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安装依赖

yum install gcc rpm-build rpm-devel rpmlint make python bash coreutils diffutils
yum install rpmdevtools

准备build文件

1. 生成目录

rpmdev-setuptree

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Let's Encrypt DNS challenge Manual - Certot

Challenge选择

DNS

知识

• 认识DNS
• DNS 原理入门

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how to check private/public key match

ssh-keygen -y -e -f private.key

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how to check private/public key match

ssh-keygen -y -e -f private.key

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query table size

SELECT table_name AS `Table`, round(((data_length + index_length) / 1024 / 1024), 2) `Size (MB)` FROM information_schema.TABLES WHERE table_schema = "$your_database";

query column size

SELECT sum(char_length($your_column))/1024/1024 FROM $your_table

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GO Test

go test -coverprofile=c.out             
go tool cover -html=c.out 

go test -bench . -cpuprofile=cpu.profile
go tool pprof cpu.profile

Example

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A collapsible section with markdown

Click to expand!

Heading

1. A numbered
2. list
   • With some
   • Sub bullets

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#!/bin/bash

LOG_FILE="/tmp/user_script_log"

logit()
{
    echo "[${USER}][`date`] - ${*}" >> ${LOG_FILE}
}

logit "Start to user script to update default gw"