Cron – Configure Recurring jobs
The cron application enabled users to run recurring jobs utomatically. It can include taking a backup at 03:00 AM every day, capturing users who have logged in at 5:00 PM, etc. The daemon that runs…
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Creating YUM and DNF Repositories
As we all knows the yum and dnf commands are used to download and install software packages from software repositories configured in the node. In a centOS server, centos repositories will be configured by default….
AT command : Running one time future task
Unlike the the cron job is mainly used to schedule repetitive tasks, the “at” command is used to run a command just once, but schedule at a later time. That yum package to be installed…
Redhat – Links between files
Every file or folder created in a Linux system is associated with an iNode. The name given to the file is mapped to the inode created. Hard Link The below command creates two hard links to…
SELINUX
SELinux is a set of security rules using which we can control the processes/application that can access specific files, folders and ports. These processes, files, folders and ports has a special security label called SELinux…
Redhat Linux User Administration (RHEL 4)
User ID = uid. The uid of root is 0. UID from 1 to 499 is reserved for system services such as the user apache, nagios, etc The first user created by root will always…
RedHat Linux Boot Sequence (RHEL 4)
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…
Red Hat Enterprise Linux 4 INSTALLATION
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…