthdays.txt
# install python on raspberry pi
$ ansible pi --limit pi2 -e ansible_user=alarm --ask-pass --su --ask-su-pass -m raw -a 'pacman -Sy --noconfirm python2'
# resize sdcard for raspberry pi
$ echo -e 'p\nd\n2\nn\np\n2\n\n\np\nw' | fdisk /dev/mmcblk0
$ reboot
$ resize2fs /dev/mmcblk0p2
# authorized key initialization
$ sshpass -p xxxxxx ssh-copy-id -o StrictHostKeyChecking=no user@server
# open google chrome in full-screen mode
$ open -a 'Google Chrome' --args --kiosk https://github.com/
# customized hostname
$ curl --resolve 'httpbin:80:23.22.14.18' http://httpbin/headers
# add ssh pubkey to multiple servers
$ ansible rpi -m authorized_key -a 'user=pi key="ssh-rsa ..."'
# brute force attack openwrt
$ hydra -f -l root -P password.list 192.168.1.1 http-form-post '/cgi-bin/luci:luci_username=^USER^&luci_password=^PASS^:S=302 Found'
# dump obs-studio events
$ websocat -t -u autoreconnect:ws://127.0.0.1:4444 reuse:appendfile:obs.jl
$ ncat -vlk 8080 -c 'ncat -v --proxy-type socks5 --proxy 127.0.0.1:1086 ipinfo.io 80'
$ curl -H Host:ipinfo.io 127.0.0.1:8080
$ { printf 'FF:FF:FF:FF:FF:FF'; printf '11:22:33:44:55:66%.0s' {1..16}; } | tr -d : | xxd -r -p - | ncat -u 255.255.255.255 9

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