sed使用摘记

1.  sed -i -e '/^'$prev_node'$/a\'$new_line'' "$CONFIG_FILE_PATH/$path"  其中$prev_node=  aop:, 文件是

server:
    url: http://testjkweb.tourongjia.com
spring:
  aop:
      auto: true
      proxy-target-class: false
  redis:
    host: 192.168.10.80
    database: 1
    password: tourongjia123
  http:
    multipart:
      max-file-size: 4000KB
      max-request-size: 40000KB
  datasource:

'/^'$prev_node'$/竟然匹配不上，而'/^'$prev_node'/就匹配上了，百思后，原来是源文件中有特殊字符。

用cat -A /home/vobile/project/tourongjia/configbak/application.yml 打开，发现文件是这样的：

      proxy-target-class: false^M$
  redis:^M$
    host: 192.168.10.80^M$
    database: 1^M$
    password: tourongjia123^M$
  http:^M$
    multipart:^M$
      max-file-size: 4000KB^M$
      max-request-size: 40000KB^M$
  datasource:^M$
    testWhileIdle: true^M$
    timeBetweenEvictionRunsMillis: 60000^M$
    validationQuery: SELECT 1^M$
  activemq:^M$
    brokerUrl: tcp://192.168.10.161:61616^M$
mybatis:^M$

$前还有个^M,是个软回车。难怪。