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Virtualizor error fetching interface information

Posted on January 21, 2021 (January 21, 2021) by ServerOk

When starting network in virtualizor server, i get following error

[root@virtual2 ~]# service virtnetwork start
eth0: error fetching interface information: Device not found
Error: No ip address found.
[root@virtual2 ~]#

[root@virtual2 ~]# service virtnetwork start

eth0: error fetching interface information: Device not found

Error: No ip address found.

[root@virtual2 ~]#

To fix this error, find the network interface name with command

[root@virtual2 ~]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 34:97:f6:00:11:1f brd ff:ff:ff:ff:ff:ff
3: natbr3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:d9:3c:1c brd ff:ff:ff:ff:ff:ff
4: natbr3-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master natbr3 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:d9:3c:1c brd ff:ff:ff:ff:ff:ff
[root@virtual2 ~]#

[root@virtual2 ~]# ip link

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000

link/ether 34:97:f6:00:11:1f brd ff:ff:ff:ff:ff:ff

3: natbr3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000

link/ether 52:54:00:d9:3c:1c brd ff:ff:ff:ff:ff:ff

4: natbr3-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master natbr3 state DOWN mode DEFAULT group default qlen 1000

link/ether 52:54:00:d9:3c:1c brd ff:ff:ff:ff:ff:ff

[root@virtual2 ~]#

In this case, the name is enp4s0, we need to add this name in Virtualizor Admin > Configuration > Master or Slave Settings > Network Settings > Network Interface If you have […]

How to Install MySQL 5.7 on Amazon Linux

Posted on January 20, 2021 (January 20, 2021) by ServerOk

Amazon Linux 2 come with MariaDB by default. To install MySQL 5.7, install repository with

sudo rpm -Uvh https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

1	sudo rpm -Uvh https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

Install MySQL 5.7 with

sudo yum install mysql-community-server

1	sudo yum install mysql-community-server

Set MySQL to start on boot

sudo systemctl enable mysqld

1	sudo systemctl enable mysqld

Start MySQL server

sudo systemctl start mysqld

1	sudo systemctl start mysqld

By default MySQL 5.7 installation generate a temporary password. To find the password, run

sudo grep "password" /var/log/mysqld.log

1	sudo grep "password" /var/log/mysqld.log

To set password and secure the installation, run […]

Yum Error Operation too slow

Posted on January 19, 2021 by ServerOk

When i did yum update on a CloudLinux server, i get following error

error was [Errno 12] Timeout on https://cl-mirror.dewabiz.com/XMLRPC/GET-REQ/cloudlinux-x86_64-server-7/repodata/filelists.xml.gz: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 120 seconds')

1	error was [Errno 12] Timeout on https://cl-mirror.dewabiz.com/XMLRPC/GET-REQ/cloudlinux-x86_64-server-7/repodata/filelists.xml.gz: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 120 seconds')

This is because server is unable to connect to one of the yum mirrors. To fix this, we need to disable the mirror that cause this timeout. Edit file

vi /etc/yum/pluginconf.d/fastestmirror.conf

1	vi /etc/yum/pluginconf.d/fastestmirror.conf

Find

enabled=0

enabled=0

Replace with

enabled=1

enabled=1

Find

exclude=

exclude=

Add below

exclude=cl-mirror.dewabiz.com

1	exclude=cl-mirror.dewabiz.com

run […]

Install Ant Media Server on CentOS 8

Posted on January 19, 2021 by ServerOk

To install Ant Media Server on CentOS 8, first install wget

yum install wget -y

1	yum install wget -y

Download installer script

wget https://raw.githubusercontent.com/ant-media/Scripts/master/install_ant-media-server.sh

1	wget https://raw.githubusercontent.com/ant-media/Scripts/master/install_ant-media-server.sh

