diff --git a/esxi/readme.md b/esxi/readme.md
index 427b04a..90818c2 100644
--- a/esxi/readme.md
+++ b/esxi/readme.md
@@ -5,7 +5,7 @@
 
 Type 1 hypervisor hosting virtual machines, running straight on metal.
 
-# Files and directory structure
+# Basic settings
 
 https://www.dbappweb.com/2020/08/20/how-to-change-the-default-gateway-for-vmware-vsphere-esxi/
 
@@ -18,12 +18,128 @@ https://blog.techygeekshome.info/2021/04/vmware-esxi-esxcli-commands-to-update-h
 * esxcli network ip dns server remove --server=1.1.1.1
 * esxcli network ip dns server list
 
-# docker-compose
+# Backups using ghettoVCB
 
-# Config
+* [github](https://github.com/lamw/ghettoVCB)
+* [documentation](https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Documents/ghettoVCB-sh-Free-alternative-for-backing-up-VM-s-for-ESX-i-3-5/ta-p/2773570)
+
+The script makes snapshot of a VM, copies the "old" vmdk and other files
+to a backup location, then deletes the snapshot.<br>
+The space use of this approach where every version takes up lot of space
+can be an issue, maybe solved by backup datastore having deduplication,
+but thats maybe for the future.
+
+VMs that have any existing snapshot wont get backed up.
+
+### Backup storage locations
+
+* Local disk datastore
+* NFS share<br>
+  For nfs share on trueNAS scale
+  * Maproot User -> root
+  * Maproot Group -> nogroup
+
+Note the exact path from webgui of your datastore for backups.<br>
+Looks like this `/vmfs/volumes/6187f7e1-c584077c-d7f6-3c4937073090`
+
+### Install
+
+* ssh in to esxi
+* `cd /tmp`
+* `esxcli network firewall ruleset set -e true -r httpClient`
+* `wget https://github.com/lamw/ghettoVCB/releases/download/2021_10_20/vghetto-ghettoVCB.vib --no-check-certificate`
+* `esxcli software vib install -v /tmp/vghetto-ghettoVCB.vib -f`
+* check `ls /opt`
+
+### Config and preparation
+
+Gotta know basics how to edit files with ancient `vi`
+
+* Config file template is in `/opt/ghettovcb/ghettoVCB.conf`<br>
+  Make copy of it `cp /opt/ghettovcb/ghettoVCB.conf /opt/ghettovcb/ghetto_1.conf`<br>
+* Only edit this file, for starter setting where to copy backups<br>
+  `vi /opt/ghettovcb/ghetto_1.conf`<br>
+  `VM_BACKUP_VOLUME=/vmfs/volumes/6187f7e1-c584077c-d7f6-3c4937073090/Backups`
+* Create a file that will contain list of VMs to backup<br>
+  `touch /opt/ghettovcb/vms_to_backup_list`<br>
+  `vi /opt/ghettovcb/vms_to_backup_list`<br>
+  ```
+  OPNsense
+  Arch-Docker-Host
+  ```
+* Create a shell script that starts ghetto script using this config for listed VMs<br>
+  `touch /opt/ghettovcb/bin/ghetto_run.sh`<br>
+  `vi /opt/ghettovcb/bin/ghetto_run.sh`<br>
+  ```
+  #!/bin/sh
+
+  /opt/ghettovcb/bin/ghettoVCB.sh \
+      -g /opt/ghettovcb/ghetto_1.conf \
+      -f /opt/ghettovcb/vms_to_backup_list \
+      &> /dev/null
+  ```
+  Make the script executable<br>
+  `chmod +x /opt/ghettovcb/bin/ghetto_run.sh`
+* for my use case where TrueNAS VM cant be snapshoted while running because
+  of a passthrough pcie HBA card there needs to be another config
+* Make new config copy<br>
+  `cp /opt/ghettovcb/ghetto_1.conf /opt/ghettovcb/ghetto_2.conf`
+* Edit the config, setting it to shut down VMs before backup.<br>
+  `vi /opt/ghettovcb/ghetto_2.conf`<br>
+  `POWER_VM_DOWN_BEFORE_BACKUP=1`
+* edit the run script, add another execution for specific VM using ghetto_2.conf<br>
+  `vi /opt/ghettovcb/bin/ghetto_run.sh`<br>
+  ```
+  #!/bin/sh
+
+  /opt/ghettovcb/bin/ghettoVCB.sh \
+      -g /opt/ghettovcb/ghetto_1.conf \
+      -f /opt/ghettovcb/vms_to_backup_list \
+      &> /dev/null
+
+  /opt/ghettovcb/bin/ghettoVCB.sh \
+      -g /opt/ghettovcb/ghetto_2.conf \
+      -m TrueNAS_scale \
+      &> /dev/null
+  ```
+
+### Execution and scheduled runs
+
+To simply execute:
+
+* `/opt/ghettovcb/bin/ghetto_run.sh`
 
 
-# Logging
+To execute it periodicly cron is used.
 
+* Make backup of roots crontab<br>
+  `cp /var/spool/cron/crontabs/root /var/spool/cron/crontabs/root.backup`
+* Edit roots crontab to execute the run script at 4:00<br>
+  add the following line at the end in [cron format](https://crontab.guru/)<br>
+  `vi /var/spool/cron/crontabs/root`
+  ```
+  0    4    *   *   *   /opt/ghettovcb/bin/ghetto_run.sh
+  ```
+  To save read only file in vi use `:wq!`
+
+
+Logs about backups are in `/tmp`
+
+# disk reclamation
+
+
+# Switching from Thick to Thin disks
+
+
+vmkfstools --punchzero "./TrueNAS_scale-thin.vmdk"
+
+unmap, windows, `fsck_ufs -Ey /dev/da0p3`
+
+# links
+
+* https://www.altaro.com/vmware/ghettovcb-back-up-vms/
+* https://www.youtube.com/watch?v=ySMitWnNxp4
+* https://forums.unraid.net/topic/30507-guide-scheduled-backup-your-esxi-vms-to-unraid-with-ghettovcb/
+* https://blog.kingj.net/2016/07/03/how-to/backing-up-vmware-esxi-vms-with-ghettovcb/
 
 #### email