I'm trying to run an install script that requires java to be installed and the JAVA_HOME environment variable to be set.I've set JAVA_HOME in /etc/profile and also in a file I've called java.sh in /etc/profile.d.  I can echo $JAVA_HOME and get the correct response and I can even sudo echo $JAVA_HOME and get the correct response.In the install.sh I'm trying to run I inserted an echo $JAVA_HOME.  When I run this script as myself I see the java directory, but when I run the script with sudo it is blank.Any ideas why this is happening?I'm running CentOS
JAVA_HOME not set in script when run using sudo
sudo;environment variables
For security reasons, sudo may clear environment variables which is why it is probably not picking up $JAVA_HOME. Look in your /etc/sudoers file for env_reset.From man sudoers:env_reset   If set, sudo will reset the environment to only contain the following variables: HOME, LOGNAME, PATH, SHELL, TERM, and USER (in addi-           tion to the SUDO_* variables).  Of these, only TERM is copied unaltered from the old environment.  The other variables are set to           default values (possibly modified by the value of the set_logname option).  If sudo was compiled with the SECURE_PATH option, its value           will be used for the PATH environment variable.  Other variables may be preserved with the env_keep option.env_keep    Environment variables to be preserved in the user's environment when the env_reset option is in effect.  This allows fine-grained con-           trol over the environment sudo-spawned processes will receive.  The argument may be a double-quoted, space-separated list or a single           value without double-quotes.  The list can be replaced, added to, deleted from, or disabled by using the =, +=, -=, and ! operators           respectively.  This list has no default members.So, if you want it to keep JAVA_HOME, add it to env_keep:Defaults   env_keep += JAVA_HOMEAlternatively, set JAVA_HOME in root's ~/.bash_profile.