Linux script to insert in a file a new line

Question

I have a problem I am trying to write a script that will allowed me to write on a conf file for so i was trying to use a sed command but it looks like it works but doesn't save it in the file so my script is

sed '/# Load Java configuration/i JBOSS_User=root'  ITg.conf

this should add "JBOSS_User=root" after the line "# Load Java configuration"

How can I do it?

@hek2mgl I don't think it is a duplicate to this one. However, the solutions there may help: you need to say `sed 's/find/replace/' file` and use `-i` to perform in-place replacement. — fedorqui, Aug 19 '16 at 14:38
@fedorqui I realized that in the moment I've pressed the button. Unfortunately SO doesn't allow me to change that. However, the answers there will help. Actually there are likely a ton of valid duplicates. — hek2mgl, Aug 19 '16 at 14:39

score 0 · Accepted Answer · answered Aug 19 '16 at 14:37

try this;

sed -i '/# Load Java configuration/i JBOSS_User=root'  ITg.conf

before this command, make backup as below;

cp ITg.conf ITg.conf_backup

man sed :

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

              edit files in place (makes backup if SUFFIX supplied)

Linux script to insert in a file a new line

1 Answers1