I am supposed to set the EC2_HOME and JAVA_HOME variables before running a command (ec2-describe-regions)
How do I do that in one go?
3 Answers
You can one-time set vars for a single command by putting them on the command line before the command:
$ EC2_HOME=/path/to/dir JAVA_HOME=/other/path ec2-describe-regions Alternately, you can export them in the environment, in which case they'll be set for all future commands:
$ export EC2_HOME=/path/to/dir $ export JAVA_HOME=/other/path $ ec2-describe-regions If you want to use the environment variables multiple times in the same session you can use:
export VAR1=value1 VAR2=value2 VARN=valueN If you want to execute a command with multiple variables without affecting the current bash session, you can use:
VAR1=value1 VAR2=value2 VARN=valueN command arg=1 As other *nix system, you can add function as following in your .bashrc file under your HOME directory.
function startec2(){ export EC2_HOME=/path/to/dir export JAVA_HOME=/other/path ec2-describe-regions } Now, you can start your program by the following command:
startec2 
