dns

Bind DNS Service

DNS is a structured database system that maps a computer’s fully qualified domain name into an IP address. Computers in a network use IP addresses to locate and connect to each other, but IP addresses…


linux

Linux SWAP Memory

Listed delow is the procedure to create a swap space in Linux: # fdisk /dev/sda : Create a partition in Linux # mkswap -v1 /dev/sda10 : Make and format swap partition using this command #…


redhat

Redhat Linux User Administration

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

Redhat Package Manager (RPM)

Set of binary files, which are compiled programs. This is similar to add/remove programs in windows. RPM is used to manage installation packages including installation and un-installation. The database that contains information of all rpms…


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Linux File Attributes

Listed below are few attributes that can be assigned to a file: # chattr +i /etc/passwd : i = immutable (cannot remove, edit, rename or move) # chattr -i /etc/passwd : Remove the above attribute…


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RedHat Linux FSTAB

Syntax:   Mount options: rw x ro : Read only / Read & write exec x noexec suid x nosuid auto x noauto : Should this device be mounted in boot-up automatically or not user…


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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 Total partitions allowed is 63. From the fifth, it will be extended…