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30.4. Examining Temporary(/tmp) Space

The Oracle Universal Installer requires up to 400 MB of free space in the /tmp directory.
To find out the space in /tmp, run: 
$ df /tmp
If you do not have enough space in the /tmp directory, you can temporarily create a tmp directory in another file system. Here are the steps for doing it: 
su - root
mkdir /<AnotherFilesystem>/tmp
chown root.root /<AnotherFilesystem>/tmp
chmod 1777 /<AnotherFilesystem>/tmp
export TEMP=/<AnotherFilesystem>
export TMPDIR=/<AnotherFilesystem>
The TEMP=/<AnotherFilesystem> file is used by Oracle. The TMPDIR=/<AnotherFilesystem> file is used by Linux programs like the linker "ld".
When you are done with your Oracle installation, shut down Oracle and remove the temporary directory: 
su - root
rmdir /<AnotherFilesystem>/tmp
unset TEMP
unset TMPDIR