>Here the permissions on /var/opt/omni/tmp dir
>drwxrwxrwt 2 root sys 4096 Dec 2 17:02 tmp
>-rw-r----- 1 oracRMAD dba 5627904 Dec 2 17:01 rcvcat6567.exp
The above permissions (sticky bit) indicate only root and the file owner oracRMAD can remove that file.