Add/Remove port in Linux firewall

Add port in firewall-cmd
===============================

[root@localhost ~]# firewall-cmd --zone=public --add-port=1521/tcp --permanent
success
[root@localhost ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources:
  services: ssh dhcpv6-client
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[root@localhost ~]# firewall-cmd --reload
success
[root@localhost ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources:
  services: ssh dhcpv6-client
  ports: 1521/tcp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[root@localhost ~]#

Remove port from Firewall 
===================================

[root@localhost ~]# firewall-cmd --zone=public --remove-port=1521/tcp --permanent
success
[root@localhost ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources:
  services: ssh dhcpv6-client
  ports: 1521/tcp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[root@localhost ~]# firewall-cmd --reload
success
[root@localhost ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp0s3
  sources:
  services: ssh dhcpv6-client
  ports:
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

[root@localhost ~]#

RMAN Incremental Level 1 backup with out Level 0 backup

 Incremental Level 1 backup with out Level 0 backup

level 1 incremental backup can be either of the following types:

Differential backup:  

Its backs up all blocks changed after the most recent incremental backup at level 1 or 0

 Cumulative backup : 

Its backs up all blocks changed after the most recent incremental backup at level 0






RMAN> list backup;

specification does not match any backup in the repository

RMAN>

RMAN>

RMAN> backup incremental level 1 database;

Starting backup at 30-APR-19
using channel ORA_DISK_1
no parent backup or copy of datafile 1 found
no parent backup or copy of datafile 3 found
no parent backup or copy of datafile 4 found
no parent backup or copy of datafile 7 found
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u01/app/oracle/oradata/IND/system01.dbf
input datafile file number=00003 name=/u01/app/oracle/oradata/IND/sysaux01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/IND/undotbs01.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/IND/users01.dbf
channel ORA_DISK_1: starting piece 1 at 30-APR-19
channel ORA_DISK_1: finished piece 1 at 30-APR-19
piece handle=/u01/app/oracle/product/18.0.0/db/dbs/IND/backupset/2019_04_30/o1_mf_nnnd0_TAG20190430T171432_gdjf91z7_.bkp tag=TAG20190430T171432 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:03:27
channel ORA_DISK_1: starting incremental level 1 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 30-APR-19
channel ORA_DISK_1: finished piece 1 at 30-APR-19
piece handle=/u01/app/oracle/product/18.0.0/db/dbs/IND/backupset/2019_04_30/o1_mf_ncsn1_TAG20190430T171432_gdjfhrcq_.bkp tag=TAG20190430T171432 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 30-APR-19

RMAN>


RMAN>

RMAN>

RMAN> list backup summary;


List of Backups
===============
Key     TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
------- -- -- - ----------- --------------- ------- ------- ---------- ---
9       B  0  A DISK        30-APR-19       1       1       NO         TAG20190430T171432
10      B  1  A DISK        30-APR-19       1       1       NO         TAG20190430T171432

RMAN>

Disable firewall in Linux

Disable firewall in Linux

Stop the firewall using root user



[root@grac43 ~]# service iptables status

iptables: Firewall is not running.

[root@pri ~]#
[root@pri ~]# chkconfig --list  | egrep 'iptables|ip6tables|libvirt'
ip6tables       0:off   1:off   2:on    3:on    4:on    5:on    6:off
iptables        0:off   1:off   2:on    3:on    4:on    5:on    6:off
libvirt-guests  0:off   1:off   2:on    3:on    4:on    5:on    6:off
libvirtd        0:off   1:off   2:off   3:on    4:on    5:on    6:off
[root@pri ~]#
[root@pri ~]#
[root@pri ~]# chkconfig libvirtd off
[root@pri ~]# chkconfig libvirt-guests off
[root@pri ~]# chkconfig ip6tables off
[root@pri ~]# chkconfig iptables off
[root@pri ~]# chkconfig --list  | egrep 'iptables|ip6tables|libvirt'
ip6tables       0:off   1:off   2:off   3:off   4:off   5:off   6:off
iptables        0:off   1:off   2:off   3:off   4:off   5:off   6:off
libvirt-guests  0:off   1:off   2:off   3:off   4:off   5:off   6:off
libvirtd        0:off   1:off   2:off   3:off   4:off   5:off   6:off
[root@pri ~]#
[root@pri ~]#


reboot the system using init 6 

[root@pri ~]# init 6
[root@pri ~]#
login as: oracle
oracle@192.168.43.68's password:
Last login: Fri Apr 12 17:36:20 2019 from 192.168.43.70
[oracle@pri ~]$
[oracle@pri ~]$
[oracle@pri ~]$
[oracle@pri ~]$ su - root
Password:
[root@pri ~]#
[root@pri ~]# service iptables status
iptables: Firewall is not running.
[root@pri ~]# chkconfig --list  | egrep 'iptables|ip6tables|libvirt'
ip6tables       0:off   1:off   2:off   3:off   4:off   5:off   6:off
iptables        0:off   1:off   2:off   3:off   4:off   5:off   6:off
libvirt-guests  0:off   1:off   2:off   3:off   4:off   5:off   6:off
libvirtd        0:off   1:off   2:off   3:off   4:off   5:off   6:off
[root@pri ~]#