diff --git a/blog/golang/golang-standard.md b/blog/golang/golang-standard.md
index f51595648c2ca39512abce7c971811c7084cd9ef..2f9ae9b269585c48d40b82d44eeccafff2dc1861 100644
--- a/blog/golang/golang-standard.md
+++ b/blog/golang/golang-standard.md
@@ -2,7 +2,7 @@
 
 标准库文档：https://pkg.go.dev/std
 
-## os模块
+## os模块-文件目录操作
 
 os模块实现了平台无关的编程接口
 
@@ -182,6 +182,8 @@ func main() {
 
 ```
 
+## os模块-文件读写操作
+
 读取文件
 
 ```go
@@ -223,8 +225,6 @@ func main() {
 
 ```
 
-### File文件读写操作
-
 打开现有文件
 
 ```go
@@ -348,4 +348,280 @@ func main() {
     }
 }
 
+```
+
+
+写入字节数组
+
+```go
+package main
+
+import (
+    "os"
+)
+
+func main() {
+    // 追加写入
+    f, _ := os.OpenFile("demo.txt", os.O_RDWR|os.O_APPEND, 0775)
+
+    f.Write([]byte("hello"))
+
+    f.Close()
+}
+
+```
+
+写入字符串
+```go
+package main
+
+import (
+    "os"
+)
+
+func main() {
+    // 覆盖写入 
+    f, _ := os.OpenFile("demo.txt", os.O_RDWR|os.O_TRUNC, 0775)
+
+    f.WriteString("hello")
+
+    f.Close()
+}
+
+```
+
+指定起始点
+
+```go
+package main
+
+import (
+    "os"
+)
+
+func main() {
+    f, _ := os.OpenFile("demo.txt", os.O_RDWR, 0775)
+
+    f.WriteAt([]byte("hello"), 3)
+
+    f.Close()
+}
+
+```
+
+## os模块-进程相关操作
+
+示例
+
+```go
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+func main() {
+	// 获得当前进程id
+	fmt.Printf("os.Getpid(): %v\n", os.Getpid())
+	// os.Getpid(): 92729
+
+	// 获得父进程id
+	fmt.Printf("os.Getppid(): %v\n", os.Getppid())
+	// os.Getppid(): 92713
+
+	// 设置进程属性
+	attr := &os.ProcAttr{
+		// files指定新进程继承的活动文件对象
+		// 参数：标准输入、标准输出、标准错误输出
+		Files: []*os.File{os.Stdin, os.Stdout, os.Stderr},
+		// 新进程的环境变量
+		Env: os.Environ(),
+	}
+
+	// 开启新进程 (name string, argv []string, attr *ProcAttr)
+	p, _ := os.StartProcess("/Users/user/Applications/golang/1.19/bin/go",
+		[]string{"/Users/user/Applications/golang/1.19/bin/go", "run", "hello.go"},
+		attr)
+
+	fmt.Printf("p: %v\n", p)
+	// p: &{94937 0 0 {{0 0} 0 0 0 0}}
+
+	fmt.Printf("p.Pid: %v\n", p.Pid)
+	// p.Pid: 94937
+
+	// 通过进程id查找进程
+	p2, _ := os.FindProcess(p.Pid)
+	fmt.Printf("p2: %v\n", p2)
+	// p2: &{95057 0 0 {{0 0} 0 0 0 0}}
+
+	// 等待10秒执行函数
+	time.AfterFunc(time.Second*10, func() {
+		// 向p进程发送退出信号
+		p.Signal(os.Kill)
+	})
+
+	// 等待进程p 退出，返回进程状态
+	ps, _ := p.Wait()
+	fmt.Printf("ps.String(): %v\n", ps.String())
+	// ps.String(): exit status 0
+}
+
+```
+
+## os模块-环境变量相关
+
+示例
+
+```go
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+    // 获取所有环境变量
+    s := os.Environ()
+    fmt.Printf("s: %v\n", s)
+
+    // 获取某个环境变量
+    s2 := os.Getenv("GOROOT")
+    fmt.Printf("s2: %v\n", s2)
+
+    // 设置环境变量
+    os.Setenv("GO_EVN_VAR", "go_evn_var")
+
+    // 查找环境变量
