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Change the Default Shell /bin/sh is a symlink to /bin/dash, however we need /bin/bash, not /bin/...

Disabling root login via SSH Disabling SSH root login will add an extra layer of security. It wo...

Installing MySQL on Centos Uninstall MariaDB Uninstall MariaDB from the server yum remove Mari...

Applications Checklist   √ To Do 1   Install MySQL 2   Install Postfix 3   Install PH...

Configure ClamAV for daily scans Create and edit the file clamscan_daily in the folder /etc/cron...

Installation of ClamAV Execute the command below to install Clamav and a tool to send email noti...

Add sudo in front of the commands if you are using a normal account with sudo privileges Install...

Add sudo in front of the commands if you are using a normal account with sudo privileges Install...

Set SSH permitemptypasswords to no Open the ssh configuration file with your editor.vi /etc/ssh/...

Set SSH protocol to 2 SSH has two protocols it may use, protocol 1 and protocol 2. The older pro...

Disable AppArmor and Apport Both AppArmor and Apport can can be safely disabled.  They cause mor...

Installing and configuring UFW (Uncomplicated Firewall) Add sudo in front of the commands if you...

Disable or remove server services that are not going to be utilized (e.g. FTP, DNS, LDAP, SMB, DH...

The removal of legacy services Check for legacy services To check for legacy services, use th...

Randomized virtual memory region placement Add the below line to /etc/sysctl.confkernel.randomiz...

Restricting Core Dumps Add the below to the end of /etc/security/limits.confroot hard core 0 Ad...

Network Time Protocol (NTP) configuration Synchronize the system clock with the command below a...

Setting up automatic updates Installing unattended-upgrades package Install unattended-upgrades...

Updating the server with the latest updates Adding additional repositories Enable any additiona...

Installing Postfix Uninstall SendMail Run the command below to ensure that SendMail is removed/...