在使用sed的特定行之前插入多行文本

Question

我想在特定行之前插入几行文本，但在尝试添加新行字符时仍然出现sed错误。我的命令看起来像：

sed -r -i '/Line to insert after/ i Line one to insert \\ 
    second new line to insert \\ 
    third new line to insert' /etc/directory/somefile.txt 

所报告的错误是：

sed: -e expression #1, char 77: unterminated `s' command 

我尝试使用\n，\\（如上例），无字可言，只是移动第二行到下一行。我也试过类似的东西：

sed -r -i -e '/Line to insert after/ i Line one to insert' 
    -e 'second new line to insert' 
    -e 'third new line to insert' /etc/directory/somefile.txt 

编辑！：道歉，我希望在现有的文本之前插入，而不是之后！

Answer 1

这应该工作：

sed -i '/Line to insert after/ i Line one to insert \ 
second new line to insert \ 
third new line to insert' file 

Answer 2

sed -i '/Line to insert after/ i\ 
Line one to insert\ 
second new line to insert\ 
third new line to insert' /etc/directory/somefile.txt 

Answer 3

这可能会为你工作（GNU sed的&击）：

sed -i $'/Line to insert after/a\line1\\nline2\\nline3' file 

Answer 4

对于除个别线路简单替代其他任何东西，用awk代替为了简单，清晰，鲁棒性等等等等。

要插入之前行：

awk ' 
{ print } 
/Line to insert after/ { 
    print "Line one to insert" 
    print "second new line to insert" 
    print "third new line to insert" 
} 
' /etc/directory/somefile.txt 

Answer 5

这LL从第一行。对于如作品：如果你想从一个文件中的第三行插入，替换“1I

awk ' 
/Line to insert before/ { 
    print "Line one to insert" 
    print "second new line to insert" 
    print "third new line to insert" 
} 
{ print } 
' /etc/directory/somefile.txt 

要在行后面插入“到”3i“。

sed -i '1i line1'\\n'line2'\\n'line3' 1.txt 

cat 1.txt 

line1 
line2 
line3 
Hai 

Answer 6

符合POSIX标准，并在OS X上运行，我用下面的（单引号线和空行是用于演示）：

sed -i "" "/[pattern]/i\\ 
line 1\\ 
line 2\\ 
\'line 3 with single quotes\` 
\\ 
" <filename>