+    s3, _ := os.LookupEnv("GO_EVN_VAR")
+    fmt.Printf("s3: %v\n", s3)
+    // s3: go_evn_var
+
+    // 表达式替换
+    s4 := os.ExpandEnv("var: $GO_EVN_VAR")
+    fmt.Printf("s4: %v\n", s4)
+    // s4: var: go_evn_var
+
+    // 清空环境变量
+    // os.Clearenv()
+}
+
+```
+
+## io模块-输入输出
+
+io包封装了如下操作
+
+- io 为IO原语操作（I/O primitives）提供基本的接口 os、File、Reader、Writer
+- io/ioutil 封装了一些实用函数
+- fmt 实现了格式化I/O，类似C语言中的printf 和 scanf
+- bufio 实现带缓冲的I/O
+
+基本的IO接口
+
+```go
+type Reader interface {
+    Read(p []byte) (n int, err error)
+}
+
+type Writer interface {
+    Write(p []byte) (n int, err error)
+}
+```
+
+以下类型实现了Reader和Writer接口
+
+```go
+os.File (Reader和Writer)
+strings.Reader (Reader)
+bufio.Reader (Reader)
+bufio.Writer (Writer)
+bytes.Buffer (Reader和Writer)
+bytes.Reader (Reader)
+compress/gzip.Reader (Reader)
+compress/gzip.Writer (Writer)
+crypto/cipher.StreamReader (Reader)
+crypto/cipher.StreamWriter (Writer)
+crypto/tls.Conn (Reader和Writer)
+encoding/csv.Reader (Reader)
+encoding/csv.Writer (Writer)
+```
+
+示例
+
+```go
+package main
+
+import (
+    "fmt"
+    "strings"
+)
+
+func main() {
+    r := strings.NewReader("Hello world")
+    buf := make([]byte, 5)
+    n, err := r.Read(buf)
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+    } else {
+        fmt.Printf("n: %v\n", n)
+        // n: 5
+        fmt.Printf("buf: %v\n", string(buf))
+        // buf: Hello
+    }
+
+}
+
+```
+
+reader拷贝到writer
+
+```go
+package main
+
+import (
+    "fmt"
+    "io"
+    "os"
+    "strings"
+)
+
+func main() {
+    r := strings.NewReader("Hello world")
+
+    // 复制到标准输出流，实际效果为：打印到控制台
+    _, err := io.Copy(os.Stdout, r)
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+    }
+    // Hello world
+}
+
+```
+
+带缓冲区的拷贝
+
+```go
+package main
+
+import (
+    "fmt"
+    "io"
+    "os"
+    "strings"
+)
+
+func main() {
+    r := strings.NewReader("Hello world")
+    buf := make([]byte, 8)
+
+    _, err := io.CopyBuffer(os.Stdout, r, buf)
+    if err != nil {
+        fmt.Printf("err: %v\n", err)
+    }
+    // Hello world
+}
+
 ```
\ No newline at end of file
diff --git a/blog/golang/index.md b/blog/golang/index.md
index 7ca329b6ade6ad2f4c2cf863f9b94027eb88563d..7f484556affdcf8ef7e96f17cdeffd1a58972f9a 100644
--- a/blog/golang/index.md
+++ b/blog/golang/index.md
@@ -54,5 +54,4 @@
 https://www.bilibili.com/video/BV1ME411Y71o?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
 
 
-
-https://www.bilibili.com/video/BV1zR4y1t7Wj?p=80&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file
+https://www.bilibili.com/video/BV1zR4y1t7Wj?p=84&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file