Features of Redhat enterprise Linux 7.0 with docker virtulization and xfs file system

Features of Redhat enterprise Linux 7.0:-

Red hat comes up with Red hat enterprise Linux 7.0 for customers. This time  Red hat concentrate more on virtualization and storage. Here is some good features.

Ø  Docker 1.0->contains virtualization previously it was KVM (kernel virtual module) which improves scalability and performance.

Ø  XFS->new file system introduced by  Red hat  for  new  operating system7.0.This file system XFS supports up to 500 TB.RHEL 6 have  ext4 file system has default but also option  xfs.

Ø  MARIA DB-> It is default data base in RHEL7 which is advance  SQL

Ø  KERNEL->3.10 version  in RHEL7

Ø  SAMBA4.1&BTRFS->SAMBA is used for data sharing between windows and unix operating systems. RHEL7 come up with SAMBA4.1 having additional features. Btrfs is intended to address the lack of pooling, snapshots, checksums, and integral multi-device spanning in Linux file systems.

Redhat  Linux 7,features of  Red Hat linux 7,New features of  Red hat linux 7,features of RHEL7

linux interview questions,linux administrator interview questions

linux interview questions,linux administrator interview questions,linux admin interview questions and answers,interview questions for linux admin,latest interview questions for linux admin,top interview questions for linux admin,system admin interview questions

Linux interview questions

1. What is init process?

Ans: Every process  will be having a parent process except init process. It is parent process in the system.it is first process initiate by kernel. PID of init will be1.

2. How to create  partion  in Linux?

Ans: Fdisk is  command to create partion.To see partion list fdisk –l.To create partion  fdisk /dev/sda or  hda.

3.what are commonly used  kill command signals?

Ans: Kill –l wll list out all signals of kill command.There are 64 signals in linux mainly we use five important signals.

  Reloading signal

  9.killing process

  15.for terminating process

  20.for stopping the process

4. Difference between ext3 and ext4 file system?

Ans: Ext3 stands for third extended file system.It was  introduced in 2001.max file size can be 16gb to2tb. supports journaling feature.Ext4 stands  for fourh extended file system.It was introduced in 2008. Maximum file size can be 16gbto 16tb.supports journaling feature.

5. How to create ftp user?

Ans: Suppose  paul  new  user want to be ftp user. Useradd paul.assign password for user.passwd paul.in configuration file  vsftpd.conf local enable=yes. 

    6. What is port number for ftp?

      Ans: Port no:20 for ftp data transfer

     Port no:21 for ftp control connection

7. Which file store  all services  and port numbers?
Ans: All services and port numbers are in /etc/services.Each service is assigned with default port no.

8. How to down load a package using yum tool with out install?
Ans: Yum install –download  package name.before that download plug should be installed .For that yum install  --download .

9. How to view jobs info with job id?
Ans: Jobs command will list out jobs in back ground.it also displays with job id.

10. How to send job to back ground?
Ans: Presently running job stopped by  pressing  ctrl+z.then  type bg which leads  frount ground job to back ground.

11. How to send four ground job to back ground?
Ans: fg command which takes back ground job to front ground.

12. What are port numbers for samba?
Ans: netbios-ns - 137/tcp

netbios-dgm - 138/tcp

netbios-ssn - 139/tcp

microsoft-ds – 445/tcp

13. What is LILO?

Ans: LILO is boot loader for older linux systems. It is  used to start operating system.GRUB is latest boot loader for latest linux systems.

14. How to create print q in linux?

Ans: Start print q from linux  system type /usr/bin/enable  printer model

Stop print queue  type /usr/bin/disable printer model

15. What is  command to know open ports on remote machine?

Ans: Type  nmap is command to know open ports on remote machines.

History of unix, unix hstory, unix fetures

History of unix,unix hstory,unix features

History  of  Unix:

Journey  of  unix  started from  MULTICS(multiplex information and computing  system).This project was  started by AT&t,GE in the  year of 1965.Objective  this  process is  to provide multi user capability.It was partially succeeded to two users.

In 1969 unix  was developed ,it  is extension of MULTICS can  provide  multiuser capability to 100 users. This  was developed by    KENTHOMPSON&DENNIES RITCHIE.UNICS was developed by 80%  c language and 20% assembled language.

Popular unix was developed  in 1973 completely developed by c language.

FEATURES OF UNIX:

MULTITASKING&MULTIUSER CAPABILITY: At a  time  several  works can be done ,that is called multiTasking.  At time users can login into machine that is called multiuser capability.

Programming facility

Portability

Security

 

Network support

Unix has various flavours.differnt flavours will support  different   hardware.

Vender                           FLAVOUR

AT&T                              sys3&sys5

SUNMICROSYSTEMS          SOLARIES

IBM                                AIX 

HP                                  HP-UX

BSD                                BSD free unix     

awareness about windows xp users

windows xp news,awareness about xp users,upgrade from xp to other windows os like windows7,windows8

Most popular windows xp era above to come to an end.its big shock for xp users but its true,by next year april onwords MICROSOFT stop services for xp.if you continue with same os you will not get any security updates and there is no co-operation from microsoft. is there easy chance to Hackers to hack your xp system.so please upgrade from older xp to new os like windows 7 or windows 8 or windows vista by 2014 april.windows xp  almost 80% runs in india.xp was started in 2001.so giant era comes to an end.

           windows 7 comes with  so many advanced features  like  file searching,fast boot up ,look and feel is so good.windows 8 comes with touch feature.so upgrade from older xp to new os is necessary now

operating system ,types os operating system(OS)

What is  operating system?

Operating system is used to interact between user and hardware.

It is system software resource manager e.g. any software applications like notepad open, close and edit.

It recognizes hardware and work them  properly.

OS mainly used for functioning all programs working smoothly and in disciplined manner it is called multi tasking.

Without os we can’t run computer.

So many operating systems available in the market. Popular os are windows(DOS,windows98,xp,vista,windows7).UNIX(LINUX,UBUNTU) and MAC OS.