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sed + 删除“#”字符以防出现行

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sed + 删除“#”字符以防出现行

我们有以下文件：

   cat graphite-web.conf

   #<IfModule mod_authz_core.c>
   #    # Apache 2.4
   #    Require local
   #    Order Allow,Deny
   #    Allow from All
   #    Require all granted
   #</IfModule>
   #<IfModule !mod_authz_core.c>
   #    # Apache 2.2
   #    Require all granted
   #    Order Allow,Deny
   #    Deny from all
   #    Allow from All
   #    Allow from ::1
   #</IfModule>

删除“要求全部授予”行之前的 # 的最佳方法是什么

  • “#”字符不在行首

预期输出：

   #<IfModule mod_authz_core.c>
   #    # Apache 2.4
   #    Require local
   #    Order Allow,Deny
   #    Allow from All
        Require all granted
   #</IfModule>
   #<IfModule !mod_authz_core.c>
   #    # Apache 2.2
   #    Require all granted
   #    Order Allow,Deny
   #    Deny from all
   #    Allow from All
   #    Allow from ::1
   #</IfModule>

答案1

sed解决方案：

sed 's/#\([[:space:]]*Require all granted\)/ \1/' graphite-web.conf

输出：

   #<IfModule mod_authz_core.c>
   #    # Apache 2.4
   #    Require local
   #    Order Allow,Deny
   #    Allow from All
        Require all granted
   #</IfModule>
   #<IfModule !mod_authz_core.c>
   #    # Apache 2.2
        Require all granted
   #    Order Allow,Deny
   #    Deny from all
   #    Allow from All
   #    Allow from ::1
   #</IfModule>

要就地编辑文件 - 添加-i选项：

sed -i ....

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