Import certificate into Java keystore

The below example involves importing a Zscaler root CA certificate into the java keystore on my Slackware installation.

sudo keytool -import -trustcacerts -alias zscaler -file /etc/ssl/certs/Zscaler-Dalzell.crt -keystore /opt/jdk1.8.0_341/jre/lib/security/cacerts
 

Linux boot and shutdown times

 

To find the last boot time, can of course do w which will show us how long the system has been up, but to save the mental arithmetic, we can do:

who -b or uptime -s

To find the last shutdown time, we can do:

last -x | grep shutdown or last -x | grep reboot (output varies between distributions)

Information from SHOW SLAVE STATUS on mysql

SHOW SLAVE STATUS\G;

UEFI, EFI, elilo and Slackware

 I recently came across a system that would not allow me to use legacy boot, so...

Convert gamma system server to virtual box vm

 This is a work in progress...

Kill a process on OpenVMS

show system

stop/id=nnnn (where nnnn is the PID from the above command)

Restarting processes on Alpha

 

Reset Windows password

Reset Windows password

Adding a PATH variable on the Mac

We can modify the /etc/paths file or we can create a file under /etc/paths.d such as /etc/paths.d/docker

which could contain;

~/.docker/bin

where the docker bin was located at /Users/my_username/.docker/bin

See also [here] for an example of adding JAVA to the System PATH in Linux.

Install command line tools on Mac

xcode-select --install