alias df='df -h -x tmpfs -x devtmpfs -x squashfs'
alias xc='xclip -sel clipboard'
alias ttfb='curl -so /dev/null -w "HTTP %{http_version} %{http_code} Remote IP: %{remote_ip}\nConnect: %{time_connect}\nTTFB: %{time_starttransfer}\nTotal time: %{time_total}\nDownload speed: %{speed_download}bps\nBytes: %{size_download}\n"'

ap() {
https $@ Accept:application/activity+json
}

shodan() {
xdg-open https://shodan.io/domain/$1
dig +short $1 | xargs -i xdg-open https://shodan.io/host/{}
}

check_mtu() {
local target=$1
shift
local lower=0
local upper=1500
until [[ $((lower + 1)) -eq $upper ]]; do
current=$(((lower + upper) / 2))
echo -n "lower: $lower, upper: $upper, testing: $current -- "
if ping -M do -s $current -c 2 -i 0.2 $target $@ &> /dev/null; then
echo "ok"
lower=$current
else
echo "fail"
upper=$current
fi
done

echo "max packet size: $lower, mtu: $((lower + 28))"  

}
제가 쓰는 건 이 정도 되네요