sqlplus backspace – ^H, delete – [[D^, add command history

Problem:

In sqlplus, pressing backspace writes ^H and delete – [[D^. Your terminal settings affects keyboard behaviour in sqlplus.

Let’s improve our sqlplus – make backspace and delete keys work as expected and in addition to this let’s add a new feature such as maintaining command history.

Solution:

Install a readline wrapper (rlwrap) – it maintains a separate input history for each command.

[root@rac1 ~]# yum install rlwrap -y 

Create alias for sqlplus in /etc/profile:

alias sqlplus='rlwrap sqlplus' 

Reconnect to the terminal and check that alias is created:

[oracle@rac1 ~]$ alias
alias egrep='egrep --color=auto'
alias fgrep='fgrep --color=auto'
alias grep='grep --color=auto'
alias l.='ls -d .* --color=auto'
alias ll='ls -l --color=auto'
alias ls='ls --color=auto'
alias sqlplus='rlwrap sqlplus'
alias vi='vim'
alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'

Connect to sqlplus:

[oracle@rac1 ~]$ sqlplus / as sysdba
SQL> 

And test your new sqlplus 🙂 :

Use backspace, delete, execute some command and then press arrow up to see previous command.

Patch Planner to check and request conflict patches

Problem:

Recently, I was applying p29963428_194000ACFSRU_Linux-x86-64.zip on top of 19.4 GI home and got the following error:

==Following patches FAILED in analysis for apply:
 Patch: /u01/swtmp/29963428/29963428
 Log: /u01/app/19.3.0/grid/cfgtoollogs/opatchauto/core/opatch/opatch2019-08-07_10-07-56AM_1.log
 Reason: Failed during Analysis: CheckConflictAgainstOracleHome Failed, [ Prerequisite Status: FAILED, Prerequisite output: 
 Summary of Conflict Analysis:
 There are no patches that can be applied now.
 Following patches have conflicts. Please contact Oracle Support and get the merged patch of the patches : 
 29851014, 29963428
 Conflicts/Supersets for each patch are:
 Patch : 29963428
 Bug Conflict with 29851014 Conflicting bugs are: 29039918, 27494830, 29338628, 29031452, 29264772, 29760083, 28855761 ... 
 After fixing the cause of failure Run opatchauto resume

Solution:

Oracle MOS note ID 1317012.1 describes steps how to check such conflicts and request conflict/merged patches in previous:

1. Run lsinventory from the target home:

[grid@rac1 ~]$ /u01/app/19.3.0/grid/OPatch/opatch lsinventory > GI_lsinventory.txt

2. Logon to support.oracle.com -> Click the “Patch and Updates” tab -> Enter the patch number you want to apply:

2. Click Analyze with OPatch…

3. Attach GI_lsinventory.txt file created in the first step and click “Analyze for Conflict”:

4. Wait for a while and you will see the result. According to it, patch 29963428 conflicts with my current patches:

From the same screen I can “Request Patch”.

5. After clicking “Request Patch” button I got the following error:

Click “See Details”:

The message actually means that fix for the same bug is already included in currently installed 19.4.0.0.190716ACFSRU.

So I don’t have to apply 29963428 patch. I wanted to share the steps with you , because the mentioned tool is really useful.

Install TFA v19.2.1 as Daemon in cluster

Installing TFA as root is preferable, because you will have enhanced capabilities. Such as:

  • Automatic diagnostic collections
  • Collections from remote hosts
  • Collecting of files which are not readable by Oracle software owner such as /var/log/messages or clusterware daemon logs

Download the newest Oracle Trace File Analyzer zip from Doc ID 1513912.1 ( for simplicity you can use wget ):

# wget --http-user=<Your OTN username> "https://updates.oracle.com/Orion/Services/download/TFA-LINUX_v19.2.1.zip?aru=22891540&patch_file=TFA-LINUX_v19.2.1.zip" -O TFA-LINUX_v19.2.1.zip --ask-password
Password: <Your OTN user password>

Setup passwordless ssh user equivalency for root user to all nodes:

[root@rac1 install]# ssh-keygen -t rsa <press Enter on each question>
[root@rac2 install]# ssh-keygen -t rsa <press Enter on each question> 

Copy content of /root/.ssh/id_rsa.pub from rac1 and paste into /root/.ssh/authorized_keys on rac2. Repeat the same for rac2.

