如何在 .conf 文件中的非唯一鍵中從終端更改鍵的值？

我有一個鍵/值格式的 .conf 文件。但是可能有一些非唯一的鍵。它們之間的區別如下：

###
### [meta]
###
### Controls the parameters for the Raft consensus group that stores metadata
### about the InfluxDB cluster.
###

[meta]
 # Where the metadata/raft database is stored
 dir = "/var/lib/influxdb/meta"

# Automatically create a default retention policy when creating a 
database.
 # retention-autocreate = true

 # If log messages are printed for the meta service
 # logging-enabled = true

###
### [data]
###
### Controls where the actual shard data for InfluxDB lives and how it is
### flushed from the WAL. "dir" may need to be changed to a suitable         place
### for your system, but the WAL settings are an advanced configuration. The
### defaults should work for most systems.
###

[data]
 # The directory where the TSM storage engine stores TSM files.
 dir = "/var/lib/influxdb/data"

 # The directory where the TSM storage engine stores WAL files.
 wal-dir = "/var/lib/influxdb/wal"

我想要實現的是在fedora中編寫一個腳本來更改塊下dir鍵的值。data我在這裡看到了一個用於唯一鍵的類似腳本（https://stackoverflow.com/questions/2464760/modify-config-file-using-bash-script）。但不幸的是，這對我不起作用。我怎樣才能做到這一點？

假設您的文件名是 foo.conf 並且您想將 dir 值更改為“/dev/sdh”，下面的程式碼將僅替換數據部分的 dir 關鍵字。

sed -re '/^\[data\]$/,/^\[/ s/^(\s+)*(dir = .*)$/\1dir = "\/dev\/sdh"/' foo.conf

/^\[data\]$/,/^\[/

這部分使 sed 僅適用於“數據”部分。您可以將“數據”替換為任何關鍵字，使其適用於任何部分。

引用自：https://unix.stackexchange.com/questions/555901