Unblock an IP from fail2ban
To check if an IP is banned by fail2ban, run To unblock an IP, you should find the jail that caused the…
Linux
Install VirtualBox 6.1 on Ubuntu 18.04
First you need to add VirtualBox repository sudo echo “deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian bionic contrib” > /etc/apt/sources.list.d/virtualbox.list Add Keys wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O-…
Install kvm on Debian 10
To install kvm on Debian 10, run apt install -y qemu-kvm Install libvirt, it is a tool to manage kvm apt install…
chmod
chmod command allow you to change permission for a file or folder. The above command changes the permission of file index.php to…
Joining files with Cat on Linux
I have a movie cut with hjspit. To join them on Linux, run Back to cat
Linux alias
alias can be used to create custom commands. To see all alias on your computer, you can run command alias Here are…
Install bind in CentOS 7
bind is a DNS server. To install bind on CentOS 7, run yum install bind bind-utils -y Enable bind to start on…
SSH Port Forwarding
On a remote server, we have an application running on 127.0.0.1:8010. Since the application is listening on internal IP address 127.0.0.1, we…
kex_exchange_identification: read: Connection reset by peer
When connecting to Ubuntu 20.04 server using SSH from a Mac computer, get an error kex_exchange_identification: read: Connection reset by peer On…
Cpanel CloudLinux set all users to use alt-php
If your cpanel server have cloudlinux + PHP Selector installed, you need to set all site to use inherit PHP before you…
Ant Media Server
Ant Media Server is a media streaming server with WebRTC support. https://antmedia.io Install Ant Media Server on CentOS 8 Ant Media Server…