== Users and permissions practicum == * Rig it so everything in the folder gets deleted tonight at 10pm. Every night at 10pm.== Local security == * How do you feel about `sudo`? * What's the difference between `telnet` and `ssh`? What's a good use for each? * How do you ensure your users have hard-to-guess passwords?== Filesystem == * What is the difference between a symbolic and hard link? When...

Create a 5 child process from a common parent and launch different applications from the children processes....

MS

• May 6th, 2007

The waitpid function call suspends execution of a process till a child specified by a process id in the argument has exited execution.

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MS

• May 6th, 2007

Mkdir to create directorycd to change directoryrmdir to remove directory (must be empty)pwd to show present working directoryls to list contents of a directory

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MS

• May 6th, 2007

A child process is an almost exact copy of a process created by forking. The child process, however, has its own unique process id, and maintains a reference to the parent's process id.

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MS

• May 6th, 2007

Bourne shell:var=valueexport varKorn shell:export var=valueC-shell:setenv var value

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Gopi K

• Jun 21st, 2007

The file server is a machine that shares its disk storage and files with other machines on the network.

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vishgoel

 Profile Answers by vishgoel Questions by vishgoel

• Mar 12th, 2008

0 or 1; depending upon the arguments given to kill. to enforce killing use kill -9

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MS

• May 6th, 2007

A wildcard character is a character that can be substituted for any of a well-defined subset of all possible characters. It may also be termed as a pattern-matching character.For example, while referr...

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Gopi K

• Jun 21st, 2007

The major advantage of a hash table is its speed. Because the hash function is to take a range of key values and transform them into index values in such a way that the key values are distributed randomly across all the indices of a hash table

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bubba

• May 3rd, 2007

du - summarize disk usage
The du utility writes to standard output the size of the file space
allocated to, and  the size of the file space allocated to each subdirectory of
the file hierarchy rooted in each of the specified files.

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vaibhavjain85

 Profile Answers by vaibhavjain85 Questions by vaibhavjain85

• May 31st, 2007

/(root)UNIX           BIN            Lib          ...

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Gopi K

• Jun 21st, 2007

vfork() differs from fork() only in that the child process can share code and data with the calling process (parent process). This speeds cloning activity significantly at a risk to the integrity of t...

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Gopi K

• Jun 21st, 2007

#include <sys/types.h>#include <sys/stat.h>int stat(const char *path, struct stat *buf);The stat() function obtains information about the named file andwrites it to the area pointed to by ...

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Sunny

• Dec 25th, 2005

I am assuming the question is - port 32 bit appl to 64 bit os.This can a simple checklist of things one can check for -1. Int, long will be 64 bits so care should be taken to see if there are any comp...

kalyan_alle

• Oct 21st, 2005

sir can anybody tell me whats the answer fo this question in the comment title box

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Write a pipeline of commands, which display on the monitor as well as save the information about the number of users using the system at present on a file called usere.ux

sham2sushil

 Profile Answers by sham2sushil Questions by sham2sushil

• May 2nd, 2010

Use the tee command.who | tee  -a usere.uxtee -a : display the o/p on monitor and save (append) in the file also.--Shambhu

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Write a shell script that reports the logging in of a specified user within one minute after he/she logs in. The script automatically terminates if the specified user does not login during a specified period of time.

Jyoti Ranjan

 Profile Answers by Jyoti Ranjan Questions by Jyoti Ranjan

• Aug 4th, 2010

at command to execute the script at a specified timeDuration is assumesd as 150 minutesat -k -f log_chck -t 1008041555.00Contents of log_chck script #!/bin/ksh # Check if the user is logged ...

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My question is how to create multiple users , using shell script ?
How to check the script is successfully execute or not?

Amita

• Nov 1st, 2015

I do not have idea about how to create multiple user but we can check successfull execution of script by $? If it returns zero that means script is executed successfully.

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What is the command to print the 3rd argument within this variable var={123 def ghi 456};
a) echo $3v
b) echo $v3
c) echo$3$v
d) None of these

malu

• Nov 19th, 2016

Echo $3v

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Kirthika J

• Jul 15th, 2011

Named pipe is FIFO.FIFO pipe create syntax is mknod() or mkfifo().Main thing in pipe,we cannot see the created pipe any where in the system.Named pipe is a file persistent.

Masthan

• Jun 9th, 2007

Named pipe is nothing but FIFO

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