Install bitninja firewall

To install bitninja on Debian/Ubuntu, run

To scan malware, run

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Download a package using apt on Debian/Ubuntu

download package using apt

On Debian and Ubuntu servers, you can download a package using apt download command.

Package will get downloaded to current working directory. Better do this to /tmp to avoid permission errors. Method 2 If you want to download package and dependencies, then use

This will download the package and all dependency, store it […]

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Blocking Package Upgrade on Debian/Ubuntu

To block packages from upgrading, you can use command apt-mark hold.

Example

To list packages that are on hold, run

If you want to remove block, you can use apt-mark unhold command.

See apt […]

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Configure KVM Bridge Network on Debian 10

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

You may also need ifdown and resolvconf packages installed

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

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

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Install kvm on Debian 10

To install kvm on Debian 10, run

Install libvirt, it is a tool to manage kvm

Set libvirtd to start on boot

Restart libvirtd

You can see libvirtd status with

Install virtinst, it is used to create virtual machine.

To see network, run

Start the “default” network

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apt-get An error occurred during the signature verification

When running apt update, i get following error

To fix this error, run

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Expired Updates for this repository will not be applied

When running apt update on a Debian jessie server, i get following error

To fix the error, run

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Install ModSecurity on Debian

To install ModSecurity on Debian/Ubuntu Apache web server, run

Restart Apache web server

Verify mod_security installed with

To activate ModSecurity rules, run

Edit

set

Get latest rules

Emable the config file

Edit file

Add

Restart Apache

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apt force IPv4

One of my internet provider only provide IPv4 connection. When i run apt install command, it failed with error as it try to connect using IPv6.

To force apt to use IPv4 only, edit

Add

If you want to force IPv6, add

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Install Elasticsearch on Debian for Magento

To install Elasticsearch for Magento on Debian, install Java 1.8 and apt-transport-https

Add key

Add repository

Install Elasticsearch

Enable and start Elasticsearch

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