Data Recovery for UNIX

Data Recovery For Unix OS

Unix is not a single operating system. In fact, it is just a name that refers to hundreds of similar "UNIX-like" OS (with different implementation of flavours) supported by different companies, organisations and even individual.

No single entity actually owns UNIX OS. What is common to UNIX is only the core set of UNIX commands so we are just seeing a number of Unix variants with different tuning. Each Unix can therefore has its own unique commands, features, capabilities and may designed to work well or optimise on different sets of hardware.

A list of more popular UNIX OS could be summarised as follows:
Linux with lots of popular variants
  • Apple MacOS X Server
  • NetBSD by NetBSD Group
  • SCO Unix by Santa Cruz.
  • Sun Solaris by Sun Microsystems
  • Reliant Unix by Siemens
  • FreeBSD by FreeBSD Group
  • GNU Herd GNU Organization
  • LynxOS by Lynx Real-Time Systems
  • HP-UX by by Hewlett-Packard
  • Irix by Silicon Graphics
  • OpenBSD by OpenBSD Group
  • BSD/OS (BSDi) by Wind River
  • Compaq Tru64 Unix
  • CLIX by Intergraph Corp.

Some UNIX variants are distributed under commercial products such as AIX, HP-UX, Solaris. There are also other free UNIX such as FreeBSD, Open BSD and a number of Linux variants which are distributed and supported by volunteer organisations and individuals under the GNU General Public License.

Obviously , the UNIX file system are many and varied. Some example file systems are :
  • Extended File System ext2, ext3, ReiserFS used in Linux
  • Extended Acer Fast Filesystem EAFS used in SCO
  • Extent File System EFS, XFS used in Irix
  • Fast File System FFS, UFS – Unix File System UFS/UFS2 used in BSD
  • Journaling file system JFS used in Linux, AIX
  • Unix File System UFS used in older BSD
  • Veritas file system VFS used in HPUX, Solaris, Linux and AIX

Some file systems could be supported by more than one UNIX variants so a strict classification may not be too easy.

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