open up google-vm ports

18 days ago

UPDATE: target tag does not seem to work, but "Apply to all" does!

I have had great difficulty getting google-vm to open a port.

my big "struggle/mistake" was the name of the network "target" - it should be "Apply to all".

This value should either be "Apply to all" (or MAYBE specify the name of the google-vm??)

this article is very comprehensive

it proves a little "tricky" to get to the network area:

this is where it HAS to say "Apply to all": (i never did get the target-name working!)


 ls -l | ncat  -l  10000 ;   ## this simple example will pass the results of the "ls" command out port 10000 then exit.

 telnet  10000; ## this client command should display the directory contents then exit.
ncat examples

To display open server ports:
netstat --listening  --numeric  --tcp  --udp;  ## displays open ports
netstat --listening  --numeric  --tcp  --udp;  ## displays open ports (deprecated)
Mark Edwards



zfs on Rocky-Linux

25 days ago

John Q:

That looks like lvm, which is a fine method. I’ve used lvm in the past, and don’t have any complaints on it except I prefer zfs over lvm.

dnf localinstall ;
gpg —import —import-options show-only /etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux ;
dnf config-manager —disable zfs ;
dnf config-manager —enable zfs-kmod ;
dnf install zfs ;
zpool create test raidz sdb sdc sdd sde ;

untested, i am not sure using zfs is worth the trouble.


Mark Edwards



taking an ISO file from VirtualBox to Google-VM

120 days ago

Instructions to create a VirtualBox-VM on a Windows box and convert it into a Google-VM

prerequisites: (i choose centos-8) (may not be necessary)  - GoogleCloudSDKInstaller.exe

1) create a virtualbox-vm install to be transferred to google-vm

creation: - EXACT gigabyte, like 10, 20  qcow(?) (copy on right)

    settings: - System, Motherboard, disable floppy (not sure if this is necessary) - System, Processor, Enable PAE/NX (may be already enabled) - Storage, “Empty”, click the little CD icon (right) and select your ISO file attach ISO file to the virtual cd drive - Audio, disable audio (not sure if this is necessary ?) - network: ADVANCED — paravirtualized network (virtio-net)

2) start VirtualBox-vm (i had to verify my CD(optical) boot disk)
    during install: - Under “Software Selection” i choose “minimal functionality” - Under Device Destination, i had to CLICK TWICE my ATA-VBOX-HARDDISK - under NETWORK, click “CONFIGURE” button, “General” tab, and select “Connect automatically with priority” - also under NETWORK, i like to make sure the network is working, there is an ON_OFF slider and you should be issued an IP number which you can verify - Centos-8 requires you to set the root password (dont forget it!) - Click “Begin Installation” button

2) stop virtualbox-vm Power off the machine, do not select “reboot”

3) settings, Storage, remove ISO from virtual cd

4) boot up your new virtualbox-vm

(optional) dnf —assumeyes install vsftpd; systemctl enable vsftpd; systemctl start vsftpd ; systemctl stop firewalld ; ## or three below: firewall-cmd —zone=public —permanent —add-port=21/tcp ; firewall-cmd —zone=public —permanent —add-service=ftp ; firewall-cmd —reload ;

5a) new /etc/default/grub file:

### W-O-R-K-I-N-G GRUB
### to compile:
### grub2-mkconfig —output=/boot/grub2/grub.cfg ;
GRUB_DISTRIBUTOR=”$(sed ‘s, release .*$,,g’ /etc/system-release)”
##GRUB_CMDLINE_LINUX=“crashkernel=auto resume=/dev/mapper/cl-swap rhgb quiet”
GRUB_CMDLINE_LINUX=“console=ttyS0,38400n8d crashkernel=auto resume=/dev/mapper/cl-swap”

5b) chmod 644 /etc/default/grub;#### (just in case)

6) new new initramfs.bsh: (thank you Rich Halloway!)
echo ‘# Ensure Google Compute Engine drivers are built into initramfs’ >> /etc/dracut.conf.d/GCE.conf
echo -e “nadd_drivers+=” virtio_scsi virtio_blk virtio_net”“ >> /etc/dracut.conf.d/GCE.conf
echo ‘# Ensure AWS drivers are built into initramfs’ >> /etc/dracut.conf.d/AWS.conf
echo -e “nadd_drivers+=” xen-blkfront xen-netfront”“ >> /etc/dracut.conf.d/AWS.conf
echo ‘# Ensure AWS ENA drivers are built into initramfs’ >> /etc/dracut.conf.d/AWS-ENA.conf
echo -e “nadd_drivers+=” xen-blkfront xen-netfront nvme nvme-fabrics nvme-fc nvme-rdma nvme-fcloop nvme-loop nvmet-fc nvmet-rdma nvmet ena”“ >> /etc/dracut.conf.d/AWS-ENA.conf
kversion=$( rpm -q kernel | sed ‘s/kernel-//’ )
dracut -v -f “/boot/initramfs-${kversion}.img” “$kversion”

7) stop virtualbox-vm

8) use VirtualBox to convert vdi/qcow to a RAW file: cd  “Program Files“OracleVirtualBox VboxManage.exe   clonemedium      disk   “D:virtualboxcentos-8centos-8.vdi”   “D:virtualboxcentos-8disk.raw”  -format  RAW

9) turn RAW file to a TAR (tape-archive) file: (notice file names in quotes, thank you Ric Alloway) - cd to location of RAW file - “C:Program Files (x86)GnuWin32bintar” —verbose —create —sparse —file=“disk.tar” “disk.raw”

10) turn TAR file to a gzip file: “C:Program Files (x86)GnuWin32bingzip.exe” —verbose —stdout “disk.tar” > “disk.tar.gz”

11) upload your new disk.tar.gz file here:

12) – cloud shell: gcloud compute images create centos-project —project=marks-project —source-uri= —storage-location=us

13) create a new vm from this newly created image.

