[clue] env variables

Mon Jun 24 15:28:22 MDT 2013

so removing #!/bin/bash/ at the top of the script to stay within the same shell session doesn't make any detectable difference

I also added sourcing the file where the variables are set ( # source /etc/profile.d/00_jdk.sh  )  

the variables PATH and JAVA_HOME show up correct when the script is running ... but when finished, the variables are still not changed

[root at 87148-mondev01 ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin  ... should be appended with /usr/java/jdk1.7.0_21/bin
[root at 87148-mondev01 ~]# echo $JAVA_HOME
... should have an entry /usr/java/jdk1.7.0_21/bin ... but it is blank 

>________________________________
> From: "dennisjperkins at comcast.net" <dennisjperkins at comcast.net>
>To: CLUE's mailing list <clue at cluedenver.org> 
>Sent: Monday, June 24, 2013 2:56 PM
>Subject: Re: [clue] env variables
> 
>
>
>The proper place for these might be in one of the Bash config files.
>
>>________________________________
>From: "Stephen Queen" <svqueen at gmail.com>
>To: "Mark G. Harvey" <markgharvey at yahoo.com>, "CLUE's mailing list" <clue at cluedenver.org>
>Sent: Monday, June 24, 2013 2:37:49 PM
>Subject: Re: [clue] env variables
>
>
>When you add 
>#!/bin/bash
>to the top of your script, you are starting a new shell. When the script completes, it exits that shell. Instead "source" you environmental variables. Create a file my_env that contains your export commands
># cat my_env
>export JAVA_HOME=/usr/java/jdk1.7.0_21
>export PATH=$PATH:/usr/java/jdk1.7.0_21/bin
>
>Then source the file 
>. my_env
>
>(space between . and my_env, does not need to be executable).
>Now when you
># echo $JAVA_HOME
>usr/java/jdk1.7.0_21
># 
>
>Steve
>
>
>
> 
>
>
>
>
>On Mon, Jun 24, 2013 at 1:54 PM, Mark G. Harvey <markgharvey at yahoo.com> wrote:
>
>CLUE experts, 
>>
>>This puzzle is likely simple for you folks, but it has me stumped.  I've done considerable digging but have found mixed advice. 
>>
>>I've created a script to download from a local repo via wget an rpm to install JDK ... no problem there. 
>>
>>Here's the part I can't get right ... setting the variables so I can run scripts to install Tomcat ... Any attempt will bomb if it can't find /usr/java/jdk1.7.0_21/bin  
>>
>>
>># set JAVA_HOME variable   ... tried in vain
>>echo "setting JAVA_HOME variable variable for the session" 
>>JAVA_HOME=/usr/java/jdk1.7.0_21
>># export JAVA_HOME variable  ... tried in vain
>>echo "exporting JAVA_HOME variable variable for the session" 
>>export JAVA_HOME=/usr/java/jdk1.7.0_21
>>echo
 "JAVA_HOME variable: $JAVA_HOME"
>>
>># set PATH variable for the session   ... tried in vain
>>echo "setting PATH variable for the session" 
>>PATH=$PATH:/usr/java/jdk1.7.0_21/bin
>># export PATH variable for the session
>>echo "exporting PATH variable for the subsequent sessions & processes" 
>>export PATH=$PATH:/usr/java/jdk1.7.0_21/bin
>>echo "show PATH variable: $PATH"
>>
>>sleep 3  # wait
>>
>># create script to set JAVA_HOME & PATH variables in /etc/profile.d/00_jdk.sh script for all accounts
>># use echo command with single quotes to write the literal statement to the script
>>touch /etc/profile.d/00_jdk.sh
>>echo '#!/bin/bash' >> /etc/profile.d/00_jdk.sh
>>echo '# set JAVA_HOME in /etc/profile.d/00_jdk.sh script for all accounts' >> /etc/profile.d/00_jdk.sh
>>echo 'JAVA_HOME=/usr/java/jdk1.7.0_21' >> /etc/profile.d/00_jdk.sh
