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  #1  
Old 01-17-2008
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Join Date: Nov 2006
Posts: 187
replace a string
hello

I have a file where an entry needs to be modified. an example of this entry is:

install_location=/xena/sybase/ase12_5

I need to replace xena with another hostname (`hostname` output) for example:

install_location=/dx1/sybase/ase12_5

how to do that?

thanks
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  #2  
Old 01-17-2008
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Code:
 
eval sed 's/xena/`hostname`/' file
should work
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  #3  
Old 01-17-2008
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Posts: 1,580
no need for eval
Code:
sed "s/xena/`hostname`/" file
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  #4  
Old 01-17-2008
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true - bad habit of mine overusing eval :-)
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  #5  
Old 01-17-2008
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Join Date: Nov 2006
Posts: 187
thanks. but the string may change:

install_location=/xena/sybase/ase12_5

I want everything between =/ and /sybase to be replaced with the hostname

thx
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  #6  
Old 01-17-2008
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Location: Scotland
Posts: 290
bit clunky but:

Code:
 sed "s_=/.*/sybase_=/`hostname`/sybase_" file
should work
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  #7  
Old 01-17-2008
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Code:
sed -e "s/\(install_location=.\)[^/]*\(\/.*\)/\1`hostname`\2/g" file
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