Day: October 28, 2020

runlevel returns “unknown” on Oracle Linux 7

systemd has replaced SysVinit as the default service manager in Oracle Linux 7 (RHEL 7), but for the backward compatibility reason, the runlevel command is still available and it is a symbolic link to systemctl. Some old programs relies on the return result of runlevel to continue such as Oracle 12c installation prerequisite checks. I … Continue reading runlevel returns “unknown” on Oracle Linux 7 →

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OPatch needs exec option on /tmp

I was installing Oracle 12c release 1 on a Oracle Linux 6 system yesterday and it failed when patching Oracle with PSU#190716. I've done this many times and haven't seen any issues. In the log, it showed following errors: Start OOP by Prereq process. Launch OOP… /opt/oracle/121020/OPatch/opatch: line 1397: /tmp/oracle-home-160383738077277/OPatch/opatch: Permission denied /opt/oracle/121020/OPatch/opatch: line 1397: … Continue reading OPatch needs exec option on /tmp →