Linux Quiz

What is the whole command to show long formatted list of the files in directory?

• ls -l

• ls -ltu

• ls -ltr

• ls -ltc

I want to pass color argument. What I need to use?

• --

• -

• ls -color

• ls --color

I want to create 100 directories named hello001 to hello100. What is the command?

• mkdir hello(001..100)

• mkdir hello{001..100}

• mkdirhello[001..100]

• mkdir hello(1..100)

Which example represents the situation, when Command2 operates on output from Command1?

• Command2 | Command1

• Command1 || Command2

• Command1 | Command2

• Command1 | Command3 | Command2

I have a file where each line contains one word. I want to know how many unique words I have in file. What command will do the job?

• cat file | sort | wc -l

• cat file | sort | wc -l | uniq

• cat file | uniq | sort | wc -l

• cat file | sort | uniq | wc -l

the wc -l < numbers.txt command will

• count letters in the filename of the file

• count number of lines in numbers.txt file

• write count into numbers.txt file

752 represents

• rwx-rx-w-

• rwx-wx-w-

• rwx-rw-w-

• rwx-rwr--

u=rwx,g=r,o=r in digits will be

• 744

• 644

• 622

• 711

I have the script in my home directory. I want to ensure, that the group is able to read an execute (not write) and others can execute the script. What should I set?

• 3 for group and 1 for others

• 5 for group and 1 for others

• 3 for group and 2 for others

• 7 for group and 5 for others

To copy a file, the command used is

(a)