1 前言

一个问题，一篇文章，一出故事。
笔者最近需要快速地修改一堆nginx的配置文件，详细的需求是把一个配置文件快速地拆分为两个配置文件。
于是想到使用匹配关键字、然后替换的方法。
总的来说，以后不用挨个修改配置文件，感觉总结此文比较有价值。O(∩_∩)O哈哈~

2 最佳实践

2.1 提前备份配置文件

tar -cvf /data/backup/nginx_conf.tar.bz2 /etc/nginx/

2.2 测试替换命令的作用范围

sourceSring="include /etc/nginx/public/header_safety.conf;"
cd /etc/nginx/
for i in `grep -R "$sourceSring" | cut -d":" -f1`; do
	echo $i
done

注：关键字为变量“sourceSring”定义的字符串

2.3 执行替换操作

sourceSring="include /etc/nginx/public/header_safety.conf;"
targetString="include /etc/nginx/public/header_HSTS.conf;\n    include /etc/nginx/public/header_X-Frame-Options.conf;"

cd /etc/nginx/
for i in `grep -R "$sourceSring" | cut -d":" -f1`; do
	sed -i "s~$sourceSring~$targetString~g" $i
done

需要注意的是，
– 以上把变量“sourceSring”定义的字符串替换为变量“targetString”的字符串
– 变量“targetString”字符串使用“\n”换行

2.4 确认执行

cd /etc/nginx/
grep -R "include /etc/nginx/public/header_HSTS.conf;"
grep -R "include /etc/nginx/public/header_X-Frame-Options.conf;"

2.5 禁用配置

sourceSring="include /etc/nginx/public/header_HSTS.conf;"
targetString="#include /etc/nginx/public/header_HSTS.conf;"
cd /etc/nginx/
for i in `grep -R "$sourceSring" | cut -d":" -f1`; do
	sed -i "s~$sourceSring~$targetString~g" $i
done

sourceSring="include /etc/nginx/public/header_X-Frame-Options.conf;"
targetString="#include /etc/nginx/public/header_X-Frame-Options.conf;"
cd /etc/nginx/
for i in `grep -R "$sourceSring" | cut -d":" -f1`; do
	sed -i "s~$sourceSring~$targetString~g" $i
done