Which of the following option of Is command can be used to view hidden files? A. B. C.-a D.-i Which command creates an empty file if it does not exist? A. cat B. touch C. ed D. read Which option of rm command is used to remove a directory including all its subdirectories? A. b B. C.-p D. What is the command to check process status? A. grep B. ps C. count D. cut

Assume your prompt is in the Jobs directory. Give one command to list the contents of the Reports directory and redirect the output to a file named list.txt in the same directory (Reports).

UNix and bash please write line by line with result and screenshot Create a directory called dir1. Create 10 files in dir1 in whatever way you would like, and fill them with at least a few lines of text. Record how you did this here.Then, write a bsub command line that will submit a job for each file in dir1 to the express squeue that simply “cats” the file. The output file (stdout) for each job should be the <filename>.out. That is, the first job should execute the command:   cat file1   and the output should be in file: file1.out

show the outcomes as well, and the txt

A subdirectory of the current working directory called already exists and is called top. Enter Bash commands to:   Make subdirectories of top called nope and yep Make an empty file in nope called reasons.txt Make an empty file in yep called unreasons.csv

Write a command that revokes write permissions from group and other for all files in the current working directory.

After typing the ls –F command, you see the following line in the output:  -rw-r-xr- - 1 user1 root 0 Apr 29 15:40 file1What does this mean?*       a. User1 has read and write, members of the root group have read and execute, and all others have read permissions to the file.       b. Members of the root group have read and write, user1 has read and execute, and all others have read permissions to the file.       c. All users have read and write, members of the root group have read and execute, and user1 has read permissions to the file.       d. User1 has read and write, all others have read and execute, and members of the root group have read permissions to the file.

1. In an earlier assignment, you created a fileAsst directory containing several files. Give a command that will create a file named listing.dat, in your current (commandsAsst) directory, containing a list of the names of all the files in your fileAsst directory. The listing must not include dates, file sizes, or any information other than the names. 2. Someone has decided that the function sequentialInsert, declared in -cs252/Assignments/commandsAsst/project/arrayops.h, should be renamed orderedInsertion. Give a command to produce the altered version the header file, saving it as ~/UnixCourse/commandsAsst/arrayops.h (Something to think about: Why would the same approach not work well for changing the variable name i to i0?) 3. Sometimes programmers propose changes to an existing software definition and need to know what other code could be affected by the change. Suppose that you are a programmer who has proposed a change to the C/C++ data type known as "timespec". You know that there…

Write the command that will create a tar archive of all the files in the directory named"/fir/sec/thi", that exists on the local machine. The name of the tar archive is "/tmp/animal".The command should be executed from the directory /home/user1.  Write the command that will extract the tar archive that was created in Question #63. The contentsof the archive should be placed in the directory "/two/four/six". The command should be executedwhile the current directory is /tmp.

Create a file named foo. What happens when you run the command > In foo bar if bar doesn't exist? bar exists as an ordinary file? bar exists as a directory? Make sure you precede each of your answer with the "if . . ." condition. Copy the pertaining command(s) and their output(s) from your terminal to justify your answers.