Please make sure that the parameter PermitRootLogin yes exists in /etc/ssh/sshd_config file.

Check ssh equivalency:

[root@rac1 install]# ssh rac2 date
 Tue Aug  6 10:37:07 UTC 2019

[root@rac2 .ssh]# ssh rac1 date
 Tue Aug  6 10:37:34 UTC 2019

Unzip file and run the installTFA command ( bolded texts are answers to TFA installation questions, other text is only installation log):

[root@rac1 install]# unzip TFA-LINUX_v19.2.1.zip
[root@rac1 install]# ll
 total 518220
 -rwxr-xr-x 1 root root 265898937 Apr 25 18:44 installTFA-LINUX
 -rw-r--r-- 1 root root      1460 Apr 25 18:09 README.txt
 -rw-r--r-- 1 root root 264751391 Apr 25 19:18 TFA-LINUX_v19.2.1.zip

[root@rac1 install]# ./installTFA-LINUX 

TFA Installation Log will be written to File : /tmp/tfa_install_27153_2019_08_06-10_40_07.log
Starting TFA installation
TFA Version: 192100 Build Date: 201904251105
Enter a location for installing TFA (/tfa will be appended if not supplied) [/sw/install/tfa]:
/u01/app/18.3.0/grid/tfa
Running Auto Setup for TFA as user root…
Would you like to do a [L]ocal only or [C]lusterwide installation ? [L|l|C|c] [C] : C
The following installation requires temporary use of SSH.
If SSH is not configured already then we will remove SSH when complete.
Do you wish to Continue ? [Y|y|N|n] [Y] Y
Installing TFA now…
Discovering Nodes and Oracle resources
Starting Discovery…
Getting list of nodes in cluster . . . . .
List of nodes in cluster:
rac1
rac2
Checking ssh user equivalency settings on all nodes in cluster
Node rac2 is configured for ssh user equivalency for root user
CRS_HOME=/u01/app/18.3.0/grid
Searching for running databases…
orcl 
Searching out ORACLE_HOME for selected databases…
Getting Oracle Inventory…
ORACLE INVENTORY: /u01/app/oraInventory
Discovery Complete…
TFA Will be Installed on the Following Nodes:
++++++++++++++++++++++++++++++++++++++++++++
Install Nodes
rac1
rac2
Do you wish to make changes to the Node List ? [Y/y/N/n] [N] N
TFA will scan the following Directories
++++++++++++++++++++++++++++++++++++++++++++
.-------------------------------------------------------------------------.
|                                   rac1                                  |
+--------------------------------------------------------------+----------+
| Trace Directory                                              | Resource |
+--------------------------------------------------------------+----------+
| /u01/app/18.3.0/grid/cfgtoollogs                             | CFGTOOLS |
| /u01/app/18.3.0/grid/crs/log                                 | CRS      |
| /u01/app/18.3.0/grid/css/log                                 | CRS      |
| /u01/app/18.3.0/grid/evm/admin/logger                        | CRS      |
| /u01/app/18.3.0/grid/evm/log                                 | CRS      |
| /u01/app/18.3.0/grid/install                                 | INSTALL  |
| /u01/app/18.3.0/grid/inventory/ContentsXML                   | INSTALL  |
| /u01/app/18.3.0/grid/log                                     | CRS      |
| /u01/app/18.3.0/grid/network/log                             | CRS      |
| /u01/app/18.3.0/grid/opmn/logs                               | CRS      |
| /u01/app/18.3.0/grid/rdbms/log                               | ASM      |
| /u01/app/18.3.0/grid/srvm/log                                | CRS      |
| /u01/app/grid/cfgtoollogs                                    | CFGTOOLS |
| /u01/app/grid/crsdata/rac1/acfs                              | ACFS     |
| /u01/app/grid/crsdata/rac1/afd                               | ASM      |
| /u01/app/grid/crsdata/rac1/chad                              | CRS      |
| /u01/app/grid/crsdata/rac1/core                              | CRS      |
| /u01/app/grid/crsdata/rac1/crsconfig                         | CRS      |
| /u01/app/grid/crsdata/rac1/crsdiag                           | CRS      |
| /u01/app/grid/crsdata/rac1/cvu                               | CRS      |
| /u01/app/grid/crsdata/rac1/evm                               | CRS      |
| /u01/app/grid/crsdata/rac1/output                            | CRS      |
| /u01/app/grid/crsdata/rac1/trace                             | CRS      |
| /u01/app/grid/diag/apx/+apx                                  | ASMPROXY | 
| /u01/app/grid/diag/apx/+apx/+APX1/cdump                      | ASMPROXY |
