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ubuntu 22.04 设置 DNS

  1. 修改 /etc/resolvconf/resolv.conf.d/head
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vim /etc/resolvconf/resolv.conf.d/head

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 114.114.114.114

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troubleshooting
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Tab Sync Pro 无法登录

https://chrome.google.com/webstore/detail/jdlfehkflgfmniokcligbfdjobgapehn

点击插件，然后Debug，会发现发送一个 Account 请求，但是没有携带 Bearer Token，所以无法登录。根据请求的发起地方，设置一个断点。

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async function Q(t, e) {
    const s = new URLSearchParams(e);
    return (await fetch(`${F}/api/${t}` + (s ? `?${s}` : ""), {
        headers: {
            Authorization: `Bearer ${K}`
        }
    })).json()
}

设置一个断点，等一会就好，应该是没有等待拿到值。

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linuxspeedtest
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Linux 测速

互联网测速

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wget https://raw.github.com/sivel/speedtest-cli/master/speedtest.py
chmod a+rx speedtest.py
mv speedtest.py /usr/local/bin/speedtest
chown root:root /usr/local/bin/speedtest

speedtest

节点间测速

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sudo apt install iperf

# service
iperf -s

# client

iperf -c <SERVER_IP>

ssh 测速

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yes | pv |  ssh USER@HOST "cat > /dev/null"