I have a line with spaces in the start for example " Hello world". I want to insert this line to a specific line in a file. for example insert " hello world" to the next file
hello
world
result:
hello
hello world
world
I am using this sed script:
sed -i "${line} i ${text}" $file
the problem is that i am getting my new line with out the spaces:
hello
hello world
world
You can escape the space character, for example to add 2 spaces:
sed -i "${line} i \ \ ${text}" $file
Or you can do it in the definition of your text variable:
text="\ \ hello world"
You only need one \ to input multiple blanks like this
sed -i "${line} i \ ${text}" $file
$ a=" some string "
$ echo -e "hello\nworld"
hello
world
$ echo -e "hello\nworld" | sed "/world/ s/.*/${a}.\n&/"
hello
some string .
world
The . was added in the substitution above to demonstrate that the trailing whitepsaces are preserved. Use sed "/world/ s/.*/${a}\n&/" instead.
It can be done by splitting the expression like this:
sed -i $file -e '2i\' -e " $text"
This is a GNU extension for easier scripting.
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a\ textappends the text with 4 spaces at the front.