14) i was unable to log in using the webbrowser SSH command, but was able to no problems using PuTTy

OLD STUFF BELOW ============

1) create a VirtualBox-vm install to be transferred to google-vm – !! MINIMAL install l!

2) stop VirtualBox

3a) C:
3b) cd “Program Files“OracleVirtualBox
3c) VboxManage.exe clonemedium disk “D:virtualboxcentos-8-smallcentos-8-small.vdi” “D:virtualboxcentos-8-smalldisk.raw” -format RAW
3d) ignore “already exists” message…. maybe this is left over from before?

4) create NEW virtualbox install at least twice the size of the original

5) dnf -y install vsftpd; systemctl start vsftpd; systemctl stop firewalld; ##

6) using filezilla, ftp the disk.raw created into step three into the NEW Virtualbox

7) tar —verbose —format=oldgnu -cSzf disk.tar.gz disk.raw ; ## notice NO dot-slash prefix on the disk.raw file!

8) sftp disk.tar.gz back to desktop

9) upload disk.tar.gz to:;tab=objects?forceOnBucketsSortingFiltering=false&project=cockroachdb-147617&prefix=&forceOnObjectsSortingFiltering=false

10) gcloud compute images create centos-8-from-virtualbox-raw —project=cockroachdb-147617 —source-uri= —storage-location=us ;

gcloud beta compute —project=cockroachdb-147617 instances create instance-1 —zone=us-central1-a —machine-type=e2-medium —subnet=default —network-tier=PREMIUM —maintenance-policy=MIGRATE — —scopes=,,,,, —image=centos-8-from-virtualbox-raw —image-project=cockroachdb-147617 —boot-disk-size=16GB —boot-disk-type=pd-standard —boot-disk-device-name=instance-1 —reservation-affinity=any

OLD: VboxManage clonehd -format RAW ~/VirtualBox VMs/gce-demo/gce-demo.qcow ~/disk.raw
VboxManage clonemedium -format RAW ~/VirtualBox VMs/gce-demo/gce-demo.qcow ~/disk.raw

cd into this directory:
cd Program FilesOracleVirtualBox
VBoxManage.exe clonemedium disk “D:virtualboxcentos-8centos-8-a.vdi” “D:virtualboxcentos-8disk.raw” -format RAW
VBoxManage.exe clonemedium disk “D:virtualboxcentos-8centos-8-a.vdi” “D:virtualboxcentos-8disk.qcow” -format qcow
### qcow2 did NOT work….

#########7zip – create tar gzip file ( may need to create tar first than gzip [gz] file, or name format (dot)tar(dot)gz )
tar —verbose —format=oldgnu -cSzf gce-demo.tar.gz disk.raw ;

## create bucket here: ## copy the gzip file to the google cloud gsutil cp centos-8.RAW.tar.gz gs://virtualbox-gce-demo-bucket-name/cent0s-8.RAW.tar.gz gsutil cp centos-8-a.RAW.gz gs://centos-8-test/centos-8.RAW.gz ## OR JUST CLICK-DRAG….. ## create an image gcloud compute images create gce-demo —source=uri gs://virtualbox-gce-demo/cent0s-8.RAW.tar.gz

gcloud compute instances create gce-demo —image gce-demo —machine-type=standard-1 —zone us-central1-b

## change format variable to format ‘fixed’ (NOT PART OF THE PROCESS) VBoxManage.exe clonemedium disk “D:virtualboxcentos-8centos-8.vdi” “D:virtualboxcentos-8centos-8-a.vdi” -variant Fixed ## change format variable to format ‘fixed’ (NOT PART OF THE PROCESS)
Mark Edwards



getting MySQL Workbench working

185 days ago

go to and get IP number example:

SELECT User, Host FROM mysql.user WHERE 1 AND Host != ‘localhost’ ;
## optionally REMOVE:
DROP USER ‘MarkEdwards’@‘321.321.321.321’ ;

CREATE USER ‘MarkEdwards’@‘’ IDENTIFIED BY ‘MarksPassword’;


GRANT ALL PRIVILEGES ON `comptonPractice`.* TO ‘MarkEdwards’@‘’;


tcp|in|d=3306|s= ## CenturyLink Phoenix — 2021-01-30
d= – destination
s= – source ;-)

systemctl restart csf.service ; ## important???
systemctl restart iptables ; ## important ???
iptables —flush ; ## VERY IMPORTANT!!!!!!

Mark Edwards




277 days ago

important to get the CALLBACK correct:

Mark Edwards



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