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I am using chef recipes for setting java_home. For that i am using sed command for finding JAVA_HOME string in bash_profile and then going to replace that line with 

export JAVA_HOME="a/b/java"

so how to replace that line with sed command.

sethvargo
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sandip divekar
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2 Answers2

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This should work whether or not JAVA_HOME is found

sed -i '/JAVA_HOME/d;$aexport JAVA_HOME="a/b/java"' .bash_profile
Zombo
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    +1; just to make it explicit: this will always place the line at the _end_ of the file; OSX (FreeBSD) version: `sed -i '' -e '/JAVA_HOME/d;$a\'$'\n''export JAVA_HOME="a/b/java"' .bash_profile` – mklement0 May 05 '14 at 15:09
  • Hi steven, I am having another query. If i want to use command at replacement variable. e.g sed -i '/namenode/cnamenode=for a in `cat value.txt | grep namenode | cut -d "=" -f2`; do echo $a; done' output.txt I am runing this command but it is replacing the line with "namenode=for a in `cat value.txt | grep namenode | cut -d "=" -f2`; do echo $a; done" but actually i want "namenode=8080" – sandip divekar May 06 '14 at 09:51
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Another sed,

sed -i.bak '/JAVA_HOME/s@.*@export JAVA_HOME="a/b/java"@' .bashrc
sat
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