| /u01/app/grid/diag/apx/+apx/+APX1/trace                      | ASMPROXY |
| /u01/app/grid/diag/asm/+asm/+ASM1/cdump                      | ASM      |
| /u01/app/grid/diag/asm/+asm/+ASM1/trace                      | ASM      |
| /u01/app/grid/diag/asmtool/user_grid/host_2173698417_110/cdu | ASMTOOL  |
| /u01/app/grid/diag/asmtool/user_grid/host_2173698417_110/tra | ASM      |
| /u01/app/grid/diag/clients/user_grid/host_2173698417_110/cdu | DBCLIENT |
| /u01/app/grid/diag/clients/user_grid/host_2173698417_110/tra | DBCLIENT |
| /u01/app/grid/diag/crs/rac1/crs/cdump                        | CRS      |
| /u01/app/grid/diag/crs/rac1/crs/trace                        | CRS      |
| /u01/app/grid/diag/rdbms/_mgmtdb/-MGMTDB/cdump               | RDBMS    |
| /u01/app/grid/diag/rdbms/_mgmtdb/-MGMTDB/trace               | RDBMS    |
| /u01/app/grid/diag/tnslsnr/rac1/listener/cdump               | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener/trace               | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan1/cdump         | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan1/trace         | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan2/cdump         | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan2/trace         | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan3/cdump         | TNS      |
| /u01/app/grid/diag/tnslsnr/rac1/listener_scan3/trace         | TNS      |
| /u01/app/oraInventory/ContentsXML                            | INSTALL  |
| /u01/app/oraInventory/logs                                   | INSTALL  |
| /u01/app/oracle/cfgtoollogs                                  | CFGTOOLS |
| /u01/app/oracle/diag/clients/user_oracle/host_2173698417_110 | DBCLIENT |
| /u01/app/oracle/diag/clients/user_oracle/host_2173698417_110 | DBCLIENT |
| /u01/app/oracle/diag/rdbms/orcl/orcl1/cdump                  | RDBMS    |
| /u01/app/oracle/diag/rdbms/orcl/orcl1/trace                  | RDBMS    |
| /u01/app/oracle/diag/tnslsnr                                 | TNS      |
| /u01/app/oracle/product/18.3.0/dbhome_1/cfgtoollogs          | CFGTOOLS |
| /u01/app/oracle/product/18.3.0/dbhome_1/install              | INSTALL  |
| com                                                          | ASM      |
'--------------------------------------------------------------+----------'
Installing TFA on rac1:
HOST: rac1    TFA_HOME: /u01/app/18.3.0/grid/tfa/rac1/tfa_home
Installing TFA on rac2:
HOST: rac2    TFA_HOME: /u01/app/18.3.0/grid/tfa/rac2/tfa_home
.-------------------------------------------------------------------------.
| Host | Status of TFA | PID   | Port | Version    | Build ID             |
+------+---------------+-------+------+------------+----------------------+
| rac1 | RUNNING       | 28335 | 5000 | 19.2.1.0.0 | 19210020190425110550 |
| rac2 | RUNNING       | 31169 | 5000 | 19.2.1.0.0 | 19210020190425110550 |
'------+---------------+-------+------+------------+----------------------'
Running Inventory in All Nodes…
Enabling Access for Non-root Users on rac1…
Adding default users to TFA Access list…
Summary of TFA Installation:
.--------------------------------------------------------------.
|                             rac1                             |
+---------------------+----------------------------------------+
| Parameter           | Value                                  |
+---------------------+----------------------------------------+
| Install location    | /u01/app/18.3.0/grid/tfa/rac1/tfa_home |
| Repository location | /u01/app/grid/tfa/repository           |
| Repository usage    | 0 MB out of 10240 MB                   |
'---------------------+----------------------------------------'
.--------------------------------------------------------------.
|                             rac2                             |
+---------------------+----------------------------------------+
| Parameter           | Value                                  |
+---------------------+----------------------------------------+
| Install location    | /u01/app/18.3.0/grid/tfa/rac2/tfa_home |
| Repository location | /u01/app/grid/tfa/repository           |
| Repository usage    | 0 MB out of 10240 MB                   |
'---------------------+----------------------------------------'
TFA is successfully installed…