sed and changing the file itself


 
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# 1  
Old 01-22-2008
sed and changing the file itself

hello

I have this:
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt

it will display on the screen what have changed. however I want to change file input.txt. Any idea other than doing redirection (>)

thx
# 2  
Old 01-22-2008
before i use sed to edit a file, first i backup the file, then i sed it with the backup into the orig file.
Code:
cp input.txt input.txt.bak
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt.bak>input.txt

Sorry, I do not know of a way without redirection
# 3  
Old 01-22-2008
Quote:
Originally Posted by melanie_pfefer
hello

I have this:
sed -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt

it will display on the screen what have changed. however I want to change file input.txt. Any idea other than doing redirection (>)

thx
If your sed support -i switch(backup file).
Code:
 
sed -i .bak -e "s/install_location=....../g" -e "s/hostname=....../g" -e "s/server_name=....../y" input.txt && rm input.txt.bak || mv -f input.txt.bak input.txt

If sed fail, restore the file from backup, if not remove the backup file.
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