Makes ls for a non-existent file and prints a message with exitcode. It then creates this file and prints out a new exitcode. In each sub-task, send the output of ls to /dev/null.
Asks the user to enter the name of the folder it then creates. Then it changes the working directory to a new folder and displays a message about the current folder. Then it creates a new file and writes random information to it. Shows the contents of the file to the user.
Asks the user for a number (1, 2, or 3) and calls the function with the corresponding number in the name. The function displays a message containing its number.
Receives the number of the month as input and outputs its name.
Has one argument and displays its value. It also handles the error if there is no argument, and displays an appropriate message.
Create groups “test_group”, “my_group”. Create user “super_user”. Add “super_user” to sudoers file, grant ALL permissions with ability to run commands without password prompt. Create N users in test_group as primary group, my_group as secondary group and comment “test users”. Usernames are “test[1-N]”. Password is “password" for all. N=5. Create temp file with size 100k in super_user’s home dir, copy this file to test users home dir. Change ownership on copied file from superuser to $username:$secondary_group. Set permissions -wxr--r-x on copied file. Delete previously created users and groups. Remove super_user from sudoers file using SED.
Killall utility.
Init for MongoDB.