Author Archives: admin

Auto Start VM after XenServer reboot

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SSH or gain command line access to XenServer

First we need to enable the Pool to allow auto starting
Second we will need to turn on the auto_poweron to true

In the following examples replace the UUIDs with your UUIDs

Find Pool UUID

You can find the pool UUID by running the “xe pool-list” Command. Note: you’ll still have a pool even if there is only a single server.

# xe pool-list
uuid ( RO) : 2e587aeb-de94-hf29-3eda-923d8he634fe

Enable auto_poweron for the pool

xe pool-param-set uuid=2e587aeb-de94-hf29-3eda-923d8he634fe other-config:auto_poweron=true

Verify that it is enabled

xe pool-param-list uuid=2e587aeb-de94-hf29-3eda-923d8he634fe  | grep auto_poweron

List VM UUID’s

Locate the UUID’s of the VM’s you want to start

# xe vm-list
uuid ( RO)           : 521be58a-3495-ea29-02a0-85ffcda06583
     name-label ( RW): CentOS 7
    power-state ( RO): running

Enable auto start

Run the following command for each VM you want to auto start. Change the UUID to the UUID of the vm you want to start.

xe pool-param-set uuid=521be58a-3495-ea29-02a0-85ffcda06583  other-config:auto_poweron=true

Print parameter settings

Use the following command to verify that the auto_poweron option is enabled.

xe vm-param-list uuid=521be58a-3495-ea29-02a0-85ffcda06583 | grep -i poweron | cut -d";" -f1

Example output

                      other-config (MRW): auto_poweron: true

https://support.citrix.com/article/CTX133910

Mikrotik RouterOS – “drop all from WAN not DSTNATed”

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The default DSTNATed firewall rule keeps traffic from the WAN accessing LAN side IP addresses.

More info here

Printing the rules on a router with the default config should show the following.

;;; defconf: drop all from WAN not DSTNATed
chain=forward action=drop connection-nat-state=!dstnat in-interface=ether1

If you are wanting to add the rule to a router, you can copy and past the following command. Replace in-interface=ether with your in interface.

/ip firewall add action=drop chain=forward comment=\ "defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat in-interface=ether1

LibreOffice Calc – Turn page breaks on and off

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Turning the Page break option on in LibreOffice Calc will show a dotted line in your Calc spreadsheet to show you if you printed it out where the boundaries would be.

Example showing page breaks in LibeOffice Calc. The dotted lines are the page outline

You can turn this behavior on or off by going to
Tools -> Options -> LibreOffice Calc -> View -> Visual Aids -> Page breaks
And turning the check box on or off

Example of Page breaks being on.

UNMS – Set user as Super Admin from command line

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The following commands can be run from a ssh session to your UNMS instance.

Show Current Users

sudo ~unms/app/unms-cli set-superadmin

Should get something like the following

            UNMS Users
 ┌─────────┬───────────┬───────────────────────────┬──────────────┬────────────┐
 │ (index) │ username  │           email           │     role     │ two-factor │
 ├─────────┼───────────┼───────────────────────────┼──────────────┼────────────┤
 │    0    │  'larry'  │  'larry@incredigeek.com'  │   'admin'    │   false    │
 │    1    │   'bob'   │   'bob@incredigeek.com'   │   'admin'    │   false    │
 └─────────┴───────────┴───────────────────────────┴──────────────┴────────────┘

Change User to Super Admin

To change a user to a Super Admin, add “–username username” to the above command.

Example:

sudo ~unms/app/unms-cli set-superadmin --username bob
            UNMS Users
 ┌─────────┬───────────┬───────────────────────────┬──────────────┬────────────┐
 │ (index) │ username  │           email           │     role     │ two-factor │
 ├─────────┼───────────┼───────────────────────────┼──────────────┼────────────┤
 │    0    │  'larry'  │  'larry@incredigeek.com'  │   'admin'    │   false    │
 │    1    │   'bob'   │   'bob@incredigeek.com'   │ 'superadmin' │   false    │
 └─────────┴───────────┴───────────────────────────┴──────────────┴────────────┘

Note that there does not appear to be a way to

UniFi Cameras – configure static IP or DHCP from command line

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The UniFi cameras are different then the AirMax line in how the configuration works. There is a “/tmp/system.cfg” file, but it does not contain most of the configuration option. In the default directory there are some files which appear to handle the device configuration.

The network configuration file is “ubnt_networkd.conf”

Edit the file by opening it up in vi or a different text editor.

Static IP config

{
     "cfgver": 2,
     "dhcp": {
         "fallbackIP": "192.168.1.20",
         "fallbackNetmask": "255.255.255.0",
         "status": 0  <-- 0=Static 1=DHCP
     },
     "dns": {
         "ns1": {
             "ip": "8.8.8.8",
             "status": 1
         },
         "ns2": {
             "ip": "4.2.2.2",
             "status": 1
         }
     },
     "routes": {
         "gateway": "192.168.5.1"
     },
     "statik": {
         "ip": "192.168.5.11",
         "netmask": "255.255.255.0"
     }
}

If you want to set the static address, you should be able to edit the settings in this config and leave DHCP status disabled.

DHCP config

To set the Camera to use DHCP, under dhcp change “”status”: 0″ to “”status”: 1″

{
     "cfgver": 2,
     "dhcp": {
         "fallbackIP": "192.168.1.20",
         "fallbackNetmask": "255.255.255.0",
         "status": 1
     },
     "dns": {
         "ns1": {
             "ip": "8.8.8.8",
             "status": 1
         },
         "ns2": {
             "ip": "4.2.2.2",
             "status": 1
         }
     },
     "routes": {
         "gateway": "192.168.5.1"
     },
     "statik": {
         "ip": "192.168.5.11",
         "netmask": "255.255.255.0"
     }
}

After the settings are applied the camera will use use DHCP regardless of the statik ip settings.

Save changes

Use the following command to write the changes to persistent storage

ubnt_cmd_persist.sh

And reboot the camera.

reboot

Camera should pull a DHCP address when it boots up

Ubiquiti set DHCP from command line

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Edit the “/tmp/system.cfg”

Change the line that contains “dhcpc.status=disabled” to

dhcpc.status=enabled

add the following lines

dhcpc.1.devname=br0         
dhcpc.1.fallback=192.168.1.20
dhcpc.1.fallback_netmask=255.255.255.0
dhcpc.1.status=enabled

Save and exit and save changes

/usr/etc/rc.d/rc.softrestart save

Log into the GUI and verify everything looks correct. Under the network tab it was still showing that it had a static address, although it pulled a DHCP IP.

Change Channel Width on Ubiquiti AC CPE Over SSH

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SSH into CPE

ssh ubnt@192.168.1.20

open up the “/tmp/system.cfg” file

vi /tmp/system.cfg

Find the “radio.1.chanbw=” line and change to the following

radio.1.chanbw=10

Note: it may say “radio.1.chanbw=0” that looks to be the default and works for 20mhz

exit file with 

esc + :wq + Return or Enter

Save settings with 

/usr/etc/rc.d/rc.softrestart save

Change AP to 10Mhz and the CPE should reconnect.