package mainimport (    "os/exec"    "fmt")func main(){    cmd := exec.Command("find", "/home/d101270c/cbe", "-name","*.log", ">", "log.txt")    fmt.Println(cmd)    err := cmd.Run()    if err != nil {        fmt.Printf("%s\n", err)        return    }}運行結果：<1067 linux20 [d101270c] :/home/d101270c>uname -aLinux linux20 2.6.16.60-0.21-smp #1 SMP Tue May 6 12:41:02 UTC 2008 x86_64 x86_64 x86_64 GNU/Linux<1068 linux20 [d101270c] :/home/d101270c>tgo&{/usr/bin/find [find /home/d101270c/cbe -name *.log > log.txt] []  <nil> <nil> <nil> [] <nil> <nil> <nil> <nil> false [] [] [] [] <nil>}exit status 1該命令執行失敗，不log.txt存在。為什么？