Next you need to download binary zip file of Ant Media Server. For this install i used trail version

ant-media-server-enterprise-2.2.1-20201029_2042.zip

1	ant-media-server-enterprise-2.2.1-20201029_2042.zip

For community version, you can download from

https://github.com/ant-media/Ant-Media-Server/releases

1	https://github.com/ant-media/Ant-Media-Server/releases

Download it to same directory as “install_ant-media-server.sh”. Now run

bash install_ant-media-server.sh -i ant-media-server-enterprise-2.2.1-20201029_2042.zip -r true

1	bash install_ant-media-server.sh -i ant-media-server-enterprise-2.2.1-20201029_2042.zip -r true

Replace […]

Copy a file from host into LXD container

Posted on January 18, 2021 (January 18, 2021) by ServerOk

To copy file from host machine to LXD container run

lxc file push FILE_NAME CONTAINER_NAME/FOLDER/

1	lxc file push FILE_NAME CONTAINER_NAME/FOLDER/

Example

lxc file push ant-media-server-enterprise-2.2.1-20201029_2042.zip centos8/root/

1	lxc file push ant-media-server-enterprise-2.2.1-20201029_2042.zip centos8/root/

See LXD […]

EasyEngine Could not create user

Posted on January 16, 2021 by ServerOk

When creating a wordpress web site on EasyEngine, i get following error

root@ee:~# ee site create smartandsolar.serverok.in --wp
Starting site creation.
Warning: Could not create user smartandsolar.serverok.in-8LHl6l. Please check logs.
Warning: Initiating clean-up.
Success: Site smartandsolar.serverok.in deleted.
Report bugs here: https://github.com/EasyEngine/site-type-wp
root@ee:~#

root@ee:~# ee site create smartandsolar.serverok.in --wp

Starting site creation.

Warning: Could not create user smartandsolar.serverok.in-8LHl6l. Please check logs.

Warning: Initiating clean-up.

Success: Site smartandsolar.serverok.in deleted.

Report bugs here: https://github.com/EasyEngine/site-type-wp

root@ee:~#

This is because EasyEngine try to create a WordPress admin user, that failed to create due to length. To fix the error, you can specify a shorter wordpress admin user name with option –admin-user=admin

ee site create smartandsolar.serverok.in --wp --admin-user=admin

1	ee site create smartandsolar.serverok.in --wp --admin-user=admin

See EasyEngine […]

Reinstall Kernel in Ubuntu/Debian

Posted on January 13, 2021 (January 13, 2021) by ServerOk

To reinstall Kernel in Ubunru, you need to find the version of kernal installed, for this run

dpkg -l | grep linux-image

1	dpkg -l \| grep linux-image

Or you can use command, find the kernel version you need to install

apt-cache search linux-image

1	apt-cache search linux-image

Once you have the name of linux-image package you need to install, you can run

apt-get install --reinstall PKG_NAME_HERE

1	apt-get install --reinstall PKG_NAME_HERE

Example See apt, Ubuntu, Debian […]

How to block .git directory in nginx

Posted on January 11, 2021 by ServerOk

When using git version control to deploy application, many forget to secure .git folder. This allows anyone to clone your git repository. If you have any credentials commited to your git version control, then hacker will be able to gain access. To avoid this, it is better plan the git repo in a way you […]

Virtualizor list all vms from command line

Posted on January 11, 2021 by ServerOk

Virtualizor use libvirt to manage virtualmachines. To list all virtual machines in a server, login to server using SSH as root. run

virsh list

1	virsh list

See Virtualizor […]

Install LetsEncrypt in CentOS 7

Posted on January 10, 2021 (January 10, 2021) by ServerOk

certbot deprecated support for CentOS 7, so new version of certbot-auto script won’t work on CentOS 7. To install certbot (letsencrypt command line tool), run

yum install -y epel-release 
yum install -y python2-certbot.noarch

1 2	yum install -y epel-release yum install -y python2-certbot.noarch

To run it, use command

/usr/bin/certbot-2

1	/usr/bin/certbot-2

See LetsEncrypt […]