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Edit variable in a file

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# 1  
Old 04-27-2013
Question Edit variable in a file
Hello,
I have a script which reads variable values from /system/pt.conf
I sourced it already.

But the probelm is I don't know how to edit only the value from the variable "res" in the conf file.

pt.conf:
Code:
res=1280x720
log=1

And I want to edit the value "1280x720" from "res".

I was trying
Code:
sed -i 's/$res/320x480/g' /system/pt.conf

But it didn't worked. Still the same value.
Last edited by Scrutinizer; 04-27-2013 at 09:04 AM.. Reason: code tags
# 2  
Old 04-27-2013
Hi, try:
Code:
'/^res=/s/=.*/=320x480/'

Last edited by Scrutinizer; 04-27-2013 at 09:14 AM..
# 3  
Old 04-27-2013
Thanks,
I tried it but I get a "blank" line.
I need to press Ctrl+C to get out of it.
# 4  
Old 04-27-2013
Try this.

Code:
sed -i 's/res=1280x720/res=320x480/g' /system/pt.conf

Last edited by Scrutinizer; 04-27-2013 at 09:54 AM.. Reason: code tags
# 5  
Old 04-27-2013
Code:
$ cat set-res.sh
# usage set-res.sh 300x300
new_res="$1"
sed -i "s/^res=.*/res=$new_res/" /system/pt.conf

This User Gave Thanks to hanson44 For This Post:
FD1999
# 6  
Old 04-28-2013
Thank you,
that worked.
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