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Linux
udev rules (for ASM) :
ENV{DM_VG_NAME}=="oradisksASM" ENV{DM_LV_NAME}=="DISK*" OWNER="oracle" GROUP="dba"
LVM :
lvdisplay --noheadings --units m -C -o Size /dev/db2vg/lv_RAW01
OpenSSL file encryption :
openssl aes-256-cbc -a -salt -in secrets.txt -out secrets.txt.enc
OpenSSL file decryption :
openssl aes-256-cbc -d -a -in secrets.txt.enc -out secrets.txt.new
Cluster
Install components [ALL NODES] :
yum -y install pcs pacemaker fence-agents-all
Set password of user hacluster [ALL NODES] :
passwd hacluster
Enable services [ALL NODES] :
systemctl start pcsd.service systemctl enable pcsd.service
Create authentication tokens [FROM PRIM. NODE] :
pcs cluster auth dbp04allx.unixguest.eu dbp26allx.unixguest.eu dbp05allx.unixguest.eu
Create cluster [FROM PRIM. NODE] :
pcs cluster setup --start --name HADR_ISM dbp04allx.unixguest.eu dbp26allx.unixguest.eu dbp05allx.unixguest.eu
Enable cluster services on boot [FROM PRIM. NODE] :
pcs cluster enable --all
List Services
You can list services in Linux as follows:
List services
[root@tain-cx-uatdb1 ~]# systemctl list-unit-files UNIT FILE STATE proc-sys-fs-binfmt_misc.automount static dev-hugepages.mount static dev-mqueue.mount static proc-fs-nfsd.mount static proc-sys-fs-binfmt_misc.mount static sys-fs-fuse-connections.mount static sys-kernel-config.mount static sys-kernel-debug.mount static tmp.mount disabled var-lib-nfs-rpc_pipefs.mount static brandbot.path enabled systemd-ask-password-console.path static systemd-ask-password-plymouth.path static systemd-ask-password-wall.path static session-1.scope static session-29975.scope static session-29979.scope static acpid.service enabled arp-ethers.service disabled auditd.service enabled auth-rpcgss-module.service static autofs.service disabled [email protected] enabled bacula-fd.service disabled blk-availability.service disabled brandbot.service static certmonger.service disabled console-getty.service disabled console-shell.service disabled [email protected] static cpupower.service disabled crond.service enabled dbus-org.freedesktop.hostname1.service static dbus-org.freedesktop.import1.service static dbus-org.freedesktop.locale1.service static dbus-org.freedesktop.login1.service static dbus-org.freedesktop.machine1.service static dbus-org.freedesktop.timedate1.service static dbus.service static debug-shell.service disabled dm-event.service static dnsmasq.service disabled dracut-cmdline.service static dracut-initqueue.service static dracut-mount.service static dracut-pre-mount.service static dracut-pre-pivot.service static dracut-pre-trigger.service static dracut-pre-udev.service static dracut-shutdown.service static ebtables.service disabled emergency.service static firewalld.service disabled fstrim.service static [email protected] enabled gssproxy.service disabled halt-local.service static initrd-cleanup.service static initrd-parse-etc.service static initrd-switch-root.service static initrd-udevadm-cleanup-db.service static ip6tables.service disabled iprdump.service disabled iprinit.service disabled iprupdate.service disabled iptables.service disabled irqbalance.service enabled kdump.service enabled kmod-static-nodes.service static lvm2-lvmetad.service static lvm2-lvmpolld.service static lvm2-monitor.service enabled [email protected] static messagebus.service static microcode.service enabled NetworkManager-dispatcher.service disabled NetworkManager-wait-online.service enabled NetworkManager.service disabled nfs-blkmap.service disabled nfs-config.service static nfs-idmap.service static nfs-idmapd.service static nfs-lock.service static nfs-mountd.service static nfs-rquotad.service disabled nfs-secure.service static nfs-server.service disabled nfs-utils.service static nfs.service disabled nfslock.service static ntpd.service disabled ntpdate.service disabled oddjobd.service enabled plymouth-halt.service disabled plymouth-kexec.service disabled