crontab -e not opening correct editor

Open your .bashrc file and add the line export EDITOR=vim or do;

echo 'export EDITOR=vim' >> ~/.bashrc

Then logout and back in or source .bashrc

If this doesn't work, try adding it to .bash_profile or do;

echo 'export EDITOR=vim' >> ~/.bash_profile

and then again, logout and back in or do source .bash_profile

NOTE: We can test using echo $EDITOR

I think on is fine for when at the console and the other for remote sessions, maybe...

tcpdump

 TCPDUMP EXAMPLES

MariaDB Logging and old password support

For old password compatibility, do

SET GLOBAL old_passwords = 1;
SET PASSWORD FOR 'repl'@'%' = PASSWORD('the_password');
SET GLOBAL old_passwords = 0;

We can also try SET GLOBAL secure_auth=OFF; however I found this made no difference when running MariaDB 10.5 and attempting to connect with an old (presumable 4.1) client.

MariaDB GTID position reset

On Master, do SELECT @@gtid_current_pos;
then on Slave, do SET GLOBAL gtid_slave_pos = 'GTID_FROM_SERVER_1';

if need be do;

CHANGE MASTER TO
  MASTER_HOST='server1',
  MASTER_USER='replica_user',
  MASTER_PASSWORD='password',
  MASTER_USE_GTID=slave_pos;

then;

Start Slave;

SHOW SLAVE STATUS/G;

A note on the above, do it quickly, in case the position changes.

SELECT @@gtid_slave_pos, @@gtid_current_pos; should show the same.

Oracle timeouts

I had a problem with Oracle timeouts when connecting to a remote Oracle database server from within a php page. This resulted in the need to restart Apache to resolve as other web pages were also not available in said situations.

PCI Passthrough

WIP

Reboot and do: dmesg | grep -e DMAR -e IOMMU

[source]

[source]

fail2ban-client

An example of the fail2ban-client command would be:

fail2ban-client status filter-name 

where filter name is the name of a file in /etc/fail2ban/filter.d/

Netbeans build.xml file

 Below is a couple of additions I've made in the past to the build.xml files:

Creating a jar file, adding to, extracting and viewing the contents of...

To view the contents of a jar file:

jar tf jar-file.jar

To run a jar file:

java -jar jar-file.jar

Remote Monitor

Remote Monitor v:1.16h1

Proton-5 v:1.2