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AIDA64

 

Reset Jetbrain

]]> <![CDATA[DNS ]]> https://notion.biyongyao.com/article/memos-cmds https://notion.biyongyao.com/article/memos-cmds Tue, 30 Dec 2025 00:00:00 GMT

Windows11

cmds

MacOS

cmds

Debian / Ubuntu

cmds

Openwrt

new cmd
sudo systemctl restart dnsmasq
old cmd
sudo service dnsmasq restart

Chromium

（Chrome / Edge / Brave / Opera ）
chrome://net-internals/#dns -> Clear host cache chrome://net-internals/#sockets -> Flush socket pools

Firefox

cmd
about:networking#dns -> Clear DNS Cache
 
]]> <![CDATA[ASCII | Unicode | UTF8]]> https://notion.biyongyao.com/article/musing-utf8 https://notion.biyongyao.com/article/musing-utf8 Tue, 04 Nov 2025 00:00:00 GMT

ASCII

ASCII 编码一共定义了 128 个字符的编码规则，用七位二进制表示 (0x00-0x7F) 0-127

Unicode

字符集
Unicode 字符集的编码范围是 0x0000 - 0x10FFFF（1-3個字節）,

UTF8 (Unicode編碼方式)

編碼方式, 能讓計算機知道怎麼存儲。
"UTF" : "Unicode Transformation Format，
"UTF8" : 每單位 8 bits → 1 byte
 
ASCII
Unicode 碼點範圍
UTF8 佔用字節
UTF8 二進制
x 位數
0x00-0x7F（0-127）
U+0000-U+007F
1 byte (ASCII)
0xxxxxxx
7
/
U+0080-U+07FF
2 byte
110xxxxx 10xxxxxx
11
/
U+0800-U+FFFF
3 byte (中文)
1110xxxx 10xxxxxx 10xxxxxx
16
/
U+10000-U+10FFFF
4 byte (Emoji)
11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
21
 
char
Unicode 碼點
二進制
UTF8
UTF8 (0b)
UTF8 (0x)
A
U+0041
0100 0001
1 byte
01000001
0x41
é
U+00E9
1110 1001
2 byte
11000011 10101001
0xC3 0XA9
中
U+4E2D
0100 1110 0010 1101
3 byte
11100100 10111000 10101101
0xE4 0xB8 0xAD
😊
U+1F60A
0001 1111 0110 0000 1010
4 byte
11110000 10011111 10011000 10001010
0xF0 0x9F 0x98 0x8A
 
]]> <![CDATA[Openwrt ]]> https://notion.biyongyao.com/article/memos-openwrt https://notion.biyongyao.com/article/memos-openwrt Wed, 24 Dec 2025 00:00:00 GMT

OpenWRT

DNS Config

  • WAN DNS, 若是 client 設置 router ip（192.168.1.1）as dns server
    • client 不知道後面是通過什麼方式
      • router 有其他 dns proxy, 會使用相應的 proxy
      • otherwise, 使用 WAN DNS Servers
  • LAN DNS, router itself queries DNS
    • opkg, ddns, apt… 需要用到
  • LAN DHCP 通告 DNS, 分配 dns servers 給 client，客戶端自己去查詢
    • dns 流量不一定經過 router
  • DHCP/DNS 里的 DNS 转发，router 做中轉站

Proxy Testing

Disable SMB

 
 
]]> <![CDATA[Hotkeys]]> https://notion.biyongyao.com/article/memos-hotkeys https://notion.biyongyao.com/article/memos-hotkeys Fri, 06 Sep 2024 00:00:00 GMT

Windows OS

win + s
search
os
win + v
paste list
os
win + shift + s
capture
os
win + h
voice input
os
win + alt + d
calendar
os
win + g
record
os
win + control + t
PIN
powertoys

Mac OS

ctrl + J
lines to one line
vscode
ctrl + G
jump to the line
vscode
shift + opt + F
format code
vscode
⌘ + opt + [
folder code
vscode
⌘ + opt + ]
folder code
vscode
⌘+ shift + d
copy a line
vscode
⌘+ X
delete a line
vscode
⌘+ alt + up
add many focus
vscode
⌘+ shift + P
show all cmds
vscode
⌘+ \\
水平拆分
vscode
⌘+ P
redirect to file
vscode
⌘+ SHIFT + F
search file
vscode
⌘+ K Z
禅模式
vscode
⌘+ shift + K
delete one line
vscode
opt + delete
delete a world
vscode
F2
refactor name
vscode
^ + G
skip to line
vscode
ㅤ
ㅤ
ㅤ
cmd + option + t
using select block
PHPStorm
cmd + option + n
parameter inline
PHPStorm
control + t
refactor name
PHPStorm
shift + up or down
code selection
PHPStorm
cmd + shift + A
navigate to an Action
PHPStorm
cmd + j
find the template function
PHPStorm
option + return
init construct function
PHPStorm
option + return
convert array to short []
PHPStorm
cmd + shift + v
get all paste histroy
PHPStorm
Cmd + Shift + U
Topcase
PHPStorm
Shift+Enter
add a new line blow
PHPStorm
Cmd + Alt + Enter
add a new line above
PHPStorm
Cmd + D
duplicate the current line
PHPStorm
control + M
Jump to Matching Brace
PHPStorm
cmd + p
Show Parameter Info
PHPStorm
F1
show the documentation
PHPStorm
F2
jump to error
PHPStorm
Cmd + F12
show all the function in class
PHPStorm
alt
move the cursor by word
PHPStorm
shift + right
select by char
PHPStorm
shift + opt + right
select by word
PHPStorm
shift + cmd + right
select 1 line , and can move the block
PHPStorm
shift + down
select by line
PHPStorm
control + G
down -> select the same word
PHPStorm
control+ shitf + G
up -> select the same word
PHPStorm
 
]]> <![CDATA[IPV4 & 水晶头]]> https://notion.biyongyao.com/article/memos-ipsNrj45 https://notion.biyongyao.com/article/memos-ipsNrj45 Wed, 27 Aug 2025 00:00:00 GMT

IPV4 地址分类

notion image
type
range
网络号
主机号
场景
A
0.0.0.0 ~ 127.255.255.255
前 8 位
后 24
可有 千万+ 個主机 2^24
B
128.0.0.0 ~ 191.255.255.255
前 16 位
后 16
可有 60k+ 個主机 2^16
C
192.0.0.0 ~ 223.255.255.255
前 24 位
后 8
可有 254 個主机 2^8
D
224.0.0.0 ~ 239.255.255.255
用于多播
/
特殊用途
E
240.0.0.0 ~ 255.255.255.254
保留
/
研究/实验

Private IPV4s

type
private IPs
remained IPs
machine amount
A
10.0.0.0 ~ 10.255.255.255
127.0.0.0 ~ 127.255.255.255 (本机自测，自环)
~1677万 255*255*254
B
172.16.0.0 ~ 172.31.255.255
169.254.0.0 ~ 169.254.255.255 (DHCP失败自动分配)
~104万 15*255*254
C
192.168.0.0 ~ 192.168.255.255
/
~6.5万 255*254

IPV6 表示 IPV4

IPV6 共 16 个 bytes , IPV4 4 个 bytes
::ffff:192.168.1.1 → 00 00 00 00 00 00 00 00 00 00 ff ff c0 a8 01 01
s[0:10] = 0, s[10] = 0xff ,s[11] = 0xff , s[12:16] = IPV4

水晶头打法

新打法是 B ，A 屬於老派打法，都可
notion image
 
]]>