Published on : July 1, 2014 by Vijesh Vijayan
Preface The boot sequence of Linux starts with the BIOS determining the primary boot device (Usually the first disk). Next the grub is displayed and we choose the desired Operating System. Loading of the OS starts next and the kernel is loaded into memory. Following the Kernel, the linux initrd is mounted. After this, control […]
Published on : September 2, 2010 by Vijesh Vijayan
How many times in Linux shell scripting have you written scripts and a had bad time with those having spaces? The remedy to this situation is your IFS value. IFS or Internal Field Separator holds the value which separates the various entities. This can be file names, values read a script by read etc. It […]
Published on : by Vijesh Vijayan
Server security experts define rootkits as a collection of programs that enable an attacker to get the same privilage as the root user in a linux or unix system. The word is composed of two portions: ‘root’ – meaning the application will provide the highest access level of the root/administrator in the system and ‘kit’ […]
Published on : August 5, 2010 by Vijesh Vijayan
This PostgreSQL basics Tutorial providing the must know basics for the system administrators. PostgreSQL or Postgres is an object-relational database management system (ORDBMS). Unlike MySQL, PostgreSQL is not controlled by any single company, it is a community developed project. It is a advanced version of the ‘Ingres’ Database project (which is how the project gets […]
Published on : July 7, 2010 by Vijesh Vijayan
SSL certificate or Secure Sockets Layer (Notice the last s in sockets) is used to secure the communication over the internet. This technique was introduced by Netscape. It uses the RSA public key cryptography for encryption/decryption. In the protocol stack used in the internet. The SSL protocol runs above TCP/IP and below higher-level protocols such […]
