Use ‘su’ command. The system asks for password and when valid entry is made the user gains super user (admin) privileges.

bkoh

• May 21st, 2007

"su" is the command to switch to a super user status (commonly known as root user) from a user shell.This command does not load the shell settings for a typical super user that login fr...

sania

• Mar 7th, 2007

Well, su - is the command that is used to switch to a super user.After that it will ask for password of root.then you are super user.

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Two prompts, PS1 (Primary Prompt), PS2 (Secondary Prompt).

Linux User

• Oct 30th, 2007

Bash supports 4 prompts:PS1 - the default promptPS2 - for multi-line inputPS3 - printed for the select commandPS4 - printed before output if set -x is set(see http:// www . gnu . org/software/bash/man...

kcube

 Profile Answers by kcube Questions by kcube

• Nov 13th, 2006

PS1 Prompt used as the normal system promptPS2 Prompt used when the shell expects more inputPS3 Prompt used when you have root authority

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harsha419

 Profile Answers by harsha419 Questions by harsha419

• Jul 7th, 2009

A linker takes several object files and libraries as input and produces one executable object file (or) Linking is simply the process of placing the address of a called function into the calling funct...

abhishek

• Jan 2nd, 2007

Load -> Puts the CSECT(smallest executable unit) into main memory.Linking is a different cup of tea, this is done to make a module executable.The only way you can draw a relation between is wh...

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There are 3 types of Redirection.1)Input Redirection2)Output Redirection and3)Error RedirectionInstead of directing the input/output/error from/to the standard devices, we can direct them to/from a file

deepak

• Dec 18th, 2006

A redirector is the client-side object that forwards I/O requests to remote files,where they are satisfied by a server..they usually run in kernel mode

Sagar

• Mar 9th, 2006

The process of redirecting the input/output of a command from standard I/O is called redirection

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Rambo188

 Profile Answers by Rambo188 Questions by Rambo188

• Aug 23rd, 2008

If OS can't boot into multi-user level, I can try to boot the OS into single-user level.If I can't boot into single-user level, I wouldn't read the messages in /var/adm/messages.

PENGUINCODER

 Profile Answers by PENGUINCODER Questions by PENGUINCODER

• Sep 11th, 2006

Type in "dmesg" to read what you missed during the boot process.

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Crontab is a very useful command used for scheduling purpose. If a person working inn Linux operating system wishes to schedule to run later they can achieve this by using the crontab command. Thus it is possible that each user working in the Linux operating system can define their own crontab. There are many options available with this crontab command. Some of them are namely:
Crontab with...

vdeshpande

 Profile Answers by vdeshpande Questions by vdeshpande

• Oct 29th, 2007

Crontab will keep ur jobs ongoing even when u are away crontab *****  each star has its own meanin  hors days month year  dayof the month plz check more on this topic @linux userforums

Bhagavan Reddy

• Apr 19th, 2007

Hi,Please explain clealy crontab command.And i want to run one shell script every 3 hours, and it should start 1 A.M and end should be 10 P.M.How to use crontab command for above requirement...RegardsBhagavan Reddy.

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sharifhere

 Profile Answers by sharifhere Questions by sharifhere

• Jan 8th, 2007

Grep is used for pattern searching in files

Sreedhar

• Nov 12th, 2006

GREP: Global search a Regular Expression and Print it.It is used to select a word or group of words from a given file or directory etc.syntax: grep ""

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sandeepypr

 Profile Answers by sandeepypr Questions by sandeepypr

• May 22nd, 2008

There is no compress command in  LINUX. we have to use ZIP for compressing and gunzip for uncompressing a file. in file extensions also we have difference .

Mark Young

• Nov 6th, 2007

Where you have a file extension of .gz, it is normal to use the "gunzip" command to uncompress the file. Sounds like you compress command ran "gzip" to compress the file.

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venus.bbsr09

 Profile Answers by venus.bbsr09 Questions by venus.bbsr09

• Mar 19th, 2011

Command is vi /etc/grub/grubconfig

kumar3786

 Profile Answers by kumar3786 Questions by kumar3786

• Jul 17th, 2008

Boot frm 1st cd type1) chroot /mnt/sysimage2) grub-install /dev/sda

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How will you assign superuser privilege to an ordinary user temporarily?

abdas

 Profile Answers by abdas Questions by abdas

• Jul 31st, 2011

Command su to be used for Acquiring superuser status
Suppose you are already logged in with a username juliet, you can get the superuser status like below.
$ su
Password: ******** -> roots password. But this is not temporary.

thumbeti

 Profile Answers by thumbeti Questions by thumbeti

• Mar 22nd, 2011

There are 2 to do this.1) Edit /etc/passwd file by chaning the UID of the required user to "0"     This makes normal user as superuser2) Using "sudo", ordinary user can execute any command with superuser privileges.

