a) List all the files and sub directories of the directory /bin.
Ans: The command for listing all the files and sub directories of the directory /bin is “cd bin | ls –l”
b) List all the files including hidden files in your current directory.
Ans: The command for including all the hidden files in our current directory is “ls -a”.
c) List all the files starting with letter ‘r’ in your current directory.
Ans: The command for listing all the files starting with letter ‘r’ in your current directory is “ls –al r*”
d) List all the files having three characters in their names, from your current directory.
Ans: The file having three characters in their names from tha current directory is “ls *abc*”.
e) List all the files with extension .doc in your current directory.
Ans: The command for listing all the files with extension .doc in your current directory is “ls *.doc”.
Q2.
a) Using one single command, display the output of
“who” and “pwd” commands.
Ans: The command that display the output of ‘who’ and ‘pwd’ commands together is “who ; pwd”.
b) Display the system date in following format: Today is Friday, 17 May 12
Ans: echo “Today is” date
c) Display the following text message on the monitor screen. Deposited $100 to you account.
Ans: echo “Deposited \$100 to you account”.
d) Display the following message on the monitor.
The long listing of my home dir ………… is
…………
(Hint: Use ls – l and pwd commands)
Ans: echo “The long listing of my home dir ‘pwd’ is ‘ls –l’ ”.
Q3.
Accept a file name and a number (x). Display x lines
from the top of the file.
Check if the file exists and is readable. The value
of x should not exceed the total number of lines in the files. Display
suitable messages in case an error is encountered.
Ans: echo “enter the file name that we have to display”
read a
if [ -e $a
]
then
echo “enter
the nos. of lines”
read b
x = ‘wc –l
$a’
if [ $b –le
$x ]
then
head -$b $a
else
echo “entered
line is not found”
fi
else
echo “the
file does not exist”
fi
