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Operating Systems Linux Red Hat sed Help
# 1  
Old 03-12-2014
RedHat sed Help
Hi,

I want to replace

Code:
[[ $SSH_TTY != "" ]]  with #[[ $SSH_TTY != "" ]]

their is a extra # in second one and vice versa.

I tried - some combination...I am not getting the exact result...please help
# 2  
Old 03-13-2014
Hi guy,
mean this?
Code:
echo '[[ $SSH_TTY != "" ]]'|sed 's/\[\[ $SSH_TTY != "" ]]/#&/'

Last edited by Lucas_0418; 03-13-2014 at 12:27 AM..
# 3  
Old 03-13-2014
Thanks..I tried this and it echoed the desired result
Code:
echo '[[ $SSH_TTY != "" ]]'|sed 's/\[\[ $SSH_TTY != "" ]]/#&/'

How make it write on the file ?

ex: /home/myfile
Last edited by Franklin52; 03-13-2014 at 05:10 AM.. Reason: Please use code tags
# 4  
Old 03-13-2014
u r welcome~

Is this [[ $SSH_TTY != "" ]] in the current /home/myfile now, and you want to replace it and write back to this file?

If so, just try this:
Code:
mv /home/myfile /home/myfile.bak
sed 's/\[\[ $SSH_TTY != "" ]]/#&/' /home/myfile.bak > /home/myfile

and if your OS is linux and doesn't need a backup, with option -i in gnu sed, can just do this:
Code:
mv /home/myfile /home/myfile.bak
sed -i 's/\[\[ $SSH_TTY != "" ]]/#&/' /home/myfile

# 5  
Old 03-13-2014
Thanks buddy..This works for me... Have a good day ahead :-)

I will check the reverse part.
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