>>echo '# set PATH in /etc/profile.d/00_jdk.sh
 script for all accounts' >> /etc/profile.d/00_jdk.sh
>>echo 'PATH=$PATH:/usr/java/jdk1.7.0_21/bin' >> /etc/profile.d/00_jdk.sh  
>>
>>sleep 3  # wait
>>
>>echo "review contents of /etc/profile.d/00_jdk.sh"
>>cat /etc/profile.d/00_jdk.sh
>>
>>
>>... results of install ... added some blank lines for readability ...
>>
>>[root at 87148-mondev01 ~]# ./DEV_install_jdk1.7-1.0.0.sh 
>>installation:  Oracle/Sun jdk 1.7 64-bit
>>remount /tmp with execute privledge
>>changed to /tmp
>>Pulling package from Artifactory Repo Management Server
>>--2013-06-24 13:24:38--  https://<RepoHost>/artifactory/simple/ext-release-local/oracle/jdk/7u21-linux/jdk-7u21-linux-x64.rpm
>>Resolving <RepoHost>... 10.33.44.10
>>Connecting to <RepoHost>|10.33.44.10|:443...
 connected.
>>
>>HTTP request sent, awaiting response... 200 OK
>>
>>Length: 85388149 (81M) [application/x-rpm]
>>Saving to: “jdk-7u21-linux-x64.rpm”
>>
>>100%[=======================================================================================================================================>] 85,388,149  52.7M/s   in 1.5s    
>>
>>2013-06-24 13:24:40 (52.7 MB/s) - “jdk-7u21-linux-x64.rpm” saved [85388149/85388149]
>>
>>jdk downloaded
>>check /tmp/ contents for jdk
>>-rw-r--r--. 1 root root 85388149 Jun  6 16:46 jdk-7u21-linux-x64.rpm
>>install jdk rpm
>>Preparing...                ########################################### [100%]
>>package jdk-2000:1.7.0_21-fcs.x86_64 is already installed      ........ due to subsequent running of this script
>>install jdk complete
>>
>>setting JAVA_HOME variable variable for the session
>>exporting
 JAVA_HOME variable variable for the session
>>
>>... when tested in the script, the correct answer shows up ... 
>>
>>JAVA_HOME variable: /usr/java/jdk1.7.0_21   
>>
>>setting PATH variable for the session
>>exporting PATH variable for the subsequent sessions & processes
>>
>>... when tested in the script, the correct answer shows up ... 
>>
>>
>>show PATH variable: /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/jdk1.7.0_21/bin:/usr/java/jdk1.7.0_21/bin
>>
>>review contents of /etc/profile.d/00_jdk.sh
>>#!/bin/bash
>># set JAVA_HOME in /etc/profile.d/00_jdk.sh script for all accounts
>>JAVA_HOME=/usr/java/jdk1.7.0_21
>># set PATH in /etc/profile.d/00_jdk.sh  script for all accounts
>>PATH=$PATH:/usr/java/jdk1.7.0_21/bin
>>remount /tmp removing execute privledge
>>finished
>>
>>
>>... after script runs, when tested from CLI, variables not not correct
 ... 
>>
>>[root at 87148-mondev01 ~]# echo $JAVA_HOME
>>
>>[root at 87148-mondev01 ~]# echo $PATH
>>/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
>>
>>
>>
>>[root at 87148-mondev01 ~]# exit
>>logout
>>
>>[vwadmin at 87148-mondev01 ~]$ su -
>>Password: 
>>
>>
>>... now the variable additions show up ... they come from the /etc/profile.d/00_jdk.sh script created as part of the JDK download & install ... 
>>
>>[root at 87148-mondev01 ~]# echo $PATH
>>/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.7.0_21/bin:/root/bin
>>
>>[root at 87148-mondev01 ~]# echo $JAVA_HOME
>>/usr/java/jdk1.7.0_21
>>
>>
>>
>>... How can I get the variables to be available for the current root session & usable for subsequent installations?  Trying to avoid the logout / login ... 
>>
>>
>>
>>Thanks for your help.  
>>
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>
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