Linux 如何使用bash从文本文件中删除前两行和后四行？
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How to delete first two lines and last four lines from a text file with bash?
提问by rebca
I am trying to delete first two lines and last four lines from my text files. How can I do this with Bash?
我试图从我的文本文件中删除前两行和后四行。我怎样才能用 Bash 做到这一点？
采纳答案by Frédéric Hamidi
回答by Debaditya
Head and Tail
首尾
cat input.txt | tail -n +3 | head -n -4
Sed Solution
解决方案
cat input.txt | sed '1,2d' | sed -n -e :a -e '1,4!{P;N;D;};N;ba'
回答by pizza
You can call the ex editor from the bash command line using the following sample. Note it uses a here documentto end the list of commands to ex.
您可以使用以下示例从 bash 命令行调用 ex 编辑器。请注意，它使用here 文档来结束 ex 的命令列表。
ex text.file << EOF
1,2d
$
-3,.d
x
EOF
回答by finferflu
This is the quickest way I found:
这是我找到的最快的方法：
sed -i 1,2d filename
