一、打印除匹配行之外的其它行,使用grep -v
打印行首不包含$或#的注释行:cat file| grep -v ^$ | grep -v ^#
打印某文本文件行首不包含$或#的注释行:egrep -v "^#|^$" nginx.conf.default
知识点:
1、行首-------^
2、正则表达式“或”-------|
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