Awk 批量更新文本文件中的行

我正在寻找一个单行程序（理想情况下）来更改以下所有实例：

# dropped packets chart for kvm890.0 = auto

到

我应该注意到“kvm890.0”的变化，例如：

# dropped packets chart for kvm508.0 = auto
# dropped packets chart for kvm864.0 = auto
# dropped packets chart for kvm357.0 = auto
# dropped packets chart for kvm822.0 = auto
# dropped packets chart for kvm785.0 = auto

任何想法都将不胜感激。

只需使用sed：

sed -i 's/STRING_TO_REPLACE/NEW_STRING/g' filename

---

将字符串分为两部分，捕获第一组（

\1

）中的已知部分，并将所有其他部分替换为字符串

否

sed  's/\(dropped packets chart for.*= \).*/\1no/g' textfile
# dropped packets chart for kvm508.0 = no
# dropped packets chart for kvm864.0 = no
# dropped packets chart for kvm357.0 = no
# dropped packets chart for kvm822.0 = no
# dropped packets chart for kvm785.0 = no

或

在这里，当行中出现字符串的丢弃数据包图表时，只需将所有的

自动

更改为

否

sed '/dropped packets chart for/ s/\<auto\>/no/g' textfile
# dropped packets chart for kvm508.0 = no
# dropped packets chart for kvm864.0 = no
# dropped packets chart for kvm357.0 = no
# dropped packets chart for kvm822.0 = no
# dropped packets chart for kvm785.0 = no

sed'/drop packets图表，用于/s/\/no/g'文本文件
#kvm508.0的丢弃数据包图表=否
#kvm864.0的丢弃数据包图表=否
#kvm357.0的丢弃数据包图表=否
#kvm822.0的丢弃数据包图表=否
#kvm785.0的丢弃数据包图表=否

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sed '/dropped packets chart for/ s/\<auto\>/no/g' textfile
# dropped packets chart for kvm508.0 = no
# dropped packets chart for kvm864.0 = no
# dropped packets chart for kvm357.0 = no
# dropped packets chart for kvm822.0 = no
# dropped packets chart for kvm785.0 = no