Answer: mt -f /dev/rmt/0 rewind

peter

• Apr 9th, 2007

#mt rewind

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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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sleep:
This command is used in UNIX operating system to suspend execution of the system for the specified time limit mentioned in it as parameter.
The general format of sleep command is

sleep no_of_seconds

The sleep suspends the execution of the shell in UNIX operating system for the no_of seconds specified.
For instance

sleep...

sudhir deshmukh

• Mar 8th, 2007

sleep is a Unix command line program that suspends program execution for a specified period of time.Wait The wait function suspends execution of the current process until a child has exited, or until ...

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compress command is used for compressing a file that is for making the file size compact so that it becomes small. When a compress command is used in UNIX all the file attributes like the owner of the file and other things remain same except the file size is compressed and the extension of the file becomes .ZThe general syntax for compressing file iscompress filenameFor instance if one like to compress...

SureshBV

 Profile Answers by SureshBV Questions by SureshBV

• Mar 7th, 2007

Exactly as in the above comment Compress command is for compressing the file and it can uncompress when ever required.compress <filename> - to compressuncompress <filename> - to uncompress...

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Yes, �mkfs� is used to create a new file system.

sania

• Mar 7th, 2007

Yes,mkfs -t filesystem? device name.for e.gmkfs -f ext3 /dev/hda2

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siva2sk

 Profile Answers by siva2sk Questions by siva2sk

• Feb 24th, 2007

got to think from OS and usage perspectives..(i am a linux & unix guy, so my explanation may seem anti-wdos)linux - monolithic kernel, open source, 1000s of reviewers, supports loadable kernel mod...

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siva2sk

 Profile Answers by siva2sk Questions by siva2sk

• Feb 24th, 2007

oh, i forgot to answer the part about function./system. calls- function call is generally within the same protection space (ie. user mode to user mode or kernel mode to kernel mode).- system call is w...

siva2sk

 Profile Answers by siva2sk Questions by siva2sk

• Feb 24th, 2007

you should refer to a man page. both create a child process.fork - parent and child are in 'running' status. they share all page tables until one of them does a write, then on-demand paging wi...

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dave

• Feb 11th, 2007

The root user would be allowed to ftp to the server. The /etc/ftpd/ftpusers file lists users that are disallowed from using ftp.

Nagajothi

• Feb 6th, 2007

The 'root' cannot access the remote system using FTP connection.

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Shell layer manager is also called as shl in short. This utility is used for running number of scripts simultaneously at the same time in a single terminal. This utility plays a very important role in UNIX operating system because as we all know UNIX is a multi-programming operating system. So in other words there many be many instances or occurrences in which the users in the UNIX operating system...

thangaraj

• Jan 27th, 2007

It means same for dos external commands

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Answer: /etc/cron.d/cron.deny

ravikumar_koyyada

 Profile Answers by ravikumar_koyyada Questions by ravikumar_koyyada

• Jan 19th, 2007

1.To deny cron access the cron daemon checks if the file /etc/cron.deny exists and if it does then it checks all users listed there for whom cron access has to be denied.2. If /etc/cron.deny does not ...

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$ echo *It is similar to 'ls' command and displays all the files in the currentdirectory.

sameer

• Jan 14th, 2007

Ya u r correct, $echo *  will give u the files in the current directory similar to ls command.

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Kill $!

sameer

• Jan 14th, 2007

To kill the last background job, the following command is used:$ kill $!The system variable $! stores the PID of the last background job.The other method is first find the PID using the ps command, then use kill command to do the job.

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xxjjs

• Jan 12th, 2007

WhenUnix is running, the kernel has been loaded into the memory. Thekernel file is located in /boot, name vmlinux, usually followed bythe version

shri

• Aug 1st, 2006

/stand directory name vmunix.

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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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lokesh.A

• Dec 18th, 2006

Crontab -r (username) removes all the entries of that user .

arav

• Nov 6th, 2006

 first you can do crontab -l to list down the entries and then compare it with currently executing Process - check the name or path from where it's getting executed. Cheers!~arAVis~  

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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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sharifhere

 Profile Answers by sharifhere Questions by sharifhere

• Dec 7th, 2006

Extensively used one are:ps -eafkillfork

Divya

• Oct 23rd, 2006

System Calls for process control * fork() * wait() * execl(), execlp(), execv(), execvp() * exit() * signal(sig, handler) * kill(sig, pid)

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George V J

• Nov 21st, 2006

If it is a UNIXWARE system, the OS creates a core dump of system RAM ( after a system crash ) in a partition called SWAP. When the system is booted up after the crash, it will ask you to save the...

Deepa

• Aug 24th, 2006

I guess it can be done using gdb corefilename

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Ls becomes the input to wc which counts the number of lines it receives as input and instead of displaying this count , the value is stored in file1.

sangee

• Nov 15th, 2006

first ls command will list all the files in the current dir.thenthat result is fed to wc -l which will count the number of lines fed by the input(ie ls ),now finally the result which is the number of lines is fed to the file1.

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