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04.22.2008 at 06:42AM PDT, ID: 23342868
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Regarding help in unix

Hi,

    I need small help, can anybody please help me tommorrow i have a client interview with the following questions.



1)Find out what the umask command is for.Use it in your.profilefile

2)Build a shell-script that counts the number of users currently logged in the system.

3)Build a shell-script that tells you whether a given user is currently logged in the system

4)Build a shell-script that prints the name of all the files in the current directory that contain the work passed as a parameter.

example : find_word script
file1.txt
file2.txt

5)Modify the previous shell script to search into the whole tree of subdirectories starting from the current one.

6) Create a file and several links(hard and soft).Examine their differences by

1. Listing the directory(ls)
2.Deleting the original file and access the softlinks and hard links SETUID/SETGID



Please help me in advance
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Question Stats
Zone: OS
Question Asked By: kirank05
Solution Provided By: Tintin
Participating Experts: 2
Solution Grade: B
Views: 0
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04.22.2008 at 07:01AM PDT, ID: 21411161

Rank: Guru

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04.22.2008 at 07:33AM PDT, ID: 21411474

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04.22.2008 at 07:44AM PDT, ID: 21411587

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04.22.2008 at 10:20PM PDT, ID: 21417918

Rank: Wizard

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04.22.2008 at 07:01AM PDT, ID: 21411161

Rank: Guru

ansewrs:

1- umask man page

http://linux.die.net/man/1/umask

2- use

either of

who | wc -l

or

w

and see the forst line which has the info

3- use

who | grep username

4- use

grep $1 *

5- use

find . -print | xargs grep $1

6- use

cp /etc/hosts file
ln file h_file
ln -s file s_file
ls -li file h_file s_file
rm file
cat h_file
cat s_file

 
04.22.2008 at 07:33AM PDT, ID: 21411474
Thanks for your great help

additionally i need the following help


7) Create a file and change its rights to see how it affects when you want to read/write/delete it.


8) Execute a few commands redirection their standard input/output/error to see what happen

9)FTYPE
------
Rewrite the following exampl using if-the-else and test.
you should not use ls or case

#!/bin/sh

if[$# -lt 1]
then
read file
else
file=$1
fi

if[-s $file]
then

case `ls -dl $file` in
-*) echo "$file is a regular file";;
d*) echo "$file is a directory";;

*) echo "Unknown type";;
esac
else
echo "File not found or completely empty"
fi


Please help me in advance
 
04.22.2008 at 07:44AM PDT, ID: 21411587

Rank: Guru

7-

touch file1
cp /etc/hosts file1
chmod -w file1
cp /etc/hosts file1
cp file1 file2
ls -l file1
chmod -r file1
cp file1 file3
rm file1

8-

cat < /etc/hosts > file4
cat < /etc/hostz > file4 2> errors
cat errors

9-

if[-s $file]
then
       if [ -f $file ]
       then
               echo "$file is a regular file"
       elif [ -d $file ]
       then
                echo "$file is a directory"
       else
                echo "Unknown type"
       fi
else
       echo "File not found or completely empty"
fi
 
04.22.2008 at 10:20PM PDT, ID: 21417918

Rank: Wizard

Sounds awfully like a homework/assignment question.
Accepted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628