unix shell commands

What is a shell script?

• group of commands

• a file containing special symbols

• a file containing a series of commands

• group of functions

Shell scripts need to be saved with an extension .sh .

• True

• False

The first line in any shell script begins with a _____

• a) &

• b) !

• c) $

• d) #

To run the script, we should make it executable first by using _____

• a) chmod +x

• b) chmod +r

• c) chmod +w

• d) chmod +rwx

Which command is used for making the scripts interactive?

• a) ip

• b) input

• c) read

• d) write

The first argument is read by the shell into the parameter ___

• a) 1$

• b) $3

• c) $$

• d) $1

The complete set of positional parameters is stored in ______ as a single string.

• a) $n

• b) $#

• c) $*

• d) $$

Which command is used to display the top of the file?

• A cat

• B.head

• C.more

• D.grep

• E.None of the above

which commands gives the no of recently logged in users?

• who

• who | wc -w

• whoami | wc -l

• who | wc -l

find out the 7th character of the word 'ENCYCLOPAEDIA'?

• cut -f7 -d' ' 'ENCYCLOPAEDIA'

• cut -d' ' -c7 'ENCYCLOPAEDIA'

• cut -c7 'ENCYCLOPAEDIA'

• none of the above