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go开启profile


import (
    _ "net/http/pprof"
)

http.ListenAndServe("0.0.0.0:8080", nil)
 
 
然后 
http://127.0.0.1:8080/debug/pprof 查看整体信息 
 
下载profile文件 执行
go tool pprof profile cpu_profile
直接top看
或者安装graphviz 然后web
 

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ubuntu 添加root登录

Login to your server as root. As the root user, edit the sshd_config file found in  /etc/ssh/sshd_config : vim /etc/ssh/sshd_config ( For details on working with Vim check out our article here !) Add the following line to the file, you can add it anywhere but it’s good practice to find the block about authentication and add it there. PermitRootLogin yes Save and exit the file. Restart the SSH server: systemctl restart sshd or service sshd restart