Install VMware tools on Ubuntu VM

In Ubuntu the simplest way to install the VMware tools is through apt.

sudo apt-get install open-vmware-tools

Shouldn’t have to do anything else.

You can also install the tools by hitting Install VMware tools from either the web UI, or vShpere.  This will mount a virtual CD on the OS, you can then copy the contents to a local directory in the vm.  You can then proceed to install them by extracting the tar file with

tar -xzf VMware*

cd into the new directory

cd vmware*

and run

sudo ./vmware-install.pl

Ubuntu UniFi server running out of space on /run

Had an issue that /run was randomly running out of space which in turn would interfere with the unifi-video service causing it to run, but not record.

/run looks like a tmpfs or ramdisk that Ubuntu sets up.  So you can do a “temporary” fix by remounting the tmpfs with a larger size.  Example below.  If /run is a 2GB directory, you can remount changing the size from 2GB to 2.5GB.

sudo mount -t tmpsfs tmpfs /run -o remount,size=2500M

Note that it is a temporary fix and goes away after a reboot.

The issue ended up being that the WiFi UniFi controller was setup to auto backup everything once a week.  So as it was backing stuff up, it would eat up the available space in the tmpfs, think there may be an issue with the size of the UniFi data and maybe not being able to fit it all in RAM?

Running the following command

df -h --max=1 /var | sort

shows the following

1.1M /run/udev
2.5G /run/
2.5G /run/unifi   <-- UniFi controller
4.0K /run/initramfs
8.0K /run/network
12K /run/user
288K /run/samba
404K /run/systemd

Looking inside the unifi directory shows the following folders.  Looks like the they are temp files.

200M /run/unifi/ExpTmp351719567129045774
696M /run/unifi/ExpTmp3406220793759111216
1.6G /run/unifi/ExpTmp3368400690321364109
0 /run/unifi/work
2.5G /run/unifi

Running an ls inside the folder shows

-rw-r----- 1 unifi unifi 13971807 Jul 2 02:30 db.gz
-rw-r----- 1 unifi unifi 1665223462 Jul 2 02:56 db_stat.gz

Looking inside the UniFi controller it is set to auto backup on Monday at 2:30AM

Looks like “/run/unifi” is used as a temporary folder to create the backups and when it is completed converts it to a .unf file and moves it to “/usr/lib/unifi/data/backup/autobackup/”  So the left over temp files were never completed or something caused them to stop working.  Maybe the backup was big enough to take up all the tmpfs space and cause the backup to fail.

Resolution.  To fix the problem I turned the data retention down to a week and deleted the temp files in /var/unifi.  Had to sudo su to root.  sudo wasn’t cutting it for some reason.

sudo su
rm -rf /var/unifi/Exp*
exit

Should be all good now.

Delete SNMPv3 User on Linux

Don’t know if this is the recommended way to delete a user, but it seems to work.

sudo service snmpd stop

Open up the snmpd.conf file in /var/lib and find the line with the SNMP user and delete the line

sudo vi /var/lib/snmp/snmpd.conf

Save, exit, and start snmpd

sudo service snmpd start

These steps work for Ubuntu, but should work for any Debain based distro as well as CentOS, Fedora, RedHat etc.

Install Ubiquiti UNMS on Ubuntu

Ubiquiti UNMS installation instructions link

https://github.com/Ubiquiti-App/UNMS/wiki/Installation-%26-Update

Download and Install UNMS

curl -fsSL https://raw.githubusercontent.com/Ubiquiti-App/UNMS/master/install.sh > /tmp/unms_install.sh && sudo bash /tmp/unms_install.sh

Run the following commands as root.  Use sudo su if needed.

Set over commit to 1

echo "vm.overcommit_memory=1" >>/etc/sysctl.conf
sysctl -p

Disable Transparent HugePages

echo never > /sys/kernel/mm/transparent_hugepage/enabled

Add this to /etc/rc.local above the exit line

if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
   echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi

Finish the installation in your browser
https://unms_server_address

Auto mount CIFS mount point on system startup on Ubuntu

Install CIFS utils

sudo apt-get install -y cifs-utils

You can manually test it with the following command.  Change the ip address, mount points, username, and password.

mount.cifs /192.168.1.102/mount/point /mnt -o user=john,pass=password3,uid=john

Note that specifying the uid in the options, allows the user to add, delete, and modify the files and folders of that specific mount point.

To auto mount on system startup, add the following line to /etc/fstab.  Change the appropriate lines.

//192.168.1.102/mount/point   /mnt  auto   user=john,pass=password3,uid=john   0   0

You can test it by mounting everything in fstab

sudo mount -a

Install UniFi Video 3.8.5 on Ubuntu or Debian

You can run all the commands from the terminal, or ssh into the server

See here if you need to setup SSH on the server.

Install prerequisites

sudo apt-get install mongodb mongodb-server openjdk-8-jre-headless jsvc

Download UniFi Video installer

Note the Debian package works on Ubuntu, and has been tested on the latest Ubuntu

wget https://dl.ubnt.com/firmwares/ufv/v3.8.5/unifi-video.Debian7_amd64.v3.8.5.deb

Install package

sudo dpkg -i unifi-video.Debian7_amd64.v3.8.5.deb

Login to the UniFi Video controller using your web browser and going to the following address to finish configuring the NVR.

https://your-server-address:7443

Install SSH Server on Linux (Debian, Ubuntu, Fedora, CentOS, RedHat)

Debian / Ubuntu

sudo apt-get install -y openssh-server

RPM based Distros, Fedora / CentOS / RedHat

sudo dnf install -y openssh-server

or use yum

sudo yum install -y openssh-server

Start ssh service

sudo systemctl start sshd

By default the SSH service should start when the system starts, but if not try the following command to enable the service on boot up.

Debian / Ubuntu

systemctl enable ssh

Fedora, CentOS, RedHat

systemctl enable sshd

Change SSH port

Not necessary, but it is a good idea to change the default ssh port.  To change the port edit the sshd file.

vi /etc/ssh/sshd_config

If you change the port, you’ll need to allow it in the firewall (firewalld, iptables) and if SELinux is enabled, semanage.