Question

在这里，虚荣是一个变量，我需要使用sed命令从第一个出现的“ members”单词开始，将该变量的内容放置在行的末尾

#!/bin/bash
vanity=$()

testing.txt文件包含以下信息：

define hostgroup{
        hostgroup_name  NA-servers ; The name of the hostgroup
        alias           NA region ; Long name of the group
        members         abc.com,def.com,ghi.com,jkl.com
        }

define hostgroup{
        hostgroup_name  SA-servers ; The name of the hostgroup
        alias           SA region ; Long name of the group
        members         abcd.com,defg.com,ghij.com,jklm.com
        }

我已经尝试过此命令：

sed "1,/members/s/$/,$vanity/" testing.txt

但它返回以下输出：

define hostgroup{,mno.com
        hostgroup_name  NA-servers ; The name of the hostgroup,mno.com
        alias           NA region ; Long name of the group,mno.com
        members         abc.com,def.com,ghi.com,jkl.com,mno.com
        }

必需的输出：

define hostgroup{
        hostgroup_name  NA-servers ; The name of the hostgroup
        alias           NA region ; Long name of the group
        members         abc.com,def.com,ghi.com,jkl.com**,mno.com**
        }

define hostgroup{
        hostgroup_name  SA-servers ; The name of the hostgroup
        alias           SA region ; Long name of the group
        members         abcd.com,defg.com,ghij.com,jklm.com
        }

Answer 1

使用GNU sed：

sed '/NA-servers/,/}/{s/members.*/&,mno.com/}' file

输出：

define hostgroup{
        hostgroup_name  NA-servers ; The name of the hostgroup
        alias           NA region ; Long name of the group
        members         abc.com,def.com,ghi.com,jkl.com,mno.com
        }

define hostgroup{
        hostgroup_name  SA-servers ; The name of the hostgroup
        alias           SA region ; Long name of the group
        members         abcd.com,defg.com,ghij.com,jklm.com
        }

Answer 2

使用GNU sed的另一种方法是仅将值附加到第一次出现的情况：

sed '0,/members.*/{s//&'"$vanity"'/;}' file

如果您尚未安装GNU sed，请尝试使用此POSIX兼容的计算机：

sed '1,/members.*/{s/members.*/&'"$vanity"'/;}' file

使用sed命令在Linux中编辑配置文件

2 个答案: