bash - sed -e "\$aDNS3=" won't save the DNS3= to the file -

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sed -e "\$adns3=" <filedirectory>

i'm trying add in line "dns3=" in end of file, after executing command in bash script, opens file , include dns3= last line did not save changes. there anyway save changes , not show changes made?

you can use -i option. edit file in-place.

from man sed:

-i[suffix], --in-place[=suffix]

edit files in place (makes backup if suffix supplied)

using sed -e "\$adns3=" -i filename set dns3= last line of file.


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