Answer / fuzail usmani

Kernel mode, also referred to as system mode, is one of the
two distinct modes of operation of the CPU in Linux. The
other is user mode, a non-privileged mode for user programs,
that is, for everything other than the kernel.
When the CPU is in kernel mode, it is assumed to be
executing trusted software, and thus it can execute any
instructions and reference any memory addresses. The kernel
is trusted software, but all other programs are considered
untrusted software. Thus, all user mode software must
request use of the kernel by means of a system call in order
to perform privileged instructions, such as process creation
or input/output.

Answer / zainul abedin

the mode in which the linux install first time is f1

Answer / susheel narayan singh

when you install redhat at that time you can switch into
terminals from ctrl+alt+f1 to ctrl+alt+f7
each terminal show different message.
but when you will go ctrl+alt+f4 then it is kernel mode
because it show kernel messages including detected hardware
and drivers.

Answer / ashish

I guess the Kernel mode will be kernel itself and the user
processes will not be able to use the resources that the
kernel is using. This is done to protect the kernel from
user programs.
Kernel compilation is installing a new kernel or adding
custom modules to the same kernel.
Kernel upgradation is upgrading it to a different version
altogether.

As a system admin i want to know some things what are the troubleshooting issues we are facing frequently and what are the tickets will be raised.

0 Answers   Ondot,

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When you install RedHat what is the kernel mode ? What is kernel compilation / upgrade ?

4 Answers   IBM,

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what is meant by mysql clustering

2 Answers  

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rpm package installation error in centos 6.4 [root@localhost packages6.4]# rpm -ivh nfs-utils-1.2.3-36.el6.i686.rpm warning: nfs-utils-1.2.3-36.el6.i686.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY error: Failed dependencies: keyutils >= 1.4-4 is needed by nfs-utils-1:1.2.3-36.el6.i686 libevent is needed by nfs-utils-1:1.2.3-36.el6.i686 libevent-1.4.so.2 is needed by nfs-utils-1:1.2.3-36.el6.i686 libgssglue is needed by nfs-utils-1:1.2.3-36.el6.i686 libgssglue.so.1 is needed by nfs-utils-1:1.2.3-36.el6.i686 libgssglue.so.1(libgssapi_CITI_2) is needed by nfs-utils-1:1.2.3-36.el6.i686 libnfsidmap.so.0 is needed by nfs-utils-1:1.2.3-36.el6.i686 libtirpc is needed by nfs-utils-1:1.2.3-36.el6.i686 libtirpc.so.1 is needed by nfs-utils-1:1.2.3-36.el6.i686 nfs-utils-lib >= 1.1.0-3 is needed by nfs-utils-1:1.2.3-36.el6.i686 rpcbind is needed by nfs-utils-1:1.2.3-36.el6.i686

1 Answers  

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what is NIS Server...?

2 Answers   IBM,

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User unable to login in server then how can u troubleshooting it? Example: server at Bangalore. in that server two users try to login in server. 1st user able to login. but second user unable to login so how can troubleshoot it ?

5 Answers   Oracle,

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You want to create a compressed backup of the users' home directories. What utility should you use?

5 Answers  

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I have accidently deleted my fstab... how do i recover/ regenerate the file?????? in rescue mode i cannot create a new file since the filesystem is readonly and could not mount in readwrite mode ?????????

6 Answers   IBM,

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How to load the old kernel without rebooting server

1 Answers  

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How To Hide the FTP Version?

3 Answers   Wipro,

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i want to install XP on RHEL5 with virtualization tell me step by step configuration

1 Answers  

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Without using w command how can Iknow that who are users logged in and what they are doing and whether they are idle or running mode?

4 Answers  

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