Ensure that sendmail is stopped in the host systemctl stop sendmail systemctl disable sendmail Install the postfix package yum install postfix Backup the main postfix configuration file in case it is required for future use…
At times it may be desired not to add a mount point permanently via the /etc/fstab, but just automatically mount when the user just desires to access a particular share. This is a scenario when…
The firewalld is the default firewall service used in CentOS 7 and RHEL 7. This service replaces traditional IPTABLES used in earlier versions of the Linux operating systems. Firewalld organizes rules in various zone. There…
It is a challenging task to create the perfect iptables rules allowing only the required traffic. *** VERY IMPORTANT* ** Before making any changes in the iptables ensure that you have console access to the host…
In a plain http server, if we use apache with php or perl, what happens is that the executable files such as html, php, pl, etc will be run as the user apache. In this…
This page gives basic information about Redhat Linux file system management. Disk Druid: The only tool used for partitioning management at the time of installation Partitioning management utilities available after installation: fdisk parted sfdisk…
Boot sequence BIOS POST MBR GRUB (stage 1) GRUB (stage 2)– /etc/grub.conf KERNEL Components in the file grub.conf Default Time out Splash image : The wall paper Title : Windows, linux, dos, etc Few parameters…
This page gives basic instructions on how to install Redhat Linux software on a new host Two types of Installations: Local: Through CDROM or Hard disk Network: Through FTP, NFS, HTTP Procedure to…