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Operating Systems Linux Red Hat How to switch back from Oracle Kernel to RedHat? Post 303022846 by Aia on Saturday 8th of September 2018 12:09:17 PM
Old 09-08-2018
Quote:
Originally Posted by prvnrk
I would like to know how can I switch from Oracle kernel to RHEL kernel without breaking anything.
Since there was no testing previously in an identical testing machine, this box has become the testing one now. No testing, no confidence in anything.
You can test if it doesn't break anything by rebooting and at the grub menu select the red Red Hat Enterprise Linux Server (3.10.0-862.9.1.el7.x86_64) 7.5 (Maipo). If it boots properly, check that if everything is what's expected. If everything is proper then change the entry in the grub.conf that says default=1 to default=2 which is the third kernel menu corresponding to that version of redhat supported kernel.
Perhaps it is easier to issue the command:
Code:
# grub2-set-default 2

That only makes the selection of which kernel to boot from, persistent on reboots and shutdowns.
Depending of the yum configuration there might be issues updating kernels, you might have to set it up to exclude kernels updates in from the oracle repo.
You might want to remove with yum or rpm the title Oracle Linux Server 7.5, with Unbreakable Enterprise Kernel 4.14.35-1818.0.9.el7uek.x86_64 and Oracle Linux Server 7.5, with Linux 3.10.0-862.11.6.el7.x86_64
A lot of testing.
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RADSQLRELAY(8)						     FreeRADIUS helper program						    RADSQLRELAY(8)

NAME
radsqlrelay - relay SQL queries to a central database server SYNOPSIS
radsqlrelay [-?] [-d sql_driver] [-b database] [-f file] [-h host] [-u user] [-P port] [-p password] [-1] [-x] file_path DESCRIPTION
radsqlrelay tails a SQL logfile and forwards the queries to a database server. Used to replicate accounting records to one (central) data- base, even if the database has extended downtime. The SQL logfile is created by the rlm_sql_log module. The module must be configured in the radiusd server before you can use radsqlrelay. OPTIONS
-? Print usage help information. -d sql_driver Driver to use: mysql, pg, oracle. -b database Name of the database to use. -f file Read password from file, instead of command line. -h host Connect to host. -u user User for login. -P port Port number to use for connection. -p password Password to use when connecting to server. -1 One-shot mode: push the file to database and exit. -x Turn on debugging. file_path The pathname of the SQL logfile to use. NOTES
Oracle driver The command "radsqlrelay -d oracle -b db.domain.tld sql-relay" reads the database description stored in $TNS_ADMIN/tnsnames.ora: db.domain.tld = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = db.domain.tld)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = <DB SID>) ) ) SEE ALSO
rlm_sql_log(5) AUTHOR
Nicolas Baradakis <nicolas.baradakis@cegetel.net> 19 June 2005 RADSQLRELAY(8)
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