Linux Command Line.

9. Executing will

Create a shell variable called DATE and set it to $(date).

Create a shell variable called DATE and set it to the current date and time.

Echo $DATE

Create a shell variable called DATE and set it to $(date), then add it to the environment.

Export DATE=$(date)

Create a shell variable called DATE and set it to the current date and time, then add it to the environment.

Alias DATE=date

Create an alias called DATE and set it to run the date command. (Good for folks with caps lock on.)

10. Modify $PATH by adding to the end because

you want any system commands with the same name to be found first.

the variable is last-in-first-out like a stack.

the PATH variable can only expand; you cant just reset it to be an empty string, for example.

it is exported, so you want to make sure the exported string is larger.

adding it to the beginning is just what my cybercriminal friends would expect me to do.

31. There is a command which according to the man page will do nothing, unsuccessfully. Thus, it is sometimes specified as the login shell for accounts that should never be used for login. I want to count how many user accounts are set to run this program as their shell. Give me one command it can include pipes of course that will tell me how many accounts are using this program as their shell.