Difference: InstallingCentOS7 (24 vs. 25)

Revision 2511 Nov 2021 - IvoVanGeel

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Installing CentOS 7

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  • Make sure root cannot log in via ssh by changing /etc/ssh/sshd_config:
    • PermitRootLogin prohibit-password
    • This will disable logging in as root, via ssh, but it is still possible to log in as root using SSH public key authentication.
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  • Disable SELinux by setting SELINUX=disabled in /etc/sysconfig/selinux (a reboot is needed to fully disable SELinux)
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  • Disable SELinux by setting SELINUX=disabled in /etc/sysconfig/selinux (a reboot is needed to fully disable SELinux. Do not disable SELinux for production systems)
 
  • Disable the firewall (when in a secure network), by running: systemctl disable firewalld
  • Enable irqbalance: systemctl enable irqbalance.service (only useful on an SMP system)
  • Set up /etc/ntp.conf:
 
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