8 нояб. 2013 г. · Use sed 's insert ( i ) option which will insert the text in the preceding line. ... Also note that some non-GNU sed implementations (for example ...

29 окт. 2015 г. · I have a text file and I want to prepend some text to the first line. I tried something like this: sed -i '1i\'"string" file However this inserts a new line to ...

12 янв. 2017 г. · To insert a # in the beginning of the second line of a text, you may use sed like this: sed '2 s/./#&/' input.txt >output.txt

26 окт. 2017 г. · I'm trying to write a basic sed script, I want to append to lines that start with SSID:. Here is what I'm trying now: #!/bin/sed -f /^SSID:/ s/*/

19 янв. 2020 г. · I want to search the string 'CPU_check' in vi editor (crontab -e) and then add # add the beginning of the line to comment it out.

23 нояб. 2019 г. · I'm trying to insert a string "hello world" before of a text file named "test.txt", i already do it with sed, but unfortunately "sed command" kill my memory, ...

24 мар. 2014 г. · Right now I'm using echo "Hello World" >> file.txt to append some text to a file but I also need to add text below a certain string let's say [option] , is it ...

27 янв. 2015 г. · I am trying to add a line of text to the beginning of a text file ... If you want to print to another file just add >outputfile after the command, ...

7 сент. 2014 г. · To edit every other (aka every second) line, starting with the first, with GNU sed, do sed '1~2s/^/>/' your_file. This will write the modified file to the ...

5 янв. 2021 г. · As a solution, you can enclose the instructions in double quotes: sed -i "1s/^/$var\n/" file.txt Note however that I would recommend using the "insert" command ...