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What is the command to fetch first 10 records in a file?

sunil

• Jul 27th, 2011

Command as follows
HEAD -10 filename

and for lower records

TAIL -10 filename

srnayak17

 Profile Answers by srnayak17 Questions by srnayak17

• May 20th, 2010

It would be always safe to use 'sed command'sed -n '1-10p' filename > outputfile

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Assume that you are NOT currently in your home directory. Enter a command to copy all files in your home directory beginning with the letter 'a' to the current directory.

sirisha

• Apr 30th, 2012

Cp [a]* /export/home/

Tdolby

 Profile Answers by Tdolby Questions by Tdolby

• Dec 12th, 2010

Cp ~/a* .

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By using which command can you find the CPU utilization time?

abdas

 Profile Answers by abdas Questions by abdas

• Jul 31st, 2011

$ iostat
tty 2/md300 2/md301 2/md302 2/md303 cpu
tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
0 4819 0 0 4 292 15 3 1 0 3 0 0 4 67 10 0 22

nelgin

 Profile Answers by nelgin Questions by nelgin

• Apr 6th, 2011

Top shows you current, if you want historical information, and it's configured, you can use sar.

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‘grep’ is a pattern search command. It searches for the pattern, specified in the command line with appropriate option, in a file(s). Syntax :      grep Example :    grep 99mx mcafile

cutesree

 Profile Answers by cutesree Questions by cutesree

• Jun 3rd, 2010

When you want to  display the lines which do not start with #, then give following command ,grep -v "^#" file1.txtif you want to serach recursively in all the directories , then give ,grep -r "string"

muru

• Nov 21st, 2006

Grep - stands for Globally Search a Regular Expression and Print. It is used to search a given string/pattern under the given path and list out all the occurances of it in a file or set of...

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edelgado5

 Profile Answers by edelgado5 Questions by edelgado5

• Aug 20th, 2009

Solaris: df -g Linux: /sbin/dumpe2fs /dev/sdaX |grep 'Block size'  

edelgado5

 Profile Answers by edelgado5 Questions by edelgado5

• Aug 20th, 2009

In AIXlsfs -q

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neelimaracha

 Profile Answers by neelimaracha Questions by neelimaracha

• Feb 22nd, 2011

If they are old files, they will be in snapshot directory Goto the directory, at which files were deleted and do cd .snapshot.Files will be present according to the dates in the respective folders lik...

poornimay

 Profile Answers by poornimay Questions by poornimay

• May 22nd, 2008

Using debugfs we can restore the deleted file provided if we know the inode no. of the same file

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hari.pardha

 Profile Answers by hari.pardha Questions by hari.pardha

• Feb 3rd, 2010

Option one is the correct one.

Satya

• Oct 10th, 2007

Boot Block,Super Block,I-list,and Data Block..

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Vaibhav

• Apr 3rd, 2007

This should be as below:sqlplus -s userid/password@databaseIn case you want to connect to SQL databasesqsh -S Servername -U username -P passwordIn case od SYBASEisql -S Servername -U username -P passwordRegards,Vaibhav

Ramakrishna

• Nov 23rd, 2006

Hi All,By writing the shallscript we can directly connected to oracle#!/user/bin/bashsqlplus "/as sysdba"connect SELECT distinct contactname,address FROM customers;shutdown immediate

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Df -h

Chiranjeevi Manne

• Mar 30th, 2007

Use "df -k" or "df -h"

Aruna

• Jul 11th, 2006

   df and du commands  are used for checking free space on disk .    df -h or df -Humanreadable gives human readable format of free space

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SELLAPPA SIVAKUMAR

• Jan 6th, 2012

Kernel - The kernel is the main component of most computer operating systems. - It is a bridge between applications and the actual data processing done at the hardware level - The kernel is the heart ...

Swayam Shah

• Sep 7th, 2006

Unix was developed using ?C? Language. Unix was the foundation on which Linux was built. Unix has Character based environment while Linux has Graphical as well as Character based environment. Unix has...

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