如何从 ssh 配置文件中删除主机条目? [英] How can I remove a Host entry from an ssh config file?

问题描述

文件的标准格式为:

主机示例主机名 example.com端口 2222主机示例2主机名 two.example.com主机三.example.com端口 4444

知道主持人的简称，我想删除整个条目，以便用新的详细信息重新添加.

我得到的最接近的是这个，除了我需要保留以下 Host 声明并且第二个搜索词将捕获两个多个词(例如 HostName):

sed '/Host example/,/\nHost/d'

解决方案

使用 GNU sed:

host=示例"sed 's/^Host/\n&/' 文件 |sed '/^Host ''$host''$/,/^$/d;/^$/d'

输出:

<预>主机示例2主机名 two.example.com主机三.example.com端口 4444

---

<块引用>

s/^Host/\n&/:在以Host"开头的每一行之前插入一个换行符

/^Host '"$host"'$/,/^$/d: 删除所有匹配Host $host"的行；到下一个空行

/^$/d:清理:删除每一个空行

The standard format of the file is:

Host example
  HostName example.com
  Port 2222
Host example2
  Hostname two.example.com

Host three.example.com
  Port 4444

Knowing the host's short name, I want to remove an entire entry in order to re-add it with new details.

The closest I have got is this, except I need to keep the following Host declaration and the second search term will capture two many terms (like HostName):

sed '/Host example/,/\nHost/d'

解决方案

With GNU sed:

host="example"
sed 's/^Host/\n&/' file | sed '/^Host '"$host"'$/,/^$/d;/^$/d'

Output:

Host example2
  Hostname two.example.com
Host three.example.com
  Port 4444

---

s/^Host/\n&/: Insert a newline before every line that begins with "Host"

/^Host '"$host"'$/,/^$/d: delete all lines matching "Host $host" to next empty line

/^$/d: clean up: delete every empty line

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