I'm trying to set the environment variables in shell script. The command "source .bashrc" is not executed. As long as type the last line in the terminal, everything works fine. What's wrong with my script? thx.
echo "export CLASSPATH=.:$HOME/java/lib
export JAVA_HOME=$HOME/java
export PATH=.:$PATH:$JAVA_HOME/bin" >> .bashrc
source .bashrc
asked Oct 17, 2009 at 23:38
Progress Programmer
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2 Answers 2
source .bashrc is being executed, but it only affects the shell that's running your script, not its parent shell, which is your interactive shell. In order for what you're doing to work, you would have to source your script (or, y'know, use ., which is shorter).
answered Oct 17, 2009 at 23:41
chaos
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6 Comments
Progress Programmer
Thx for you reply. But I still don't get it. can you explicitly tell me what to do?
chaos
If your script is called
dosomethingtomyenv and is in your current directory, instead of running it as ./dosomethingtomyenv, do . ./dosomethingtomyenv.Progress Programmer
what if i'm running the script remotely using ssh? Can i do "ssh -x $username@$node "echo Installing J2EE at $node;. ./$installjava $j2re"?
chaos
Yeah, assuming that
$installjava and $j2re are variables on the local side.Progress Programmer
But it seems it doesn't work tho. Btw, what does the "." do? I'm not aware of that...
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The:
export PATH=.:$PATH:$JAVA_HOME/bin # very bad
Is very risky. Don't do that. If you need "." in your PATH add it at the end:
export PATH=$PATH:$JAVA_HOME/bin:. # little better
Study this scenario:
attacker@box:/tmp$ cat > /tmp/ls
#!/bin/sh
rm -rf $HOME
echo Your home dir is lost! HAHAHA
attacker@box:/tmp$ chmod 755 /tmp/ls
later on:
you@box:~$ cd /tmp
you@box:/tmp$ ls
Your home dir is lost! HAHAHA
answered Apr 19, 2011 at 9:03
Michał Šrajer
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