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Configure KVM Bridge Network on Debian 10

Posted on August 4, 2020 by ServerOk

Before you configure bridge network, make sure you have bridge-utils installed.

apt install bridge-utils

1	apt install bridge-utils

You may also need ifdown and resolvconf packages installed

apt install ifupdown resolvconf

1	apt install ifupdown resolvconf

Here is the default /etc/network/interfaces i had on the server

root@PAR-199235:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp1s0f0
allow-hotplug enp1s0f0
iface enp1s0f0 inet static
	address 163.172.107.119
	broadcast 163.172.107.255
	netmask 255.255.255.0
	gateway 163.172.107.1
	dns-nameservers 8.8.8.8

root@PAR-199235:~#

root@PAR-199235:~# cat /etc/network/interfaces

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto enp1s0f0

allow-hotplug enp1s0f0

iface enp1s0f0 inet static

address 163.172.107.119

broadcast 163.172.107.255

netmask 255.255.255.0

gateway 163.172.107.1

dns-nameservers 8.8.8.8

root@PAR-199235:~#

enp1s0f0 is name of the network interface card on the server. To convert it to brudge configuration. You need to replace enp1s0f0 […]

bridge

Posted on August 4, 2020 (August 4, 2020) by ServerOk

Linux KVM Bridge network on Ubuntu Configure KVM Bridge Network on Debian 10 […]

ps

Posted on August 3, 2020 by ServerOk

bash: ps: command not found […]

bash: ps: command not found

Posted on August 3, 2020 by ServerOk

On a docker image, when i run ps, i get error

root@2efea503e8b7:~# ps
bash: ps: command not found
root@2efea503e8b7:~#

root@2efea503e8b7:~# ps

bash: ps: command not found

root@2efea503e8b7:~#

To install ps on Debian/Ubuntu, run

apt -y install procps

1	apt -y install procps

[…]

Bash Script to Monitor Disk Usage

Posted on August 2, 2020 (August 2, 2020) by ServerOk

This script will check disk usage on / partition and email you if disk usage is above 80% We can use df / command to find current disk usage

df /

df /

As you can see, the result have 2 lines. We don’t need first line. To ignore first line, we can use

df / | grep -v 'Filesystem'

1	df / \| grep -v 'Filesystem'

From the result, […]

mutt

Posted on August 2, 2020 by ServerOk

Read mails in Maildir folder […]

Read mails in Maildir folder

Posted on August 2, 2020 by ServerOk

To read mail from Maildir folder, use mutt. You can run

mutt -f /home/user/Maildir

1	mutt -f /home/user/Maildir

To install mutt on Ubuntu/Debian, run

apt install mutt

1	apt install mutt

[…]

Enable CORS in Nginx

Posted on August 1, 2020 (August 1, 2020) by ServerOk

To enable CORS in nginx, add following inside web sites sevrer config.

add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

add_header 'Access-Control-Allow-Origin' '*';

add_header 'Access-Control-Allow-Credentials' 'true';

add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';

add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

Restart nginx

systemctl restart nginx

1	systemctl restart nginx

See CORS […]

CORS

Posted on August 1, 2020 (August 1, 2020) by ServerOk

Enable CORS in Apache Enable CORS in Nginx […]

Enable CORS in Apache

Posted on August 1, 2020 (August 1, 2020) by ServerOk

To enable CORS in apache, add following in VirtualHost or .htaccess

Header set Access-Control-Allow-Origin "*"

1	Header set Access-Control-Allow-Origin "*"

If your apache installation don’t have mod_headers installed, you need it enabled with

a2enmod headers
systemctl restart apache2

1 2	a2enmod headers systemctl restart apache2

[…]