To install ASM and Oracle 11 R2 on SUSE Linux 11. The pre-installation requires:

Set the Oracle Grid Infrastructure software owner user default file mode creation mask (umask) to 022 in the shell startup file. Setting the mask to 022 ensures that the user performing the software installation creates files with 755 permissions.

Set ulimit settings for file descriptors and processes for the Oracle Grid Infrastructure installation software owner.

Set the DISPLAY environment variable in preparation for installation.

Which file should contain such information so that I can make a modification?