To be fair, the exception is fairly clear as to root cause: -
$ ./runInstaller -silent -responseFile ../db_install.rsp
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 120 MB. Actual 27474 MB Passed
Checking swap space: must be greater than 150 MB. Actual 4031 MB Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2014-07-07_04-07-06PM. Please wait ...[oracle@rhel6 database]$ [FATAL] [INS-10101] The given response file ../db_install.rsp is not found.
CAUSE: The given response file is either not accessible or do not exist.
ACTION: Give a correct response file location. (Note: relative path is not supported)
Checking Temp space: must be greater than 120 MB. Actual 27474 MB Passed
Checking swap space: must be greater than 150 MB. Actual 4031 MB Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2014-07-07_04-07-06PM. Please wait ...[oracle@rhel6 database]$ [FATAL] [INS-10101] The given response file ../db_install.rsp is not found.
CAUSE: The given response file is either not accessible or do not exist.
ACTION: Give a correct response file location. (Note: relative path is not supported)
Once I did it properly, all was well: -
$ ./runInstaller -silent -responseFile /mnt/hgfs/Software/Oracle/11gR2/db_install.rsp